feat: open Day view when tapping a date header in Week/Agenda

Tapping a date header in the Week (day-of-week column) and Agenda
(sticky section) views now drills into that date in Day view, mirroring
the Agenda widget's header behaviour. Both reuse the existing onOpenDay
callback (pendingDayIso + drillToDay) that Month already used, so the
back stack lands on Day with the tapped view as its parent.

Month already navigated on any cell tap (the transparent tap layer sits
above the day number), so no change was needed there — all four views
now behave consistently.

Closes #37

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.gitignore

@@ -55,3 +55,6 @@ Thumbs.db
 
 # KSP
 .ksp/
+
+# Claude Code
+/CLAUDE.md

CHANGELOG.md

@@ -5,9 +5,55 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased]
+## [2.13.1] — 2026-07-06
 
 ### Added
+- Create events from other apps and widgets. Calendula now registers the
+  standard "insert event" intent (`ACTION_INSERT` on the calendar events type),
+  so other apps and home-screen widgets — such as the Todo Agenda widget — can
+  hand off to Calendula to create a new event. It opens the new-event form
+  prefilled with whatever they passed (title, start/end time, all-day, location,
+  description, recurrence), and picks your last-used or first writable calendar.
+  Thanks to @dschuermann for the suggestion ([#30]).
+
+### Fixed
+- Some recurring events could not be opened. Events in a series that started
+  before 1970 — for example yearly birthdays or anniversaries synced over CalDAV
+  — showed "Something went wrong" instead of opening, because their stored start
+  time is a negative value that was wrongly treated as invalid. They now open
+  normally and appear in search again. A related case (an event whose stored end
+  precedes its start) is now kept and openable instead of failing the same way.
+  Thanks to @dschuermann for the report ([#34]).
+- The time picker now follows your 24-hour setting. With Calendula set to
+  24-hour time, the clock dial for choosing an event's start and end time still
+  showed AM/PM instead of a 24-hour dial; it now matches your setting (and the
+  same fix applies to the all-day reminder time in Settings). Thanks to
+  @abrossimow for the report ([#27]).
+
+## [2.13.0] — 2026-07-03
+
+### Added
+- Calendula now speaks Spanish and Italian. Both arrived as community
+  translations through [Calendula's Weblate](https://weblate.dev.jeanlucmakiola.de/projects/calendula/)
+  — a **huge thank you** to
+  [kikerw](https://weblate.dev.jeanlucmakiola.de/user/kikerw/) for the Spanish
+  translation and to
+  [corrent](https://weblate.dev.jeanlucmakiola.de/user/corrent/) for the Italian
+  one! Pick your language under Settings → Language or in Android's per-app
+  language settings. Strings added in this very release may still show in
+  English until the translations catch up. Want Calendula in your language?
+  Translating happens entirely in the browser — every contribution is welcome.
+- See your contacts' birthdays and anniversaries in your calendar. A new,
+  **optional** feature (Settings → Contact special dates) mirrors your contacts'
+  birthdays, anniversaries and other dates into local "Birthdays",
+  "Anniversaries" and "Other dates" calendars that stay in sync as your contacts
+  change. Each is a normal local calendar, so you set its colour, visibility and
+  reminders the usual way — new birthdays even start with a reminder a week before
+  *and* on the day. The title format is yours to customise (`{name}`, `{year}`).
+  This is the first feature to use the contacts permission: it is requested only
+  when you turn the feature on, everything stays on your device (Calendula has no
+  internet access), and your contacts are only ever read, never changed. Thanks
+  to @moonj for the suggestion ([#15]).
 - Set more than one default reminder per calendar. A calendar's default
   reminders — and the global defaults under Settings → Notifications — can now
   hold several lead times instead of just one, so new events can start with, say,
@@ -22,6 +68,18 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   date number — now opens that day, and the "today" button snaps the grid back
   to the current month in place. Thanks to @rgz46vic and @ptab for the
   suggestions ([#18], [#20]).
+- Make Calendula's text your own. Settings → Appearance gains **Headings font**
+  and **Body font** pickers: keep the system default, choose a bundled face
+  (Atkinson Hyperlegible, Lora, JetBrains Mono — each previewed in its own
+  face), or load any `.ttf`/`.otf` file from your device, independently per
+  role. Font size and colour stay with Android's accessibility scaling and the
+  app theme, as discussed on the issue. Thanks to @abrossimow for the
+  suggestion ([#19]).
+- Choose what the view-switch button cycles through. Settings → Appearance now
+  lets you pick which views the top-right quick-switch button rotates between
+  and drag them into your preferred order; views you switch off stay reachable
+  from the navigation menu, which can be reordered the same way. Thanks to
+  @abrossimow for the suggestion ([#24]).
 
 ### Fixed
 - Month widget arrows and "today" button work again. On release builds the
@@ -38,6 +96,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   nothing applied. The edited occurrence is now stored correctly, so the change
   lands on just that one event and leaves the rest of the series untouched
   ([#16]).
+- Every calendar can be picked when creating an event. The event editor's
+  calendar picker was a fixed-height dialog, so with many calendars anything
+  past the first nine or so was simply unreachable. It is now a full-screen,
+  scrollable list grouped by account, with each calendar's colour shown.
+  Thanks to @dschuermann for the report ([#29]).
 
 ## [2.12.0] — 2026-06-28
 
@@ -764,7 +827,14 @@ automatically, with zero telemetry and no internet permission.
 [#12]: https://codeberg.org/jlmakiola/calendula/issues/12
 [#13]: https://codeberg.org/jlmakiola/calendula/issues/13
 [#14]: https://codeberg.org/jlmakiola/calendula/issues/14
+[#15]: https://codeberg.org/jlmakiola/calendula/issues/15
 [#16]: https://codeberg.org/jlmakiola/calendula/issues/16
 [#17]: https://codeberg.org/jlmakiola/calendula/issues/17
 [#18]: https://codeberg.org/jlmakiola/calendula/issues/18
+[#19]: https://codeberg.org/jlmakiola/calendula/issues/19
 [#20]: https://codeberg.org/jlmakiola/calendula/issues/20
+[#24]: https://codeberg.org/jlmakiola/calendula/issues/24
+[#27]: https://codeberg.org/jlmakiola/calendula/issues/27
+[#29]: https://codeberg.org/jlmakiola/calendula/issues/29
+[#30]: https://codeberg.org/jlmakiola/calendula/issues/30
+[#34]: https://codeberg.org/jlmakiola/calendula/issues/34

app/build.gradle.kts

@@ -28,8 +28,8 @@ android {
         // which builds this version and then creates the matching vX.Y.Z tag +
         // release itself (versionCode is pinned to MAJOR*10000 + MINOR*100 +
         // PATCH from versionName, e.g. 2.7.2 -> 20702). See docs/RELEASING.md.
-        versionCode = 21200
+        versionCode = 21301
-        versionName = "2.12.0"
+        versionName = "2.13.1"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
     }

app/src/main/AndroidManifest.xml

@@ -5,6 +5,15 @@
     <uses-permission android:name="android.permission.READ_CALENDAR" />
     <uses-permission android:name="android.permission.WRITE_CALENDAR" />
     <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
+    <!--
+      Optional and feature-gated: only the "Contact special dates" feature reads
+      contacts, and only after the user enables it and grants this at runtime
+      (never requested at startup). Everything stays offline — birthdays and
+      other contact dates are mirrored one-way into local calendars; contacts
+      are never written and nothing leaves the device (the app has no INTERNET
+      permission). See docs/design/contact-special-dates.md.
+    -->
+    <uses-permission android:name="android.permission.READ_CONTACTS" />
     <!--
       Lets the "Reliable delivery" setting open the direct system dialog to
       exempt Calendula from battery optimisation (so reminder broadcasts aren't
@@ -103,6 +112,17 @@
                 <data android:mimeType="text/calendar" />
             </intent-filter>
 
+            <!-- Let another app or widget (e.g. the Todo Agenda widget) launch us
+                 to create a new event, the way the AOSP calendar accepts it:
+                 ACTION_INSERT on the events dir mime type, carrying the new
+                 event's fields as CalendarContract extras
+                 (MainActivity.insertFormOrNull, issue #30). -->
+            <intent-filter>
+                <action android:name="android.intent.action.INSERT" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <data android:mimeType="vnd.android.cursor.dir/event" />
+            </intent-filter>
+
             <!-- Launcher long-press shortcuts (e.g. "New event"). -->
             <meta-data
                 android:name="android.app.shortcuts"

app/src/main/java/de/jeanlucmakiola/calendula/CalendulaApp.kt

@@ -5,6 +5,8 @@ import dagger.hilt.android.EntryPointAccessors
 import dagger.hilt.android.HiltAndroidApp
 import de.jeanlucmakiola.calendula.data.backup.BackupScheduler
 import de.jeanlucmakiola.calendula.data.backup.BackupWorker
+import de.jeanlucmakiola.calendula.data.contacts.SpecialDatesScheduler
+import de.jeanlucmakiola.calendula.data.contacts.SpecialDatesSyncWorker
 import de.jeanlucmakiola.calendula.data.crash.CrashReporter
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
@@ -25,6 +27,7 @@ class CalendulaApp : Application() {
         // respecting, on-device; the user submits the report by hand).
         CrashReporter.install(this)
         reconcileAutoBackup()
+        reconcileSpecialDates()
     }
 
     /**
@@ -44,4 +47,21 @@ class CalendulaApp : Application() {
             )
         }
     }
+
+    /**
+     * Re-arm (or cancel) the daily special-dates reconcile from the saved
+     * settings on every launch — like [reconcileAutoBackup], this cancels
+     * orphaned work after the feature is turned off and re-schedules after a
+     * reinstall. The foreground trigger (RootScreen ON_RESUME) does the on-open
+     * refresh, so no immediate run is needed here.
+     */
+    private fun reconcileSpecialDates() {
+        val deps = EntryPointAccessors.fromApplication(this, SpecialDatesSyncWorker.Deps::class.java)
+        CoroutineScope(SupervisorJob() + Dispatchers.Default).launch {
+            SpecialDatesScheduler.apply(
+                context = this@CalendulaApp,
+                enabled = deps.settingsPrefs().specialDatesEnabled.first(),
+            )
+        }
+    }
 }

app/src/main/java/de/jeanlucmakiola/calendula/MainActivity.kt

@@ -4,6 +4,7 @@ import android.content.Context
 import android.content.Intent
 import android.net.Uri
 import android.os.Bundle
+import android.provider.CalendarContract
 import androidx.activity.compose.setContent
 import androidx.activity.enableEdgeToEdge
 import androidx.appcompat.app.AppCompatActivity
@@ -25,6 +26,8 @@ import dagger.hilt.android.AndroidEntryPoint
 import de.jeanlucmakiola.calendula.data.crash.CrashReporter
 import de.jeanlucmakiola.calendula.data.prefs.ThemeMode
 import de.jeanlucmakiola.calendula.data.prefs.is24Hour
+import de.jeanlucmakiola.calendula.domain.EventForm
+import de.jeanlucmakiola.calendula.domain.buildInsertEventForm
 import de.jeanlucmakiola.calendula.ui.RootScreen
 import de.jeanlucmakiola.calendula.ui.common.LocalShowHourLines
 import de.jeanlucmakiola.calendula.ui.common.LocalUse24HourFormat
@@ -42,6 +45,7 @@ import de.jeanlucmakiola.calendula.ui.theme.resolveFontFamily
 import kotlinx.datetime.LocalDate
 import kotlinx.datetime.TimeZone
 import kotlinx.datetime.toLocalDateTime
+import kotlin.time.Clock
 import kotlin.time.Instant
 
 @AndroidEntryPoint
@@ -60,6 +64,11 @@ class MainActivity : AppCompatActivity() {
     // by CalendarHost's import flow.
     private var requestedImportUri by mutableStateOf<Uri?>(null)
 
+    // A prefilled new-event form from an external ACTION_INSERT launch (another
+    // app/widget asking us to create an event, issue #30). Consumed once by
+    // CalendarHost, which opens it in the create form for review.
+    private var requestedInsertForm by mutableStateOf<EventForm?>(null)
+
     // A captured crash report awaiting the user's decision, surfaced as a dialog
     // over the calendar on the next launch (the single-crash path). A startup
     // crash-loop is handled out of band, before setContent — see below.
@@ -84,6 +93,7 @@ class MainActivity : AppCompatActivity() {
         requestedDetailKey = intent.detailKeyOrNull()
         requestedNav = intent.navRequestOrNull()
         requestedImportUri = intent.importUriOrNull()
+        requestedInsertForm = intent.insertFormOrNull()
         if (CrashReporter.shouldPrompt(this)) pendingCrashReport = CrashReporter.pendingReport(this)
         setContent {
             // One activity-scoped SettingsViewModel drives both the theme here
@@ -132,6 +142,8 @@ class MainActivity : AppCompatActivity() {
                             onWidgetNavConsumed = { requestedNav = null },
                             requestedImportUri = requestedImportUri,
                             onImportConsumed = { requestedImportUri = null },
+                            requestedInsertForm = requestedInsertForm,
+                            onInsertConsumed = { requestedInsertForm = null },
                         )
                     }
                     // A persistent corner marker so a debug build is never
@@ -169,6 +181,7 @@ class MainActivity : AppCompatActivity() {
         intent.detailKeyOrNull()?.let { requestedDetailKey = it }
         intent.navRequestOrNull()?.let { requestedNav = it }
         intent.importUriOrNull()?.let { requestedImportUri = it }
+        intent.insertFormOrNull()?.let { requestedInsertForm = it }
     }
 
     /**
@@ -188,6 +201,31 @@ class MainActivity : AppCompatActivity() {
         return uri.takeIf { it.scheme == "content" || it.scheme == "file" }
     }
 
+    /**
+     * A prefilled new-event form from an external `ACTION_INSERT` launch — another
+     * app or widget (e.g. Todo Agenda) asking us to create an event (issue #30).
+     * The new event's fields ride as CalendarContract extras; anything omitted
+     * falls back to the in-app "new event" defaults in [buildInsertEventForm].
+     */
+    private fun Intent.insertFormOrNull(): EventForm? {
+        if (action != Intent.ACTION_INSERT) return null
+        return buildInsertEventForm(
+            beginMillis = longExtraOrNull(CalendarContract.EXTRA_EVENT_BEGIN_TIME),
+            endMillis = longExtraOrNull(CalendarContract.EXTRA_EVENT_END_TIME),
+            isAllDay = getBooleanExtra(CalendarContract.EXTRA_EVENT_ALL_DAY, false),
+            title = getStringExtra(CalendarContract.Events.TITLE),
+            description = getStringExtra(CalendarContract.Events.DESCRIPTION),
+            location = getStringExtra(CalendarContract.Events.EVENT_LOCATION),
+            rrule = getStringExtra(CalendarContract.Events.RRULE),
+            zone = TimeZone.currentSystemDefault(),
+            now = Clock.System.now(),
+        )
+    }
+
+    /** A Long extra's value, or null when the extra is absent. */
+    private fun Intent.longExtraOrNull(key: String): Long? =
+        if (hasExtra(key)) getLongExtra(key, 0L) else null
+
     /**
      * The date a launcher/clock date tap points at, parsed from the AOSP calendar
      * "view time" intent: ACTION_VIEW on `content://com.android.calendar/time/

app/src/main/java/de/jeanlucmakiola/calendula/data/calendar/AllDayReminderEncoding.kt

@@ -50,6 +50,27 @@ internal fun toProviderAllDayMinutes(
     return ((utcMidnight - fire) / MILLIS_PER_MINUTE).toInt()
 }
 
+/**
+ * The next date on or after [today] carrying [month]/[day] — the date to sample
+ * a yearly all-day reminder's UTC offset at. A managed birthday's DTSTART is an
+ * ancient anchor (1972 for year-less dates), a year whose timezone rules
+ * (pre-DST offsets) differ from today's; sampling the offset there skews every
+ * modern occurrence by hours. Sampling at the upcoming occurrence makes the
+ * stored offset correct for it and its neighbours (only ±1h DST drift remains,
+ * the inherent limit). Feb-29 skips forward to the next leap year.
+ */
+internal fun nextYearlyOccurrence(month: Int, day: Int, today: LocalDate): LocalDate {
+    var year = today.year
+    // A Feb-29 date is valid only every ~4 years; 8 tries always reaches one.
+    repeat(8) {
+        val candidate = runCatching { LocalDate.of(year, month, day) }.getOrNull()
+        if (candidate != null && !candidate.isBefore(today)) return candidate
+        year++
+    }
+    // Unreachable for real month/day inputs; fall back to the raw anchor.
+    return LocalDate.of(today.year, month, day)
+}
+
 /**
  * Recover the semantic whole-day lead time from a raw all-day reminder
  * [rawMinutes]. Keys off the **local date** of the encoded fire instant, so it

app/src/main/java/de/jeanlucmakiola/calendula/data/calendar/CalendarColorPalette.kt

@@ -0,0 +1,22 @@
+package de.jeanlucmakiola.calendula.data.calendar
+
+/**
+ * Google-Calendar-style palette; ARGB ints for a raw `CALENDAR_COLOR` /
+ * `EVENT_COLOR`. The named entries exist for callers that need one specific
+ * hue (the managed special-dates calendars), so they can't drift from the
+ * swatches offered in the colour picker.
+ */
+object CalendarColorPalette {
+    val Red = 0xFFD50000.toInt()
+    val Orange = 0xFFE67C00.toInt()
+    val Amber = 0xFFF6BF26.toInt()
+    val Green = 0xFF33B679.toInt()
+    val DarkGreen = 0xFF0B8043.toInt()
+    val Blue = 0xFF039BE5.toInt()
+    val Indigo = 0xFF3F51B5.toInt()
+    val Purple = 0xFF8E24AA.toInt()
+    val Graphite = 0xFF616161.toInt()
+
+    /** The full palette, in swatch-row order. */
+    val all: List<Int> = listOf(Red, Orange, Amber, Green, DarkGreen, Blue, Indigo, Purple, Graphite)
+}

app/src/main/java/de/jeanlucmakiola/calendula/data/calendar/CalendarDataSource.kt

@@ -24,10 +24,14 @@ import de.jeanlucmakiola.calendula.domain.EventForm
 import de.jeanlucmakiola.calendula.domain.EventInstance
 import de.jeanlucmakiola.calendula.domain.EventStatus
 import de.jeanlucmakiola.calendula.domain.Reminder
+import de.jeanlucmakiola.calendula.domain.contacts.MANAGED_UID_PREFIX
+import de.jeanlucmakiola.calendula.domain.contacts.SpecialDateType
 import de.jeanlucmakiola.calendula.domain.ics.IcsEvent
 import de.jeanlucmakiola.calendula.domain.ics.ParsedIcsEvent
 import de.jeanlucmakiola.calendula.domain.rruleTruncatedAt
 import kotlinx.datetime.toJavaLocalDate
+import java.time.Instant
+import java.time.LocalDate
 import java.time.ZoneId
 import java.time.ZoneOffset
 import java.util.UUID
@@ -97,6 +101,55 @@ interface CalendarDataSource {
     /** Permanently delete a local calendar the app owns, with all its events. */
     fun deleteCalendar(id: Long)
 
+    /**
+     * Create a local calendar tagged as the special-dates mirror for [type]
+     * (a marker in `CAL_SYNC2`); returns its `Calendars._ID`. Otherwise a normal
+     * local calendar, so it inherits per-calendar colour/visibility/reminders.
+     */
+    fun createManagedCalendar(displayName: String, color: Int, type: SpecialDateType): Long
+
+    /**
+     * The app's special-dates calendars, found by their `CAL_SYNC2` marker.
+     * Lets the mirror re-adopt its calendars after the stored ids are lost, and
+     * detect when the user deleted one in system settings.
+     */
+    fun findManagedCalendars(): List<ManagedCalendarRow>
+
+    /**
+     * The managed events in [calendarId] (those carrying a `UID_2445`, not
+     * soft-deleted) as [ManagedEventRow]s — the existing side of the sync diff.
+     */
+    fun queryManagedEvents(calendarId: Long): List<ManagedEventRow>
+
+    /**
+     * Insert a managed event carrying the deterministic [uid] in `UID_2445`;
+     * seeds its reminder rows from [form] (never touched again by sync). Returns
+     * the new `Events._ID`. [allDayReminderTimeMinutes]: see [insertEvent].
+     */
+    fun insertManagedEvent(form: EventForm, uid: String, allDayReminderTimeMinutes: Int): Long
+
+    /**
+     * Overwrite exactly the given managed columns on [eventId] (keys are
+     * `CalendarContract.Events` columns; a null value clears the column). A
+     * bare, targeted update — it never reconciles reminders or attendees, so
+     * user-owned data on the event survives every sync. No-ops on an empty map.
+     */
+    fun updateManagedFields(eventId: Long, values: Map<String, Any?>)
+
+    /**
+     * Replace the reminders on **every managed** event in [calendarId] with
+     * [minutes] (all-day lead times), each encoded so it fires at
+     * [allDayReminderTimeMinutes] on its upcoming occurrence. Used by the
+     * special-dates section so a reminder change applies to existing events too,
+     * not just future ones — the managed calendars treat reminders as a
+     * calendar-level setting. Skips any non-managed (user) event in the calendar.
+     */
+    fun applyManagedCalendarReminders(
+        calendarId: Long,
+        allDayReminderTimeMinutes: Int,
+        minutes: List<Int>,
+    )
+
     /**
      * Insert a new event; returns the new `Events._ID`. [allDayReminderTimeMinutes]
      * (minutes from local midnight) is the wall-clock time all-day reminders
@@ -292,6 +345,140 @@ class AndroidCalendarDataSource @Inject constructor(
         if (deleted == 0) throw WriteFailedException("delete calendar id=$id")
     }
 
+    override fun createManagedCalendar(displayName: String, color: Int, type: SpecialDateType): Long {
+        val name = displayName.trim().ifEmpty { Fallbacks.UNNAMED_CALENDAR }
+        val values = ContentValues().apply {
+            put(CalendarContract.Calendars.ACCOUNT_NAME, LOCAL_ACCOUNT_NAME)
+            put(CalendarContract.Calendars.ACCOUNT_TYPE, CalendarContract.ACCOUNT_TYPE_LOCAL)
+            put(CalendarContract.Calendars.OWNER_ACCOUNT, LOCAL_ACCOUNT_NAME)
+            put(CalendarContract.Calendars.NAME, name)
+            put(CalendarContract.Calendars.CALENDAR_DISPLAY_NAME, name)
+            put(CalendarContract.Calendars.CALENDAR_COLOR, color)
+            put(
+                CalendarContract.Calendars.CALENDAR_ACCESS_LEVEL,
+                CalendarContract.Calendars.CAL_ACCESS_OWNER,
+            )
+            put(CalendarContract.Calendars.VISIBLE, 1)
+            put(CalendarContract.Calendars.SYNC_EVENTS, 1)
+            // The marker that identifies this as our special-dates calendar,
+            // independent of the (user-editable) display name. CAL_SYNC1 already
+            // holds the description, so the marker lives in CAL_SYNC2.
+            put(MANAGED_MARKER_COLUMN, markerFor(type))
+        }
+        val uri = resolver.insert(localCalendarsUri(), values)
+            ?: throw WriteFailedException("create managed calendar")
+        return ContentUris.parseId(uri)
+    }
+
+    override fun findManagedCalendars(): List<ManagedCalendarRow> = resolver.query(
+        CalendarContract.Calendars.CONTENT_URI,
+        arrayOf(CalendarContract.Calendars._ID, MANAGED_MARKER_COLUMN),
+        "${CalendarContract.Calendars.ACCOUNT_TYPE} = ? AND " +
+            "${CalendarContract.Calendars.ACCOUNT_NAME} = ? AND " +
+            "$MANAGED_MARKER_COLUMN IS NOT NULL",
+        arrayOf(CalendarContract.ACCOUNT_TYPE_LOCAL, LOCAL_ACCOUNT_NAME),
+        null,
+    )?.use { c ->
+        buildList {
+            while (c.moveToNext()) {
+                val type = typeForMarker(c.getString(1)) ?: continue
+                add(ManagedCalendarRow(id = c.getLong(0), type = type))
+            }
+        }
+    } ?: emptyList()
+
+    override fun queryManagedEvents(calendarId: Long): List<ManagedEventRow> = resolver.query(
+        CalendarContract.Events.CONTENT_URI,
+        arrayOf(
+            CalendarContract.Events._ID,
+            CalendarContract.Events.UID_2445,
+            CalendarContract.Events.TITLE,
+            CalendarContract.Events.DTSTART,
+            CalendarContract.Events.RRULE,
+        ),
+        // Only our own mirror events (UID prefix), so a user event that somehow
+        // landed in this calendar (e.g. an .ics import) is never seen as
+        // "existing but not desired" and deleted by the diff.
+        "${CalendarContract.Events.CALENDAR_ID} = ? AND " +
+            "${CalendarContract.Events.DELETED} = 0 AND " +
+            "${CalendarContract.Events.UID_2445} LIKE ?",
+        arrayOf(calendarId.toString(), "$MANAGED_UID_PREFIX%"),
+        null,
+    )?.use { c ->
+        buildList {
+            while (c.moveToNext()) {
+                val uid = c.getString(1)?.takeIf { it.isNotEmpty() } ?: continue
+                add(
+                    ManagedEventRow(
+                        eventId = c.getLong(0),
+                        uid = uid,
+                        title = c.getString(2).orEmpty(),
+                        dtStartMillis = c.getLong(3),
+                        rrule = c.getString(4)?.takeIf { it.isNotEmpty() },
+                    ),
+                )
+            }
+        }
+    } ?: emptyList()
+
+    override fun insertManagedEvent(form: EventForm, uid: String, allDayReminderTimeMinutes: Int): Long {
+        // Deterministic UID = the reconciliation key. A re-sync reads it back
+        // (queryManagedEvents) and diffs on it, so a contact never doubles.
+        val times = form.toWriteTimes(ZoneId.systemDefault())
+        val values = buildEventInsertValues(form, uid, times)
+        val eventId = resolver.insert(CalendarContract.Events.CONTENT_URI, values.toContentValues())
+            ?.let(ContentUris::parseId)
+            ?: throw WriteFailedException("insert managed event into calendar id=${form.calendarId}")
+        // Seeded once, then never re-touched by sync — so a user who moves a
+        // birthday reminder keeps their change. Encoded against the upcoming
+        // occurrence, not the ancient DTSTART anchor (wrong timezone offset).
+        val anchor = Instant.ofEpochMilli(times.dtStartMillis).atZone(ZoneOffset.UTC).toLocalDate()
+        insertReminderRows(
+            eventId,
+            managedAllDayReminderMinutes(anchor, form.reminders, allDayReminderTimeMinutes),
+        )
+        return eventId
+    }
+
+    override fun updateManagedFields(eventId: Long, values: Map<String, Any?>) {
+        if (values.isEmpty()) return
+        val rows = resolver.update(
+            ContentUris.withAppendedId(CalendarContract.Events.CONTENT_URI, eventId),
+            values.toContentValues(),
+            null, null,
+        )
+        if (rows == 0) throw WriteFailedException("update managed event id=$eventId")
+    }
+
+    override fun applyManagedCalendarReminders(
+        calendarId: Long,
+        allDayReminderTimeMinutes: Int,
+        minutes: List<Int>,
+    ) {
+        resolver.query(
+            CalendarContract.Events.CONTENT_URI,
+            arrayOf(CalendarContract.Events._ID, CalendarContract.Events.DTSTART),
+            // Only our own mirror events, so a stray user event in this calendar
+            // isn't all-day-re-encoded or stripped of its own reminders.
+            "${CalendarContract.Events.CALENDAR_ID} = ? AND " +
+                "${CalendarContract.Events.DELETED} = 0 AND " +
+                "${CalendarContract.Events.UID_2445} LIKE ?",
+            arrayOf(calendarId.toString(), "$MANAGED_UID_PREFIX%"),
+            null,
+        )?.use { c ->
+            while (c.moveToNext()) {
+                val eventId = c.getLong(0)
+                // Managed events are all-day: DTSTART is a UTC midnight anchor.
+                val anchor = Instant.ofEpochMilli(c.getLong(1))
+                    .atZone(ZoneOffset.UTC).toLocalDate()
+                reconcileReminders(
+                    eventId,
+                    managedAllDayReminderMinutes(anchor, minutes, allDayReminderTimeMinutes),
+                )
+            }
+        }
+    }
+
     override fun instances(beginMillis: Long, endMillis: Long): List<EventInstance> {
         ensureObserversRegistered()
         val uri = CalendarContract.Instances.CONTENT_URI.buildUpon().apply {
@@ -575,35 +762,15 @@ class AndroidCalendarDataSource @Inject constructor(
             .distinct()
 
     override fun insertEvent(form: EventForm, allDayReminderTimeMinutes: Int): Long {
-        val times = form.toWriteTimes(ZoneId.systemDefault())
-        val values = ContentValues().apply {
-            put(
-                CalendarContract.Events.CALENDAR_ID,
-                requireNotNull(form.calendarId) { "EventForm.calendarId is required" },
-            )
         // A globally-unique UID so a later .ics backup/restore can identify
         // the event and not duplicate it on re-import (the provider leaves
         // this null for events it didn't sync). Older rows without one fall
         // back to a stable synthesised UID at export time (deriveIcsUid).
-            put(CalendarContract.Events.UID_2445, "${UUID.randomUUID()}@calendula")
+        val values = buildEventInsertValues(
-            put(CalendarContract.Events.TITLE, form.title.trim())
+            form,
-            put(CalendarContract.Events.ALL_DAY, if (form.isAllDay) 1 else 0)
+            uid = "${UUID.randomUUID()}@calendula",
-            put(CalendarContract.Events.DTSTART, times.dtStartMillis)
+            times = form.toWriteTimes(ZoneId.systemDefault()),
-            // The provider's invariant: recurring rows carry RRULE+DURATION
+        ).toContentValues().apply {
-            // (and no DTEND), one-off rows carry DTEND.
-            if (form.rrule == null) {
-                put(CalendarContract.Events.DTEND, times.dtEndMillis)
-            } else {
-                put(CalendarContract.Events.RRULE, form.rrule)
-                put(CalendarContract.Events.DURATION, times.toRfc2445Duration(form.isAllDay))
-            }
-            put(CalendarContract.Events.EVENT_TIMEZONE, times.timezone)
-            put(CalendarContract.Events.AVAILABILITY, form.availability.toProviderValue())
-            put(CalendarContract.Events.ACCESS_LEVEL, form.accessLevel.toProviderValue())
-            form.location.trim().takeIf { it.isNotEmpty() }
-                ?.let { put(CalendarContract.Events.EVENT_LOCATION, it) }
-            form.description.trim().takeIf { it.isNotEmpty() }
-                ?.let { put(CalendarContract.Events.DESCRIPTION, it) }
             // A null colour just leaves both columns unset (the event inherits
             // its calendar's colour), so only the key/raw cases are written.
             when {
@@ -615,10 +782,25 @@ class AndroidCalendarDataSource @Inject constructor(
         val uri = resolver.insert(CalendarContract.Events.CONTENT_URI, values)
             ?: throw WriteFailedException("insert event into calendar id=${form.calendarId}")
         val eventId = ContentUris.parseId(uri)
-        // Best effort (spec §8): the event exists at this point — a reminder
+        seedReminders(eventId, form, allDayReminderTimeMinutes)
-        // that fails to attach is logged, not surfaced as a failed create.
+        // Guests are best-effort like reminders: a row that fails to attach is
-        encodedReminders(form, allDayReminderTimeMinutes)
+        // logged, not surfaced as a failed create. Calendula never sends an
-            .forEach { minutes ->
+        // invitation — it only writes the rows; the backend decides delivery.
+        insertAttendees(eventId, form.attendees)
+        return eventId
+    }
+
+    /**
+     * Attach [form]'s reminders to a freshly inserted event. Best effort
+     * (spec §8): the event exists at this point — a reminder that fails to
+     * attach is logged, not surfaced as a failed create.
+     */
+    private fun seedReminders(eventId: Long, form: EventForm, allDayReminderTimeMinutes: Int) =
+        insertReminderRows(eventId, encodedReminders(form, allDayReminderTimeMinutes))
+
+    /** Insert one `METHOD_ALERT` reminder row per raw provider offset. */
+    private fun insertReminderRows(eventId: Long, encodedMinutes: List<Int>) {
+        encodedMinutes.forEach { minutes ->
             val reminder = ContentValues().apply {
                 put(CalendarContract.Reminders.EVENT_ID, eventId)
                 put(CalendarContract.Reminders.MINUTES, minutes)
@@ -628,11 +810,25 @@ class AndroidCalendarDataSource @Inject constructor(
                 Log.w(TAG, "Failed to attach reminder ($minutes min) to event $eventId")
             }
         }
-        // Guests are best-effort like reminders: a row that fails to attach is
+    }
-        // logged, not surfaced as a failed create. Calendula never sends an
+
-        // invitation — it only writes the rows; the backend decides delivery.
+    /**
-        insertAttendees(eventId, form.attendees)
+     * A managed all-day event's reminders, encoded so they fire at
-        return eventId
+     * [allDayReminderTimeMinutes] on its **upcoming** occurrence. The event's
+     * DTSTART is an ancient recurrence anchor (see [nextYearlyOccurrence]); using
+     * it directly would sample a stale timezone offset, so the offset is sampled
+     * at the next occurrence of the anchor's month/day instead.
+     */
+    private fun managedAllDayReminderMinutes(
+        anchor: LocalDate,
+        reminders: List<Int>,
+        allDayReminderTimeMinutes: Int,
+    ): List<Int> {
+        val zone = ZoneId.systemDefault()
+        val onDate = nextYearlyOccurrence(anchor.monthValue, anchor.dayOfMonth, LocalDate.now(zone))
+        return reminders
+            .map { toProviderAllDayMinutes(it, onDate, zone, allDayReminderTimeMinutes) }
+            .distinct()
     }
 
     override fun updateEvent(
@@ -1038,6 +1234,17 @@ class AndroidCalendarDataSource @Inject constructor(
         while (moveToNext()) mapper(this@mapAllNotNull)?.let(::add)
     }
 
+    /** The `CAL_SYNC2` marker value identifying a managed calendar's [type]. */
+    private fun markerFor(type: SpecialDateType): String = when (type) {
+        SpecialDateType.Birthday -> "$MANAGED_MARKER_PREFIX:birthday"
+        SpecialDateType.Anniversary -> "$MANAGED_MARKER_PREFIX:anniversary"
+        SpecialDateType.Custom -> "$MANAGED_MARKER_PREFIX:custom"
+    }
+
+    /** Inverse of [markerFor]; null for a value that isn't one of ours. */
+    private fun typeForMarker(marker: String?): SpecialDateType? =
+        SpecialDateType.entries.firstOrNull { markerFor(it) == marker }
+
     private companion object {
         const val TAG = "CalendarDataSource"
 
@@ -1047,6 +1254,14 @@ class AndroidCalendarDataSource @Inject constructor(
          */
         const val LOCAL_ACCOUNT_NAME = "Calendula"
 
+        /**
+         * Column and namespace for the special-dates marker (shared with the
+         * calendar projection, which reads it into [CalendarSource.isManaged]).
+         * CAL_SYNC1 already holds the local-calendar description, so it uses CAL_SYNC2.
+         */
+        val MANAGED_MARKER_COLUMN: String = CalendarProjection.MANAGED_MARKER_COLUMN
+        const val MANAGED_MARKER_PREFIX = CalendarProjection.MANAGED_MARKER_PREFIX
+
         /**
          * How far ahead/behind a search looks for a recurring event's nearest
          * occurrence (~2 years). Wide enough for everyday series; a series that

app/src/main/java/de/jeanlucmakiola/calendula/data/calendar/CalendarMapper.kt

@@ -24,5 +24,12 @@ internal fun ColumnReader.toCalendarSource(): CalendarSource {
         } else {
             null
         },
+        // A special-dates mirror calendar, recognised by its durable CAL_SYNC2
+        // marker (only meaningful on the local calendars the app owns). This is
+        // the source of truth for the editor lock — independent of any stored
+        // preference that a backup restore could have wiped.
+        isManaged = isLocal &&
+            getString(CalendarProjection.IDX_MANAGED_MARKER)
+                ?.startsWith(CalendarProjection.MANAGED_MARKER_PREFIX) == true,
     )
 }

app/src/main/java/de/jeanlucmakiola/calendula/data/calendar/EventDetailMapper.kt

@@ -23,26 +23,29 @@ internal fun ColumnReader.toEventDetailCore(
     attendees: List<Attendee>,
     reminders: List<Reminder>,
 ): EventDetail? {
-    val begin = getLong(EventDetailProjection.IDX_DTSTART)
+    // DTSTART is epoch millis in UTC, so a series anchored before 1970 (common
-
+    // for yearly birthdays/anniversaries synced over CalDAV) is legitimately
-    if (begin < 0L) {
+    // negative — only an *absent* DTSTART marks a malformed row worth dropping.
-        Log.w(TAG, "Dropping event with negative dtstart=$begin")
+    // Dropping negatives made every occurrence of such a series un-openable
+    // (the detail loads the ancient series-master DTSTART), see issue #34.
+    if (isNull(EventDetailProjection.IDX_DTSTART)) {
+        Log.w(TAG, "Dropping event with missing dtstart")
         return null
     }
+    val begin = getLong(EventDetailProjection.IDX_DTSTART)
 
     // Recurring events store DURATION instead of DTEND, so the series row's
     // DTEND is null. Keep the event (end == begin); callers that opened a
     // specific occurrence supply the real per-occurrence times from
-    // CalendarContract.Instances. Only a present-but-backwards DTEND is malformed.
+    // CalendarContract.Instances. A present-but-backwards DTEND is malformed,
+    // but dropping the row would make the event un-openable — the same trap as
+    // the pre-1970 DTSTART bug above (issue #34): it would surface as the
+    // generic error screen with no way to open the event and fix it. Clamp to a
+    // zero-length event instead (matching SearchMapper's coerceAtLeast).
     val end = if (isNull(EventDetailProjection.IDX_DTEND)) {
         begin
     } else {
-        val rawEnd = getLong(EventDetailProjection.IDX_DTEND)
+        getLong(EventDetailProjection.IDX_DTEND).coerceAtLeast(begin)
-        if (rawEnd < begin) {
-            Log.w(TAG, "Dropping event with dtend=$rawEnd < dtstart=$begin")
-            return null
-        }
-        rawEnd
     }
 
     // Kept raw (no untitled fallback): the detail screen substitutes its own

app/src/main/java/de/jeanlucmakiola/calendula/data/calendar/EventWriteMapper.kt

@@ -49,6 +49,42 @@ internal fun EventWriteTimes.toRfc2445Duration(isAllDay: Boolean): String = if (
     "P${(dtEndMillis - dtStartMillis) / 1_000L}S"
 }
 
+/**
+ * Column values for a brand-new Events row: identity, times (the provider's
+ * invariant — recurring rows carry RRULE+DURATION and no DTEND, one-off rows
+ * carry DTEND), availability/access level and trimmed optional text. Shared by
+ * the user-event and managed-event insert paths, which differ only in the
+ * [uid] they stamp; colour and attendees are user-event concerns the caller
+ * layers on top.
+ */
+internal fun buildEventInsertValues(
+    form: EventForm,
+    uid: String,
+    times: EventWriteTimes,
+): Map<String, Any?> = buildMap {
+    put(
+        CalendarContract.Events.CALENDAR_ID,
+        requireNotNull(form.calendarId) { "EventForm.calendarId is required" },
+    )
+    put(CalendarContract.Events.UID_2445, uid)
+    put(CalendarContract.Events.TITLE, form.title.trim())
+    put(CalendarContract.Events.ALL_DAY, if (form.isAllDay) 1 else 0)
+    put(CalendarContract.Events.DTSTART, times.dtStartMillis)
+    if (form.rrule == null) {
+        put(CalendarContract.Events.DTEND, times.dtEndMillis)
+    } else {
+        put(CalendarContract.Events.RRULE, form.rrule)
+        put(CalendarContract.Events.DURATION, times.toRfc2445Duration(form.isAllDay))
+    }
+    put(CalendarContract.Events.EVENT_TIMEZONE, times.timezone)
+    put(CalendarContract.Events.AVAILABILITY, form.availability.toProviderValue())
+    put(CalendarContract.Events.ACCESS_LEVEL, form.accessLevel.toProviderValue())
+    form.location.trim().takeIf { it.isNotEmpty() }
+        ?.let { put(CalendarContract.Events.EVENT_LOCATION, it) }
+    form.description.trim().takeIf { it.isNotEmpty() }
+        ?.let { put(CalendarContract.Events.DESCRIPTION, it) }
+}
+
 /**
  * Dirty-checked column values for updating an existing Events row: only what
  * the user actually changed is written, so untouched fields can't stomp

app/src/main/java/de/jeanlucmakiola/calendula/data/calendar/ManagedCalendar.kt

@@ -0,0 +1,24 @@
+package de.jeanlucmakiola.calendula.data.calendar
+
+import de.jeanlucmakiola.calendula.domain.contacts.SpecialDateType
+
+/**
+ * One of the app's special-dates calendars, discovered by the marker stamped in
+ * its `CAL_SYNC2` column — so the mirror can re-adopt its calendars even if the
+ * stored ids in preferences were lost (e.g. an app-data wipe).
+ */
+data class ManagedCalendarRow(val id: Long, val type: SpecialDateType)
+
+/**
+ * A managed event as read back for the sync diff. [uid] is the deterministic
+ * `Events.UID_2445` (`contact-<type>:<lookupKey>@calendula`) the mirror keys on;
+ * [title], [dtStartMillis] and [rrule] are the managed columns compared against
+ * the desired state to decide whether a targeted update is needed.
+ */
+data class ManagedEventRow(
+    val eventId: Long,
+    val uid: String,
+    val title: String,
+    val dtStartMillis: Long,
+    val rrule: String?,
+)

app/src/main/java/de/jeanlucmakiola/calendula/data/calendar/Projections.kt

@@ -15,9 +15,17 @@ internal object CalendarProjection {
         // own we stash one in CAL_SYNC1 (synced rows put their sync token here,
         // so the mapper only reads it for local calendars).
         DESCRIPTION_COLUMN,
+        // The special-dates marker (CAL_SYNC2) — the durable identity the app
+        // uses to recognise its own managed calendars, independent of any
+        // stored preference id (which a backup restore / data wipe can lose).
+        MANAGED_MARKER_COLUMN,
     )
 
     const val DESCRIPTION_COLUMN: String = CalendarContract.Calendars.CAL_SYNC1
+    const val MANAGED_MARKER_COLUMN: String = CalendarContract.Calendars.CAL_SYNC2
+
+    /** Namespace prefix of every managed-calendar [MANAGED_MARKER_COLUMN] value. */
+    const val MANAGED_MARKER_PREFIX = "calendula.specialdates"
 
     const val IDX_ID = 0
     const val IDX_DISPLAY_NAME = 1
@@ -27,6 +35,7 @@ internal object CalendarProjection {
     const val IDX_VISIBLE = 5
     const val IDX_ACCESS_LEVEL = 6
     const val IDX_DESCRIPTION = 7
+    const val IDX_MANAGED_MARKER = 8
 }
 
 internal object InstanceProjection {

app/src/main/java/de/jeanlucmakiola/calendula/data/calendar/SearchMapper.kt

@@ -10,8 +10,11 @@ import de.jeanlucmakiola.calendula.domain.ics.parseRfc2445DurationMillis
  * of DTEND — reconstruct the end the same way the `.ics` export does.
  */
 internal fun ColumnReader.toSearchResult(): EventInstance? {
+    // A pre-1970 series anchor is a legitimately negative epoch-millis DTSTART
+    // (see EventDetailMapper / issue #34); drop only a genuinely absent one, so
+    // long-running birthdays/anniversaries still surface in search.
+    if (isNull(SearchProjection.IDX_DTSTART)) return null
     val dtStart = getLong(SearchProjection.IDX_DTSTART)
-    if (dtStart < 0L) return null
     val end = when {
         !isNull(SearchProjection.IDX_DTEND) -> getLong(SearchProjection.IDX_DTEND)
         else -> dtStart + parseRfc2445DurationMillis(getString(SearchProjection.IDX_DURATION))

app/src/main/java/de/jeanlucmakiola/calendula/data/contacts/AndroidSpecialDatesCalendarSpec.kt

@@ -0,0 +1,42 @@
+package de.jeanlucmakiola.calendula.data.contacts
+
+import android.content.Context
+import dagger.hilt.android.qualifiers.ApplicationContext
+import de.jeanlucmakiola.calendula.R
+import de.jeanlucmakiola.calendula.data.calendar.CalendarColorPalette
+import de.jeanlucmakiola.calendula.domain.contacts.SpecialDateType
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * Resolves the localized calendar names/templates and per-type colours the
+ * mirror creates its calendars with. The colours are picked from the shared
+ * palette so managed calendars look native alongside user calendars.
+ */
+@Singleton
+class AndroidSpecialDatesCalendarSpec @Inject constructor(
+    @ApplicationContext private val context: Context,
+) : SpecialDatesCalendarSpec {
+
+    override fun displayName(type: SpecialDateType): String = context.getString(
+        when (type) {
+            SpecialDateType.Birthday -> R.string.special_dates_calendar_birthday
+            SpecialDateType.Anniversary -> R.string.special_dates_calendar_anniversary
+            SpecialDateType.Custom -> R.string.special_dates_calendar_custom
+        },
+    )
+
+    override fun defaultTitleTemplate(type: SpecialDateType): String = context.getString(
+        when (type) {
+            SpecialDateType.Birthday -> R.string.special_dates_default_title_birthday
+            SpecialDateType.Anniversary -> R.string.special_dates_default_title_anniversary
+            SpecialDateType.Custom -> R.string.special_dates_default_title_custom
+        },
+    )
+
+    override fun color(type: SpecialDateType): Int = when (type) {
+        SpecialDateType.Birthday -> CalendarColorPalette.Purple
+        SpecialDateType.Anniversary -> CalendarColorPalette.Red
+        SpecialDateType.Custom -> CalendarColorPalette.Blue
+    }
+}

app/src/main/java/de/jeanlucmakiola/calendula/data/contacts/ContactSpecialDatesDataSource.kt

@@ -0,0 +1,105 @@
+package de.jeanlucmakiola.calendula.data.contacts
+
+import android.Manifest
+import android.content.Context
+import android.content.pm.PackageManager
+import android.provider.ContactsContract
+import android.provider.ContactsContract.CommonDataKinds.Event
+import android.util.Log
+import androidx.core.content.ContextCompat
+import dagger.hilt.android.qualifiers.ApplicationContext
+import de.jeanlucmakiola.calendula.domain.contacts.ContactSpecialDate
+import de.jeanlucmakiola.calendula.domain.contacts.SpecialDateType
+import de.jeanlucmakiola.calendula.domain.contacts.managedUid
+import de.jeanlucmakiola.calendula.domain.contacts.parseContactEventDate
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * Reads the dated `Event` rows (birthdays, anniversaries, custom dates) of the
+ * device's contacts. Read-only and offline — the one-way source for the
+ * special-dates mirror. Requires `READ_CONTACTS`; returns an empty list when
+ * the permission is absent so the sync can degrade to a stalled state rather
+ * than crash.
+ */
+interface ContactSpecialDatesDataSource {
+    fun hasPermission(): Boolean
+
+    /** All usable contact special-dates, deduplicated per contact and type. */
+    fun readSpecialDates(): List<ContactSpecialDate>
+}
+
+/** Whether `READ_CONTACTS` is granted — the gate for every contacts read. */
+fun Context.hasContactsPermission(): Boolean =
+    ContextCompat.checkSelfPermission(this, Manifest.permission.READ_CONTACTS) ==
+        PackageManager.PERMISSION_GRANTED
+
+/** Map a `ContactsContract` event `TYPE` to our calendar bucket. */
+internal fun specialDateTypeForRawEventType(type: Int): SpecialDateType = when (type) {
+    Event.TYPE_BIRTHDAY -> SpecialDateType.Birthday
+    Event.TYPE_ANNIVERSARY -> SpecialDateType.Anniversary
+    else -> SpecialDateType.Custom
+}
+
+@Singleton
+class AndroidContactSpecialDatesDataSource @Inject constructor(
+    @ApplicationContext private val context: Context,
+) : ContactSpecialDatesDataSource {
+
+    override fun hasPermission(): Boolean = context.hasContactsPermission()
+
+    override fun readSpecialDates(): List<ContactSpecialDate> {
+        if (!hasPermission()) return emptyList()
+        val resolver = context.contentResolver
+        // A contact can carry the same date more than once (multiple raw contacts
+        // under one aggregate); dedup on the mirror's reconciliation key so exact
+        // duplicates collapse while genuinely distinct dates (two custom events on
+        // one contact) are all kept. Ordered by Data._ID so which of two truly
+        // conflicting rows wins is stable across syncs (no event ping-pong).
+        val seen = HashSet<String>()
+        val result = ArrayList<ContactSpecialDate>()
+        runCatching {
+            resolver.query(
+                ContactsContract.Data.CONTENT_URI,
+                PROJECTION,
+                "${ContactsContract.Data.MIMETYPE} = ?",
+                arrayOf(Event.CONTENT_ITEM_TYPE),
+                "${ContactsContract.Data._ID} ASC",
+            )?.use { c ->
+                val idxDate = c.getColumnIndexOrThrow(Event.START_DATE)
+                val idxType = c.getColumnIndexOrThrow(Event.TYPE)
+                val idxLabel = c.getColumnIndexOrThrow(Event.LABEL)
+                val idxLookup = c.getColumnIndexOrThrow(ContactsContract.Data.LOOKUP_KEY)
+                val idxName = c.getColumnIndexOrThrow(ContactsContract.Data.DISPLAY_NAME_PRIMARY)
+                while (c.moveToNext()) {
+                    val lookup = c.getString(idxLookup)?.takeIf { it.isNotEmpty() } ?: continue
+                    val parts = parseContactEventDate(c.getString(idxDate)) ?: continue
+                    val type = specialDateTypeForRawEventType(c.getInt(idxType))
+                    val date = ContactSpecialDate(
+                        lookupKey = lookup,
+                        displayName = c.getString(idxName)?.trim().orEmpty(),
+                        type = type,
+                        month = parts.month,
+                        day = parts.day,
+                        year = parts.year,
+                        label = c.getString(idxLabel)?.takeIf { it.isNotBlank() },
+                    )
+                    if (seen.add(date.managedUid())) result += date
+                }
+            }
+        }.onFailure { Log.w(TAG, "Reading contact special-dates failed", it) }
+        return result
+    }
+
+    private companion object {
+        const val TAG = "ContactSpecialDates"
+
+        val PROJECTION = arrayOf(
+            ContactsContract.Data.LOOKUP_KEY,
+            ContactsContract.Data.DISPLAY_NAME_PRIMARY,
+            Event.START_DATE,
+            Event.TYPE,
+            Event.LABEL,
+        )
+    }
+}

app/src/main/java/de/jeanlucmakiola/calendula/data/contacts/SpecialDatesScheduler.kt

@@ -0,0 +1,135 @@
+package de.jeanlucmakiola.calendula.data.contacts
+
+import android.content.Context
+import android.util.Log
+import androidx.work.CoroutineWorker
+import androidx.work.Data
+import androidx.work.ExistingPeriodicWorkPolicy
+import androidx.work.ExistingWorkPolicy
+import androidx.work.OneTimeWorkRequestBuilder
+import androidx.work.PeriodicWorkRequestBuilder
+import androidx.work.WorkManager
+import androidx.work.WorkerParameters
+import dagger.hilt.EntryPoint
+import dagger.hilt.InstallIn
+import dagger.hilt.android.EntryPointAccessors
+import dagger.hilt.components.SingletonComponent
+import de.jeanlucmakiola.calendula.data.prefs.SettingsPrefs
+import de.jeanlucmakiola.calendula.data.prefs.SpecialDatesStalledReason
+import kotlinx.coroutines.flow.first
+import java.util.concurrent.TimeUnit
+
+/**
+ * Schedules the contact special-dates mirror. Birthdays change rarely, so this
+ * is deliberately cheap: a **daily** periodic reconcile, plus an immediate run
+ * on enable / "Sync now" and a debounced one when the app is foregrounded. No
+ * ContentObserver — it would need the process alive and buys almost nothing for
+ * once-a-year events. Everything stays offline (local contacts → local calendar).
+ */
+object SpecialDatesScheduler {
+
+    private const val WORK_NAME = "special-dates-sync"
+    private const val WORK_NAME_NOW = "special-dates-sync-now"
+    private const val WORK_NAME_FOREGROUND = "special-dates-sync-foreground"
+    private const val KEY_FOREGROUND = "foreground"
+
+    /** Enqueue (or cancel) the daily periodic reconcile to match [enabled]. */
+    fun apply(context: Context, enabled: Boolean) {
+        val workManager = WorkManager.getInstance(context)
+        if (!enabled) {
+            workManager.cancelUniqueWork(WORK_NAME)
+            workManager.cancelUniqueWork(WORK_NAME_NOW)
+            workManager.cancelUniqueWork(WORK_NAME_FOREGROUND)
+            return
+        }
+        val request = PeriodicWorkRequestBuilder<SpecialDatesSyncWorker>(1, TimeUnit.DAYS)
+            // Delay the first periodic run so it never overlaps an immediate run.
+            .setInitialDelay(1, TimeUnit.DAYS)
+            .build()
+        workManager.enqueueUniquePeriodicWork(WORK_NAME, ExistingPeriodicWorkPolicy.UPDATE, request)
+    }
+
+    /**
+     * Run one reconcile immediately. [foreground] runs (the app resuming) are
+     * debounced inside the worker and use their own work name, so a frequent
+     * foreground resync can never REPLACE — and swallow — a pending enable /
+     * "Sync now" run, which always syncs. The engine serializes the two if they
+     * overlap.
+     */
+    fun runNow(context: Context, foreground: Boolean = false) {
+        val request = OneTimeWorkRequestBuilder<SpecialDatesSyncWorker>()
+            .setInputData(Data.Builder().putBoolean(KEY_FOREGROUND, foreground).build())
+            .build()
+        val name = if (foreground) WORK_NAME_FOREGROUND else WORK_NAME_NOW
+        WorkManager.getInstance(context)
+            .enqueueUniqueWork(name, ExistingWorkPolicy.REPLACE, request)
+    }
+
+    internal const val INPUT_FOREGROUND = KEY_FOREGROUND
+}
+
+/**
+ * Runs the [SpecialDatesSyncEngine]. Pulls its collaborators through a Hilt
+ * [EntryPoint] so it works under WorkManager's default worker factory. Records
+ * the run for the settings status line; a missing permission parks the feature
+ * in a stalled state (surfaced in settings) rather than retrying forever.
+ */
+class SpecialDatesSyncWorker(
+    appContext: Context,
+    params: WorkerParameters,
+) : CoroutineWorker(appContext, params) {
+
+    @EntryPoint
+    @InstallIn(SingletonComponent::class)
+    interface Deps {
+        fun settingsPrefs(): SettingsPrefs
+        fun syncEngine(): SpecialDatesSyncEngine
+    }
+
+    override suspend fun doWork(): Result {
+        val deps = EntryPointAccessors.fromApplication(applicationContext, Deps::class.java)
+        val prefs = deps.settingsPrefs()
+
+        val now = System.currentTimeMillis()
+        // A foreground resume can fire often — skip if we synced recently.
+        val foreground = inputData.getBoolean(SpecialDatesScheduler.INPUT_FOREGROUND, false)
+        if (foreground && now - prefs.specialDatesLastForegroundSync.first() < FOREGROUND_DEBOUNCE_MILLIS) {
+            return Result.success()
+        }
+
+        return try {
+            when (val result = deps.syncEngine().sync()) {
+                // The engine re-checks the toggle, so already-queued work never
+                // revives a disabled feature; don't record a run either.
+                SpecialDatesSyncResult.Disabled -> return Result.success()
+                else -> {
+                    val stalled = if (result == SpecialDatesSyncResult.PermissionMissing) {
+                        SpecialDatesStalledReason.PermissionRevoked
+                    } else {
+                        null
+                    }
+                    prefs.recordSpecialDatesRun(now, stalled)
+                }
+            }
+            if (foreground) prefs.setSpecialDatesLastForegroundSync(now)
+            Result.success()
+        } catch (e: SecurityException) {
+            // A revoked calendar/contacts permission won't fix itself on retry —
+            // park the feature in a stalled state (surfaced in settings) instead
+            // of retrying with backoff forever.
+            Log.w(TAG, "Special-dates sync lacks a required permission", e)
+            prefs.recordSpecialDatesRun(now, SpecialDatesStalledReason.PermissionRevoked)
+            Result.success()
+        } catch (e: Exception) {
+            Log.w(TAG, "Special-dates sync failed", e)
+            Result.retry()
+        }
+    }
+
+    companion object {
+        private const val TAG = "SpecialDatesSync"
+
+        /** Skip a foreground-triggered sync if one ran within this window (4h). */
+        private const val FOREGROUND_DEBOUNCE_MILLIS = 4L * 60 * 60 * 1000
+    }
+}

app/src/main/java/de/jeanlucmakiola/calendula/data/contacts/SpecialDatesSyncEngine.kt

@@ -0,0 +1,304 @@
+package de.jeanlucmakiola.calendula.data.contacts
+
+import android.provider.CalendarContract
+import de.jeanlucmakiola.calendula.data.calendar.CalendarDataSource
+import de.jeanlucmakiola.calendula.data.calendar.ManagedEventRow
+import de.jeanlucmakiola.calendula.data.calendar.toWriteTimes
+import de.jeanlucmakiola.calendula.data.prefs.CalendarReminderOverride
+import de.jeanlucmakiola.calendula.data.prefs.SettingsPrefs
+import de.jeanlucmakiola.calendula.domain.Availability
+import de.jeanlucmakiola.calendula.domain.EventForm
+import de.jeanlucmakiola.calendula.domain.RecurrenceFreq
+import de.jeanlucmakiola.calendula.domain.SimpleRecurrence
+import de.jeanlucmakiola.calendula.domain.contacts.ContactSpecialDate
+import de.jeanlucmakiola.calendula.domain.contacts.SpecialDateType
+import de.jeanlucmakiola.calendula.domain.contacts.anchorDate
+import de.jeanlucmakiola.calendula.domain.contacts.managedUid
+import de.jeanlucmakiola.calendula.domain.contacts.renderSpecialDateTitle
+import de.jeanlucmakiola.calendula.domain.toRRule
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.sync.Mutex
+import kotlinx.coroutines.sync.withLock
+import kotlinx.datetime.LocalDateTime
+import kotlinx.datetime.LocalTime
+import java.time.ZoneId
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/** Outcome of one mirror reconcile, reported back so the worker can record status. */
+enum class SpecialDatesSyncResult { Success, Disabled, PermissionMissing }
+
+/**
+ * Localized, per-type presentation the engine needs but can't derive purely
+ * (calendar display name, colour, and the default title template). Kept behind
+ * an interface so the engine's diff stays unit-testable without Android
+ * resources.
+ */
+interface SpecialDatesCalendarSpec {
+    fun displayName(type: SpecialDateType): String
+    fun color(type: SpecialDateType): Int
+    fun defaultTitleTemplate(type: SpecialDateType): String
+}
+
+/**
+ * The stored title template for [type], falling back to the localized default
+ * when blank/absent — the one resolution rule shared by the sync (what gets
+ * written) and the settings editor (what gets shown).
+ */
+fun SpecialDatesCalendarSpec.resolveTitleTemplate(
+    type: SpecialDateType,
+    stored: Map<SpecialDateType, String>,
+): String = stored[type]?.takeIf { it.isNotBlank() } ?: defaultTitleTemplate(type)
+
+/**
+ * Mirrors contact birthdays/anniversaries/custom dates into local calendars,
+ * one per type. Every reconcile is an idempotent diff keyed on the deterministic
+ * `UID_2445` ([managedEventUid]): new contacts are inserted (seeding user-owned
+ * fields once), changed contacts get a *targeted* managed-column update, and
+ * removed contacts are deleted — so a user's own edits (reminders, location,
+ * notes) are never clobbered. See docs/design/contact-special-dates.md.
+ */
+@Singleton
+class SpecialDatesSyncEngine @Inject constructor(
+    private val contacts: ContactSpecialDatesDataSource,
+    private val calendars: CalendarDataSource,
+    private val prefs: SettingsPrefs,
+    private val spec: SpecialDatesCalendarSpec,
+) {
+
+    // Serializes calendar-lifecycle work: two overlapping syncs (the daily job
+    // racing a "Sync now"/foreground run) would each see no managed calendar and
+    // both create one; a teardown racing an in-flight sync would delete calendars
+    // the sync then recreates. Holding this for the whole of sync()/teardown()
+    // makes those check-then-act sequences atomic, and — because sync() re-reads
+    // the enabled flag inside the lock — a teardown always wins the race.
+    private val lifecycleMutex = Mutex()
+
+    /**
+     * Reconcile every enabled type against the device's contacts. Returns why it
+     * stopped early (disabled / permission gone) or [SpecialDatesSyncResult.Success].
+     */
+    suspend fun sync(): SpecialDatesSyncResult = lifecycleMutex.withLock {
+        if (!prefs.specialDatesEnabled.first()) return SpecialDatesSyncResult.Disabled
+        if (!contacts.hasPermission()) return SpecialDatesSyncResult.PermissionMissing
+
+        val enabledTypes = prefs.specialDatesTypes.first()
+        val calendarByType = reconcileCalendars(enabledTypes)
+
+        val desiredByType = contacts.readSpecialDates().groupBy { it.type }
+        val reminderCtx = readReminderContext()
+        val templates = prefs.specialDatesTitleTemplates.first()
+        val showYear = prefs.specialDatesShowYear.first()
+
+        calendarByType.forEach { (type, calendarId) ->
+            val template = spec.resolveTitleTemplate(type, templates)
+            syncType(
+                calendarId = calendarId,
+                type = type,
+                contactsOfType = desiredByType[type].orEmpty(),
+                template = template,
+                showYear = showYear,
+                reminderCtx = reminderCtx,
+            )
+        }
+        SpecialDatesSyncResult.Success
+    }
+
+    /**
+     * Set the reminder default for a type's managed calendar and apply it to
+     * **all** its existing events too (not just future ones) — for managed
+     * calendars the reminder is a calendar-level setting. Persists the per-calendar
+     * all-day override so new events keep matching. No-op if the calendar for
+     * [type] doesn't exist yet.
+     */
+    suspend fun applyReminders(type: SpecialDateType, override: CalendarReminderOverride) {
+        val calendarId = prefs.specialDatesCalendars.first()[type] ?: return
+        prefs.setCalendarAllDayReminderOverride(calendarId, override)
+        val minutes = when (override) {
+            CalendarReminderOverride.Inherit -> prefs.defaultAllDayReminderMinutes.first()
+            CalendarReminderOverride.None -> emptyList()
+            is CalendarReminderOverride.Minutes -> override.minutes
+        }
+        calendars.applyManagedCalendarReminders(
+            calendarId = calendarId,
+            allDayReminderTimeMinutes = prefs.allDayReminderTimeMinutes.first(),
+            minutes = minutes,
+        )
+    }
+
+    /** Delete every managed calendar and forget its id — used when the feature is turned off. */
+    suspend fun teardown() = lifecycleMutex.withLock {
+        calendars.findManagedCalendars().forEach { calendars.deleteCalendar(it.id) }
+        SpecialDateType.entries.forEach { prefs.setSpecialDatesCalendarId(it, null) }
+    }
+
+    /**
+     * Ensure each enabled type has exactly one managed calendar (adopting an
+     * existing one, or the stored id if it still exists, else creating one) and
+     * that disabled types have none. Returns the calendar id per enabled type.
+     */
+    private suspend fun reconcileCalendars(enabledTypes: Set<SpecialDateType>): Map<SpecialDateType, Long> {
+        val foundByType = calendars.findManagedCalendars()
+            .groupBy({ it.type }, { it.id })
+            .mapValues { it.value.first() }
+        val stored = prefs.specialDatesCalendars.first()
+        val result = LinkedHashMap<SpecialDateType, Long>()
+        for (type in SpecialDateType.entries) {
+            // A stored id counts only if the calendar still exists (the user may
+            // have deleted it in system settings); otherwise adopt a found one.
+            val existingId = stored[type]?.takeIf { id -> foundByType.containsValue(id) }
+                ?: foundByType[type]
+            if (type in enabledTypes) {
+                val id = existingId ?: createCalendar(type)
+                if (stored[type] != id) prefs.setSpecialDatesCalendarId(type, id)
+                result[type] = id
+            } else {
+                if (existingId != null) calendars.deleteCalendar(existingId)
+                if (stored.containsKey(type)) prefs.setSpecialDatesCalendarId(type, null)
+            }
+        }
+        return result
+    }
+
+    private suspend fun createCalendar(type: SpecialDateType): Long {
+        // reconcileCalendars persists the id — the single place ids are recorded.
+        val id = calendars.createManagedCalendar(spec.displayName(type), spec.color(type), type)
+        // Seed a useful all-day reminder default (on the day + a week before), so
+        // birthdays get lead time out of the box. Per-calendar, user-adjustable —
+        // only set when the user hasn't already configured this calendar.
+        if (!prefs.perCalendarAllDayReminderOverride.first().containsKey(id)) {
+            prefs.setCalendarAllDayReminderOverride(
+                id,
+                CalendarReminderOverride.Minutes(DEFAULT_REMINDER_MINUTES),
+            )
+        }
+        return id
+    }
+
+    private suspend fun syncType(
+        calendarId: Long,
+        type: SpecialDateType,
+        contactsOfType: List<ContactSpecialDate>,
+        template: String,
+        showYear: Boolean,
+        reminderCtx: ReminderContext,
+    ) {
+        val built = contactsOfType.map { sd ->
+            buildManagedEvent(calendarId, type, sd, template, showYear, reminderCtx)
+        }
+        val diff = diffManagedEvents(built.map { it.desired }, calendars.queryManagedEvents(calendarId))
+        val formByUid = built.associate { it.desired.uid to it.form }
+        diff.insertUids.forEach { uid ->
+            calendars.insertManagedEvent(formByUid.getValue(uid), uid, reminderCtx.allDayTimeMinutes)
+        }
+        diff.updates.forEach { calendars.updateManagedFields(it.eventId, it.columns) }
+        diff.deleteEventIds.forEach { calendars.deleteEvent(it) }
+    }
+
+    private fun buildManagedEvent(
+        calendarId: Long,
+        type: SpecialDateType,
+        sd: ContactSpecialDate,
+        template: String,
+        showYear: Boolean,
+        reminderCtx: ReminderContext,
+    ): BuiltManagedEvent {
+        val anchor = sd.anchorDate()
+        val start = LocalDateTime(anchor, LocalTime(0, 0))
+        // The source year is static and correct on every occurrence (unlike age).
+        val year = if (showYear) sd.year else null
+        val title = renderSpecialDateTitle(template, sd.displayName, year)
+        val form = EventForm(
+            calendarId = calendarId,
+            title = title,
+            isAllDay = true,
+            start = start,
+            end = start,
+            reminders = reminderCtx.resolveAllDay(calendarId),
+            availability = Availability.Free,
+            rrule = YEARLY_RRULE,
+        )
+        val dtStartMillis = form.toWriteTimes(ZoneId.systemDefault()).dtStartMillis
+        return BuiltManagedEvent(
+            desired = ManagedEventDesired(
+                uid = sd.managedUid(),
+                title = title,
+                dtStartMillis = dtStartMillis,
+                rrule = YEARLY_RRULE,
+            ),
+            form = form,
+        )
+    }
+
+    // Managed events are always all-day, so only the all-day defaults apply.
+    private suspend fun readReminderContext(): ReminderContext = ReminderContext(
+        allDayGlobal = prefs.defaultAllDayReminderMinutes.first(),
+        allDayOverrides = prefs.perCalendarAllDayReminderOverride.first(),
+        allDayTimeMinutes = prefs.allDayReminderTimeMinutes.first(),
+    )
+
+    private data class ReminderContext(
+        val allDayGlobal: List<Int>,
+        val allDayOverrides: Map<Long, List<Int>>,
+        val allDayTimeMinutes: Int,
+    ) {
+        /** Same semantics as `resolveDefaultReminder`: present-empty = explicit none. */
+        fun resolveAllDay(calendarId: Long): List<Int> =
+            allDayOverrides[calendarId] ?: allDayGlobal
+    }
+
+    private data class BuiltManagedEvent(val desired: ManagedEventDesired, val form: EventForm)
+
+    private companion object {
+        /** "On the day" (0) + one week before (7 days), as all-day lead minutes. */
+        val DEFAULT_REMINDER_MINUTES = listOf(0, 7 * 24 * 60)
+        val YEARLY_RRULE = SimpleRecurrence(freq = RecurrenceFreq.Yearly).toRRule()
+    }
+}
+
+/** The managed columns of a desired event, compared against the existing row. */
+internal data class ManagedEventDesired(
+    val uid: String,
+    val title: String,
+    val dtStartMillis: Long,
+    val rrule: String?,
+)
+
+internal data class ManagedFieldUpdate(val eventId: Long, val columns: Map<String, Any?>)
+
+internal data class ManagedDiff(
+    val insertUids: List<String>,
+    val updates: List<ManagedFieldUpdate>,
+    val deleteEventIds: List<Long>,
+)
+
+/**
+ * The idempotent diff at the heart of the mirror, keyed on `UID_2445`:
+ * desired-not-existing → insert, existing-not-desired → delete, and for events
+ * in both only the *changed* managed columns (title/dtstart/rrule) are emitted —
+ * so a re-run with no contact changes produces nothing, and a managed update
+ * never touches user-owned columns or reminder rows. Pure, so it's unit-tested.
+ */
+internal fun diffManagedEvents(
+    desired: List<ManagedEventDesired>,
+    existing: List<ManagedEventRow>,
+): ManagedDiff {
+    val desiredByUid = desired.associateBy { it.uid }
+    val existingByUid = existing.associateBy { it.uid }
+    val insertUids = desired.filter { it.uid !in existingByUid }.map { it.uid }
+    val deleteEventIds = existing.filter { it.uid !in desiredByUid }.map { it.eventId }
+    val updates = buildList {
+        for (d in desired) {
+            val row = existingByUid[d.uid] ?: continue
+            val columns = buildMap<String, Any?> {
+                if (row.title != d.title) put(CalendarContract.Events.TITLE, d.title)
+                if (row.dtStartMillis != d.dtStartMillis) {
+                    put(CalendarContract.Events.DTSTART, d.dtStartMillis)
+                }
+                if (row.rrule != d.rrule) put(CalendarContract.Events.RRULE, d.rrule)
+            }
+            if (columns.isNotEmpty()) add(ManagedFieldUpdate(row.eventId, columns))
+        }
+    }
+    return ManagedDiff(insertUids, updates, deleteEventIds)
+}

app/src/main/java/de/jeanlucmakiola/calendula/data/di/DataModule.kt

@@ -14,6 +14,10 @@ import de.jeanlucmakiola.calendula.data.calendar.AndroidCalendarDataSource
 import de.jeanlucmakiola.calendula.data.calendar.CalendarDataSource
 import de.jeanlucmakiola.calendula.data.calendar.CalendarRepository
 import de.jeanlucmakiola.calendula.data.calendar.CalendarRepositoryImpl
+import de.jeanlucmakiola.calendula.data.contacts.AndroidContactSpecialDatesDataSource
+import de.jeanlucmakiola.calendula.data.contacts.AndroidSpecialDatesCalendarSpec
+import de.jeanlucmakiola.calendula.data.contacts.ContactSpecialDatesDataSource
+import de.jeanlucmakiola.calendula.data.contacts.SpecialDatesCalendarSpec
 import de.jeanlucmakiola.calendula.data.reminders.AndroidReminderAlertStore
 import de.jeanlucmakiola.calendula.data.reminders.ReminderAlertStore
 import kotlinx.coroutines.CoroutineDispatcher
@@ -45,6 +49,18 @@ abstract class DataBindModule {
     abstract fun bindReminderAlertStore(
         impl: AndroidReminderAlertStore,
     ): ReminderAlertStore
+
+    @Binds
+    @Singleton
+    abstract fun bindContactSpecialDatesDataSource(
+        impl: AndroidContactSpecialDatesDataSource,
+    ): ContactSpecialDatesDataSource
+
+    @Binds
+    @Singleton
+    abstract fun bindSpecialDatesCalendarSpec(
+        impl: AndroidSpecialDatesCalendarSpec,
+    ): SpecialDatesCalendarSpec
 }
 
 @Module

app/src/main/java/de/jeanlucmakiola/calendula/data/prefs/SettingsPrefs.kt

@@ -9,6 +9,7 @@ import androidx.datastore.preferences.core.longPreferencesKey
 import androidx.datastore.preferences.core.stringPreferencesKey
 import de.jeanlucmakiola.calendula.domain.EventFormField
 import de.jeanlucmakiola.calendula.domain.FontRole
+import de.jeanlucmakiola.calendula.domain.contacts.SpecialDateType
 import de.jeanlucmakiola.calendula.ui.agenda.AgendaRange
 import de.jeanlucmakiola.calendula.ui.agenda.parseAgendaRange
 import de.jeanlucmakiola.calendula.ui.agenda.storageValue
@@ -513,6 +514,95 @@ class SettingsPrefs @Inject constructor(
         }
     }
 
+    // --- Contact special dates (issue #15) ------------------------------
+
+    /** Master switch for the contact special-dates mirror. Default OFF (opt-in). */
+    val specialDatesEnabled: Flow<Boolean> = store.data.map { it[SPECIAL_DATES_ENABLED_KEY] ?: false }
+
+    suspend fun setSpecialDatesEnabled(enabled: Boolean) {
+        store.edit { it[SPECIAL_DATES_ENABLED_KEY] = enabled }
+    }
+
+    /** The date types the user wants mirrored (default: all three). */
+    val specialDatesTypes: Flow<Set<SpecialDateType>> = store.data.map { prefs ->
+        SpecialDateType.entries.filterTo(mutableSetOf()) { prefs[typeEnabledKey(it)] ?: true }
+    }
+
+    suspend fun setSpecialDateTypeEnabled(type: SpecialDateType, enabled: Boolean) {
+        store.edit { it[typeEnabledKey(type)] = enabled }
+    }
+
+    /** The managed calendar id per type, for the ones that currently exist. */
+    val specialDatesCalendars: Flow<Map<SpecialDateType, Long>> = store.data.map { prefs ->
+        SpecialDateType.entries.mapNotNull { type ->
+            prefs[calendarIdKey(type)]?.let { type to it }
+        }.toMap()
+    }
+
+    /** Every managed calendar id — the editor locks title/date/recurrence for their events. */
+    val managedCalendarIds: Flow<Set<Long>> = specialDatesCalendars.map { it.values.toSet() }
+
+    suspend fun setSpecialDatesCalendarId(type: SpecialDateType, calendarId: Long?) {
+        store.edit { prefs ->
+            if (calendarId == null) prefs.remove(calendarIdKey(type)) else prefs[calendarIdKey(type)] = calendarId
+        }
+    }
+
+    /**
+     * The title template per type ("{name}'s birthday"); an empty string means
+     * unset, so the settings screen can seed the localized default. `{name}` is
+     * the contact name, `{age}` the age at the upcoming date (empty when the
+     * birth year is unknown or [specialDatesShowAge] is off).
+     */
+    val specialDatesTitleTemplates: Flow<Map<SpecialDateType, String>> = store.data.map { prefs ->
+        SpecialDateType.entries.associateWith { prefs[titleTemplateKey(it)].orEmpty() }
+    }
+
+    suspend fun setSpecialDatesTitleTemplate(type: SpecialDateType, template: String) {
+        store.edit { it[titleTemplateKey(type)] = template }
+    }
+
+    /** Whether `{year}` resolves in the title (only meaningful when the year is known). Default ON. */
+    val specialDatesShowYear: Flow<Boolean> = store.data.map { it[SPECIAL_DATES_SHOW_YEAR_KEY] ?: true }
+
+    suspend fun setSpecialDatesShowYear(enabled: Boolean) {
+        store.edit { it[SPECIAL_DATES_SHOW_YEAR_KEY] = enabled }
+    }
+
+    /** Outcome of the last mirror sync, for the settings status line. */
+    val specialDatesStatus: Flow<SpecialDatesStatus> = store.data.map { prefs ->
+        SpecialDatesStatus(
+            lastRun = prefs[SPECIAL_DATES_LAST_RUN_KEY] ?: 0L,
+            stalled = prefs[SPECIAL_DATES_STALLED_KEY]
+                ?.let { name -> SpecialDatesStalledReason.entries.firstOrNull { it.name == name } },
+        )
+    }
+
+    /** Record a sync outcome; [stalled] non-null marks the feature paused (e.g. permission revoked). */
+    suspend fun recordSpecialDatesRun(atMillis: Long, stalled: SpecialDatesStalledReason?) {
+        store.edit { prefs ->
+            prefs[SPECIAL_DATES_LAST_RUN_KEY] = atMillis
+            if (stalled == null) prefs.remove(SPECIAL_DATES_STALLED_KEY) else prefs[SPECIAL_DATES_STALLED_KEY] = stalled.name
+        }
+    }
+
+    /** Epoch millis of the last foreground-triggered sync, to debounce ON_RESUME. */
+    val specialDatesLastForegroundSync: Flow<Long> =
+        store.data.map { it[SPECIAL_DATES_LAST_FG_SYNC_KEY] ?: 0L }
+
+    suspend fun setSpecialDatesLastForegroundSync(atMillis: Long) {
+        store.edit { it[SPECIAL_DATES_LAST_FG_SYNC_KEY] = atMillis }
+    }
+
+    private fun typeEnabledKey(type: SpecialDateType) =
+        booleanPreferencesKey("special_dates_type_${type.name}")
+
+    private fun calendarIdKey(type: SpecialDateType) =
+        longPreferencesKey("special_dates_calendar_${type.name}")
+
+    private fun titleTemplateKey(type: SpecialDateType) =
+        stringPreferencesKey("special_dates_title_${type.name}")
+
     private fun parseFormFields(stored: String?): Set<EventFormField> = when (stored) {
         null -> DEFAULT_FORM_FIELDS
         else -> stored.split(',')
@@ -605,9 +695,30 @@ class SettingsPrefs @Inject constructor(
         const val DEFAULT_BACKUP_INTERVAL = 1_440L
         /** Floor for the automatic-backup interval (also above WorkManager's 15-min limit). */
         const val MIN_BACKUP_INTERVAL = 30L
+
+        internal val SPECIAL_DATES_ENABLED_KEY = booleanPreferencesKey("special_dates_enabled")
+        internal val SPECIAL_DATES_SHOW_YEAR_KEY = booleanPreferencesKey("special_dates_show_year")
+        internal val SPECIAL_DATES_LAST_RUN_KEY = longPreferencesKey("special_dates_last_run")
+        internal val SPECIAL_DATES_STALLED_KEY = stringPreferencesKey("special_dates_stalled_reason")
+        internal val SPECIAL_DATES_LAST_FG_SYNC_KEY =
+            longPreferencesKey("special_dates_last_foreground_sync")
     }
 }
 
+/** Snapshot of the special-dates mirror's last outcome (see [SettingsPrefs.specialDatesStatus]). */
+data class SpecialDatesStatus(
+    /** Epoch millis of the last sync, or 0 if it has never run. */
+    val lastRun: Long,
+    /** Non-null when the mirror is paused and why; null when healthy. */
+    val stalled: SpecialDatesStalledReason?,
+)
+
+/** Why the special-dates mirror is paused. */
+enum class SpecialDatesStalledReason {
+    /** READ_CONTACTS was revoked in system settings after the feature was enabled. */
+    PermissionRevoked,
+}
+
 /** Snapshot of the automatic backup's last outcome (see [SettingsPrefs.autoBackupStatus]). */
 data class BackupStatus(
     /** Epoch millis of the last run, or 0 if it has never run. */
@@ -626,6 +737,18 @@ sealed interface CalendarReminderOverride {
     data class Minutes(val minutes: List<Int>) : CalendarReminderOverride
 }
 
+/**
+ * The stored override for [calendarId] in an override map, as a
+ * [CalendarReminderOverride] (absent → [CalendarReminderOverride.Inherit],
+ * empty → [CalendarReminderOverride.None]) — the inverse of how
+ * [SettingsPrefs.setCalendarReminderOverride] stores a choice.
+ */
+fun Map<Long, List<Int>>.choiceFor(calendarId: Long): CalendarReminderOverride = when {
+    !containsKey(calendarId) -> CalendarReminderOverride.Inherit
+    getValue(calendarId).isEmpty() -> CalendarReminderOverride.None
+    else -> CalendarReminderOverride.Minutes(getValue(calendarId))
+}
+
 /**
  * The lead times to prefill on a new event: the matching per-calendar override
  * if [calendarId] has one for this event kind, otherwise the global default for

app/src/main/java/de/jeanlucmakiola/calendula/domain/InsertEventForm.kt

@@ -0,0 +1,76 @@
+package de.jeanlucmakiola.calendula.domain
+
+import kotlinx.datetime.LocalDate
+import kotlinx.datetime.LocalDateTime
+import kotlinx.datetime.LocalTime
+import kotlinx.datetime.TimeZone
+import kotlinx.datetime.toInstant
+import kotlinx.datetime.toLocalDateTime
+import kotlin.time.Duration.Companion.hours
+import kotlin.time.Instant
+
+/**
+ * Build a prefilled [EventForm] from an `ACTION_INSERT` intent's extras (issue
+ * #30). External apps and widgets (e.g. the Todo Agenda widget) launch the
+ * calendar this way to create a new event, passing the fields as
+ * [android.provider.CalendarContract] extras. Any field the intent omits falls
+ * back to the same defaults the in-app "new event" uses — a timed start at the
+ * next full hour and a one-hour duration. [EventForm.calendarId] is left null so
+ * it resolves to the last-used / first-writable calendar, exactly like the
+ * `.ics` single-event and plain new-event paths.
+ *
+ * Pure (no Android types) so it is unit-testable; the intent parsing that reads
+ * the extras lives in `MainActivity.insertFormOrNull`.
+ */
+fun buildInsertEventForm(
+    beginMillis: Long?,
+    endMillis: Long?,
+    isAllDay: Boolean,
+    title: String?,
+    description: String?,
+    location: String?,
+    rrule: String?,
+    zone: TimeZone,
+    now: Instant,
+): EventForm {
+    val (start, end) = if (isAllDay) {
+        // All-day provider times are UTC midnights with an exclusive end; show
+        // the last covered day and keep placeholder wall-clock times in case the
+        // user switches the event to timed (mirrors EventDetail.toEditForm).
+        val startDate = beginMillis
+            ?.let { Instant.fromEpochMilliseconds(it).toLocalDateTime(TimeZone.UTC).date }
+            ?: now.toLocalDateTime(zone).date
+        val endDate = endMillis
+            ?.let { Instant.fromEpochMilliseconds(it).toLocalDateTime(TimeZone.UTC).date }
+            ?.let { exclusive -> maxOf(startDate, LocalDate.fromEpochDays(exclusive.toEpochDays() - 1)) }
+            ?: startDate
+        LocalDateTime(startDate, LocalTime(9, 0)) to LocalDateTime(endDate, LocalTime(10, 0))
+    } else {
+        val startTime = beginMillis
+            ?.let { Instant.fromEpochMilliseconds(it).toLocalDateTime(zone) }
+            ?: nextFullHour(now, zone)
+        val endTime = endMillis
+            ?.let { Instant.fromEpochMilliseconds(it).toLocalDateTime(zone) }
+            ?.takeIf { it >= startTime }
+            ?: (startTime.toInstant(zone) + 1.hours).toLocalDateTime(zone)
+        startTime to endTime
+    }
+    return EventForm(
+        calendarId = null,
+        title = title.orEmpty(),
+        isAllDay = isAllDay,
+        start = start,
+        end = end,
+        location = location.orEmpty(),
+        description = description.orEmpty(),
+        // Bare RRULE value (Events.RRULE convention); tolerate a leading "RRULE:"
+        // some callers include.
+        rrule = rrule?.removePrefix("RRULE:")?.takeIf { it.isNotBlank() },
+    )
+}
+
+private fun nextFullHour(now: Instant, zone: TimeZone): LocalDateTime {
+    val hourMillis = 3_600_000L
+    val rounded = (now.toEpochMilliseconds() / hourMillis + 1) * hourMillis
+    return Instant.fromEpochMilliseconds(rounded).toLocalDateTime(zone)
+}

app/src/main/java/de/jeanlucmakiola/calendula/domain/Models.kt

@@ -26,6 +26,14 @@ data class CalendarSource(
      * owns for its own calendars). Always null for synced calendars.
      */
     val description: String? = null,
+    /**
+     * A special-dates mirror calendar the app manages (birthdays/anniversaries
+     * from contacts). Its events' title/date/recurrence are owned by the sync,
+     * so it's hidden from the new-event calendar picker and its events lock those
+     * fields in the editor. Recognised by a durable provider marker, so it holds
+     * even after a backup restore clears the app's stored ids.
+     */
+    val isManaged: Boolean = false,
 )
 
 data class EventInstance(

app/src/main/java/de/jeanlucmakiola/calendula/domain/contacts/ContactSpecialDate.kt

@@ -0,0 +1,122 @@
+package de.jeanlucmakiola.calendula.domain.contacts
+
+import java.time.LocalDate
+
+/**
+ * The kinds of contact "special date" Calendula mirrors into local calendars.
+ * Each kind gets its own local calendar, so it inherits per-calendar colour,
+ * visibility and reminder defaults for free. See
+ * docs/design/contact-special-dates.md.
+ */
+enum class SpecialDateType {
+    Birthday,
+    Anniversary,
+
+    /** Everything else — a contact "Event" that is neither birthday nor anniversary. */
+    Custom,
+}
+
+/**
+ * One dated event read from a device contact (a `ContactsContract` `Event`
+ * row). The [lookupKey] is the stable contact identity used to reconcile the
+ * mirror without duplicating; [year] is null when the contact stored the date
+ * without one (`--MM-dd`), in which case age can't be shown.
+ */
+data class ContactSpecialDate(
+    val lookupKey: String,
+    val displayName: String,
+    val type: SpecialDateType,
+    val month: Int,
+    val day: Int,
+    val year: Int?,
+    /** The contact's custom label for a [SpecialDateType.Custom] date, if any. */
+    val label: String? = null,
+)
+
+/** The parsed month/day (+ optional year) of a contact date. */
+data class ContactDateParts(val year: Int?, val month: Int, val day: Int)
+
+/**
+ * A fixed leap year to validate and anchor year-less dates against, so that a
+ * `--02-29` birthday is representable (and, once anchored, only recurs in leap
+ * years — matching how the calendar provider expands a yearly Feb-29 series).
+ */
+const val YEARLESS_ANCHOR_YEAR = 1972
+
+/**
+ * Parse a `ContactsContract.CommonDataKinds.Event.START_DATE` value into its
+ * calendar parts, or null if it isn't a usable date. Handles the three shapes
+ * seen in the wild:
+ * - full `yyyy-MM-dd` (year known),
+ * - year-less `--MM-dd` (year null),
+ * - compact `yyyyMMdd`.
+ *
+ * A date that names an impossible day (e.g. `1999-02-29`) is rejected. Pure, so
+ * it's unit-tested without a device.
+ */
+fun parseContactEventDate(raw: String?): ContactDateParts? {
+    val s = raw?.trim().orEmpty()
+    if (s.isEmpty()) return null
+
+    // Year-less: "--MM-dd" or "--MMdd".
+    if (s.startsWith("--")) {
+        val (m, d) = parseMonthDay(s.substring(2)) ?: return null
+        return validated(null, m, d)
+    }
+
+    if (s.contains('-')) {
+        val parts = s.split('-').filter { it.isNotEmpty() }
+        return when (parts.size) {
+            // "yyyy-MM-dd" — but a leading '-' would have dropped the empty
+            // first part, so require the first token to look like a year.
+            3 -> if (s.startsWith('-')) null else validated(
+                year = parts[0].toIntOrNull() ?: return null,
+                month = parts[1].toIntOrNull() ?: return null,
+                day = parts[2].toIntOrNull() ?: return null,
+            )
+            // Year-less "MM-dd" without the "--" prefix.
+            2 -> validated(
+                year = null,
+                month = parts[0].toIntOrNull() ?: return null,
+                day = parts[1].toIntOrNull() ?: return null,
+            )
+            else -> null
+        }
+    }
+
+    // Compact "yyyyMMdd".
+    if (s.length == 8 && s.all { it.isDigit() }) {
+        return validated(
+            year = s.substring(0, 4).toInt(),
+            month = s.substring(4, 6).toInt(),
+            day = s.substring(6, 8).toInt(),
+        )
+    }
+
+    return null
+}
+
+/** "MM-dd" or compact "MMdd". */
+private fun parseMonthDay(rest: String): Pair<Int, Int>? {
+    if (rest.contains('-')) {
+        val p = rest.split('-').filter { it.isNotEmpty() }
+        if (p.size != 2) return null
+        return (p[0].toIntOrNull() ?: return null) to (p[1].toIntOrNull() ?: return null)
+    }
+    if (rest.length == 4 && rest.all { it.isDigit() }) {
+        return rest.substring(0, 2).toInt() to rest.substring(2, 4).toInt()
+    }
+    return null
+}
+
+/**
+ * Confirm month/day form a real calendar date (validated against the actual
+ * year when known, otherwise the leap anchor so `02-29` survives).
+ */
+private fun validated(year: Int?, month: Int, day: Int): ContactDateParts? {
+    if (month !in 1..12 || day !in 1..31) return null
+    val checkYear = year ?: YEARLESS_ANCHOR_YEAR
+    return runCatching { LocalDate.of(checkYear, month, day) }
+        .map { ContactDateParts(year, month, day) }
+        .getOrNull()
+}

app/src/main/java/de/jeanlucmakiola/calendula/domain/contacts/SpecialDateFormatting.kt

@@ -0,0 +1,65 @@
+package de.jeanlucmakiola.calendula.domain.contacts
+
+import kotlinx.datetime.LocalDate
+
+/**
+ * Prefix of every managed-event `UID_2445`. Distinguishes mirror events from
+ * user-created ones (which carry a random `<uuid>@calendula` UID), so the sync
+ * only ever reconciles — and never deletes — events it actually owns.
+ */
+const val MANAGED_UID_PREFIX = "contact-"
+
+/**
+ * The deterministic `Events.UID_2445` that ties a mirrored event to its source
+ * contact date. Stable across syncs (the reconciliation key), namespaced by
+ * type so the same contact's birthday and anniversary never collide, and — when
+ * a [discriminator] is given — by it too, so two Custom dates on one contact
+ * (e.g. "Wedding" and "Graduation") get distinct events instead of clobbering
+ * each other.
+ */
+fun managedEventUid(type: SpecialDateType, lookupKey: String, discriminator: String? = null): String {
+    val disc = discriminator?.takeIf { it.isNotBlank() }?.let { ":$it" }.orEmpty()
+    return "$MANAGED_UID_PREFIX${type.name.lowercase()}:$lookupKey$disc@calendula"
+}
+
+/**
+ * The reconciliation key for this date's mirrored event. Birthdays/anniversaries
+ * are one-per-contact, so they key on the contact alone; a [SpecialDateType.Custom]
+ * date adds a discriminator (its label, else its month-day) so distinct custom
+ * dates on one contact don't collapse into a single event.
+ */
+fun ContactSpecialDate.managedUid(): String =
+    managedEventUid(type, lookupKey, customDiscriminator())
+
+private fun ContactSpecialDate.customDiscriminator(): String? =
+    if (type == SpecialDateType.Custom) {
+        label?.trim()?.lowercase()?.ifBlank { null } ?: "%02d-%02d".format(month, day)
+    } else {
+        null
+    }
+
+/**
+ * The all-day date the recurring `FREQ=YEARLY` series is anchored at: the real
+ * date when the year is known (so age can be derived), otherwise the month/day
+ * on a fixed leap anchor year so a `--02-29` date stays representable and the
+ * anchor never drifts between syncs.
+ */
+fun ContactSpecialDate.anchorDate(): LocalDate =
+    LocalDate(year ?: YEARLESS_ANCHOR_YEAR, month, day)
+
+/**
+ * Render a title [template] for a contact, substituting `{name}` and `{year}`
+ * (the source year — a birthday's birth year or an anniversary's start year;
+ * empty when [year] is null). Unlike an age, the year is static and correct on
+ * every occurrence of the yearly event. Collapses the whitespace an empty
+ * `{year}` may leave behind, so "{name}'s birthday ({year})" degrades cleanly to
+ * "Jane's birthday" when no year is known.
+ */
+fun renderSpecialDateTitle(template: String, name: String, year: Int?): String =
+    template
+        .replace("{name}", name)
+        .replace("{year}", year?.toString().orEmpty())
+        // Drop an empty "()" left by an unresolved {year}, then tidy spacing.
+        .replace(Regex("""\(\s*\)"""), "")
+        .replace(Regex("""\s+"""), " ")
+        .trim()

app/src/main/java/de/jeanlucmakiola/calendula/ui/CalendarHost.kt

@@ -72,6 +72,8 @@ fun CalendarHost(
     onWidgetNavConsumed: () -> Unit = {},
     requestedImportUri: android.net.Uri? = null,
     onImportConsumed: () -> Unit = {},
+    requestedInsertForm: EventForm? = null,
+    onInsertConsumed: () -> Unit = {},
     viewModel: CalendarHostViewModel = hiltViewModel(),
 ) {
     // Wait for the persisted default view before seeding the stack, so the app
@@ -176,6 +178,16 @@ fun CalendarHost(
             onImportConsumed()
         }
     }
+    // An external ACTION_INSERT launch (another app/widget creating an event,
+    // issue #30) arrives already prefilled — open it in the same create form the
+    // single-event .ics path uses. [importForm] is the topmost overlay, so it
+    // reveals on top of whatever was open without extra dismissal.
+    LaunchedEffect(requestedInsertForm) {
+        if (requestedInsertForm != null) {
+            importForm = requestedInsertForm
+            onInsertConsumed()
+        }
+    }
 
     // Close every overlay that can sit over the calendar, so an externally
     // requested destination (a widget/shortcut/QS-tile launch) is revealed on
@@ -272,6 +284,7 @@ fun CalendarHost(
                 CalendarView.Week -> WeekScreen(
                     selectedView = currentView,
                     onSelectView = onSelectView,
+                    onOpenDay = onOpenDay,
                     onEventClick = onEventClick,
                     onOpenSettings = onOpenSettings,
                     onOpenSearch = onOpenSearch,
@@ -303,6 +316,7 @@ fun CalendarHost(
                 CalendarView.Agenda -> AgendaScreen(
                     selectedView = currentView,
                     onSelectView = onSelectView,
+                    onOpenDay = onOpenDay,
                     onEventClick = onEventClick,
                     onOpenSettings = onOpenSettings,
                     onOpenSearch = onOpenSearch,

app/src/main/java/de/jeanlucmakiola/calendula/ui/RootScreen.kt

@@ -19,6 +19,8 @@ import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.core.content.ContextCompat
 import androidx.lifecycle.Lifecycle
 import androidx.lifecycle.LifecycleEventObserver
+import de.jeanlucmakiola.calendula.data.contacts.SpecialDatesScheduler
+import de.jeanlucmakiola.calendula.data.contacts.hasContactsPermission
 import de.jeanlucmakiola.calendula.ui.permission.PermissionScreen
 import de.jeanlucmakiola.calendula.ui.permission.ReminderOnboardingScreen
 import de.jeanlucmakiola.calendula.ui.permission.ReminderOnboardingViewModel
@@ -33,6 +35,8 @@ fun RootScreen(
     onWidgetNavConsumed: () -> Unit = {},
     requestedImportUri: android.net.Uri? = null,
     onImportConsumed: () -> Unit = {},
+    requestedInsertForm: de.jeanlucmakiola.calendula.domain.EventForm? = null,
+    onInsertConsumed: () -> Unit = {},
 ) {
     val context = LocalContext.current
     var hasPermission by remember {
@@ -49,6 +53,12 @@ fun RootScreen(
                 hasPermission = ContextCompat.checkSelfPermission(
                     context, Manifest.permission.READ_CALENDAR
                 ) == PackageManager.PERMISSION_GRANTED
+                // Refresh the contact special-dates mirror on foreground (the
+                // worker is debounced and no-ops when the feature is off). Gated
+                // on the permission so users without the opt-in never enqueue it.
+                if (context.hasContactsPermission()) {
+                    SpecialDatesScheduler.runNow(context, foreground = true)
+                }
             }
         }
         lifecycle.addObserver(obs)
@@ -76,6 +86,8 @@ fun RootScreen(
                         onWidgetNavConsumed = onWidgetNavConsumed,
                         requestedImportUri = requestedImportUri,
                         onImportConsumed = onImportConsumed,
+                        requestedInsertForm = requestedInsertForm,
+                        onInsertConsumed = onInsertConsumed,
                     )
                     false -> ReminderOnboardingScreen(
                         onFinished = reminderOnboarding::finish,

app/src/main/java/de/jeanlucmakiola/calendula/ui/agenda/AgendaScreen.kt

@@ -93,6 +93,7 @@ private val zone = TimeZone.currentSystemDefault()
 fun AgendaScreen(
     selectedView: CalendarView,
     onSelectView: (CalendarView) -> Unit,
+    onOpenDay: (LocalDate) -> Unit,
     onEventClick: (EventInstance) -> Unit,
     onOpenSettings: () -> Unit,
     onOpenSearch: () -> Unit,
@@ -191,6 +192,7 @@ fun AgendaScreen(
                     pastDisplay = pastDisplay,
                     onRetry = viewModel::goToToday,
                     onEventClick = onEventClick,
+                    onOpenDay = onOpenDay,
                     modifier = Modifier
                         .weight(1f)
                         .fillMaxWidth(),
@@ -289,6 +291,7 @@ private fun AgendaContent(
     pastDisplay: PastEventDisplay,
     onRetry: () -> Unit,
     onEventClick: (EventInstance) -> Unit,
+    onOpenDay: (LocalDate) -> Unit,
     modifier: Modifier = Modifier,
 ) {
     when (state) {
@@ -318,6 +321,7 @@ private fun AgendaContent(
                     dimPast = pastDisplay == PastEventDisplay.DIM,
                     now = now,
                     onEventClick = onEventClick,
+                    onOpenDay = onOpenDay,
                     modifier = modifier,
                 )
             }
@@ -333,6 +337,7 @@ private fun AgendaList(
     dimPast: Boolean,
     now: Instant,
     onEventClick: (EventInstance) -> Unit,
+    onOpenDay: (LocalDate) -> Unit,
     modifier: Modifier = Modifier,
 ) {
     LazyColumn(
@@ -342,7 +347,7 @@ private fun AgendaList(
     ) {
         days.forEach { day ->
             stickyHeader(key = "header-${day.date}") {
-                AgendaDayHeader(date = day.date, today = today)
+                AgendaDayHeader(date = day.date, today = today, onOpenDay = onOpenDay)
             }
             itemsIndexed(
                 items = day.events,
@@ -362,10 +367,16 @@ private fun AgendaList(
 }
 
 @Composable
-private fun AgendaDayHeader(date: LocalDate, today: LocalDate) {
+private fun AgendaDayHeader(
+    date: LocalDate,
+    today: LocalDate,
+    onOpenDay: (LocalDate) -> Unit,
+) {
     Surface(
         color = MaterialTheme.colorScheme.surface,
-        modifier = Modifier.fillMaxWidth(),
+        modifier = Modifier
+            .fillMaxWidth()
+            .clickable { onOpenDay(date) },
     ) {
         Text(
             text = agendaDayLabel(date, today),

app/src/main/java/de/jeanlucmakiola/calendula/ui/calendars/CalendarsScreen.kt

@@ -94,7 +94,7 @@ import de.jeanlucmakiola.calendula.R
 import de.jeanlucmakiola.calendula.data.prefs.BackupStatus
 import de.jeanlucmakiola.calendula.data.prefs.SettingsPrefs
 import de.jeanlucmakiola.calendula.domain.CalendarSource
-import de.jeanlucmakiola.calendula.ui.common.CALENDAR_COLOR_PALETTE
+import de.jeanlucmakiola.calendula.data.calendar.CalendarColorPalette
 import de.jeanlucmakiola.calendula.ui.common.CalendarColorChip
 import de.jeanlucmakiola.calendula.ui.common.DialogAmountField
 import de.jeanlucmakiola.calendula.ui.common.DialogUnitDropdown
@@ -142,7 +142,7 @@ fun CalendarsScreen(
             sessionKey = editorSession,
             isNew = editorId == NEW_CALENDAR_ID,
             initialName = editing?.displayName.orEmpty(),
-            initialColor = editing?.color ?: CALENDAR_COLOR_PALETTE.first(),
+            initialColor = editing?.color ?: CalendarColorPalette.all.first(),
             initialDescription = editing?.description.orEmpty(),
             onSave = { name, color, description ->
                 val id = editorId
@@ -507,7 +507,7 @@ private fun CalendarEditor(
                 )
                 Spacer(Modifier.height(12.dp))
                 ColorSwatchRow(
-                    colors = CALENDAR_COLOR_PALETTE,
+                    colors = CalendarColorPalette.all,
                     selected = color,
                     onSelect = { color = it },
                     dark = dark,

app/src/main/java/de/jeanlucmakiola/calendula/ui/common/ColorSwatchRow.kt

@@ -67,16 +67,3 @@ fun ColorSwatchRow(
         }
     }
 }
-
-/** Google-Calendar-style palette; ARGB ints for a raw `CALENDAR_COLOR` / `EVENT_COLOR`. */
-val CALENDAR_COLOR_PALETTE: List<Int> = listOf(
-    0xFFD50000, // red
-    0xFFE67C00, // orange
-    0xFFF6BF26, // amber
-    0xFF33B679, // green
-    0xFF0B8043, // dark green
-    0xFF039BE5, // blue
-    0xFF3F51B5, // indigo
-    0xFF8E24AA, // purple
-    0xFF616161, // graphite
-).map { it.toInt() }

app/src/main/java/de/jeanlucmakiola/calendula/ui/common/InlineTextField.kt

@@ -36,6 +36,7 @@ fun InlineTextField(
     textStyle: TextStyle = MaterialTheme.typography.titleMedium,
     singleLine: Boolean = true,
     minLines: Int = 1,
+    enabled: Boolean = true,
     keyboardType: KeyboardType = KeyboardType.Text,
     capitalization: KeyboardCapitalization = KeyboardCapitalization.None,
     imeAction: ImeAction = ImeAction.Default,
@@ -43,15 +44,17 @@ fun InlineTextField(
     onImeAction: (() -> Unit)? = null,
 ) {
     val resolvedStyle = textStyle.copy(
-        color = if (textStyle.color.isSpecified) {
+        color = when {
-            textStyle.color
+            // A disabled field reads as dimmed, like a locked value.
-        } else {
+            !enabled -> MaterialTheme.colorScheme.onSurfaceVariant
-            MaterialTheme.colorScheme.onSurface
+            textStyle.color.isSpecified -> textStyle.color
+            else -> MaterialTheme.colorScheme.onSurface
         },
     )
     BasicTextField(
         value = value,
         onValueChange = onValueChange,
+        enabled = enabled,
         textStyle = resolvedStyle,
         singleLine = singleLine,
         minLines = minLines,

app/src/main/java/de/jeanlucmakiola/calendula/ui/common/TimePickerAlert.kt

@@ -4,14 +4,9 @@ import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.Text
 import androidx.compose.material3.TextButton
-import android.content.Context
-import android.content.res.Resources
-import android.provider.Settings
-import android.text.format.DateFormat
 import androidx.compose.material3.TimePicker
 import androidx.compose.material3.rememberTimePickerState
 import androidx.compose.runtime.Composable
-import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import de.jeanlucmakiola.calendula.R
 import kotlinx.datetime.LocalTime
@@ -27,10 +22,13 @@ fun TimePickerAlert(
     onConfirm: (LocalTime) -> Unit,
     onDismiss: () -> Unit,
 ) {
+    // Honour the app's own time-format preference (the value every time label
+    // reads), not the system/locale clock — otherwise an explicit 24h setting
+    // still showed an AM/PM dial (issue #27).
     val state = rememberTimePickerState(
         initialHour = initial.hour,
         initialMinute = initial.minute,
-        is24Hour = deviceUses24HourClock(LocalContext.current),
+        is24Hour = LocalUse24HourFormat.current,
     )
     AlertDialog(
         onDismissRequest = onDismiss,
@@ -45,24 +43,3 @@ fun TimePickerAlert(
         text = { TimePicker(state = state) },
     )
 }
-
-/**
- * Whether the clock should read 24-hour, matching the rest of the device.
- *
- * [DateFormat.is24HourFormat] resolves a "locale default" system setting against
- * the *app's* context locale — and this app applies a per-app language
- * (AppCompatDelegate), so an English UI on a German-region phone would wrongly
- * read 12-hour while the system clock shows 24-hour. So we honour an explicit
- * system 12/24 override, and otherwise fall back to the **device** locale
- * (Resources.getSystem), not the app's.
- */
-private fun deviceUses24HourClock(context: Context): Boolean =
-    when (Settings.System.getString(context.contentResolver, Settings.System.TIME_12_24)) {
-        "24" -> true
-        "12" -> false
-        // 'a' is the AM/PM marker; a best-fit pattern without it is 24-hour.
-        else -> {
-            val deviceLocale = Resources.getSystem().configuration.locales[0]
-            !DateFormat.getBestDateTimePattern(deviceLocale, "jm").contains('a')
-        }
-    }

app/src/main/java/de/jeanlucmakiola/calendula/ui/detail/EventDetailScreen.kt

@@ -250,6 +250,9 @@ fun EventDetailScreen(
                                 contentDescription = stringResource(R.string.event_detail_edit),
                             )
                         }
+                        // Managed special-dates events have no delete — the sync
+                        // would resurrect them; the date is removed at the contact.
+                        if (!s.isManaged) {
                             IconButton(
                                 onClick = onDeleteClick,
                                 enabled = deleteState != DeleteUiState.Deleting,
@@ -260,6 +263,7 @@ fun EventDetailScreen(
                                 )
                             }
                         }
+                    }
                 },
                 colors = TopAppBarDefaults.topAppBarColors(
                     containerColor = MaterialTheme.colorScheme.surface,

app/src/main/java/de/jeanlucmakiola/calendula/ui/detail/EventDetailUiState.kt

@@ -15,6 +15,12 @@ sealed interface EventDetailUiState {
         val calendarName: String?,
         /** Whether the owning calendar allows modifying events (shows edit/delete). */
         val canModify: Boolean = false,
+        /**
+         * The event belongs to a managed special-dates calendar: its editable
+         * fields (reminders, notes) can still be edited, but delete is hidden —
+         * the sync would just resurrect it. Contact dates are removed at the source.
+         */
+        val isManaged: Boolean = false,
     ) : EventDetailUiState
 }
 

app/src/main/java/de/jeanlucmakiola/calendula/ui/detail/EventDetailViewModel.kt

@@ -154,6 +154,7 @@ class EventDetailViewModel @Inject constructor(
             detail = corrected,
             calendarName = calendar?.displayName,
             canModify = calendar?.canModifyContents == true,
+            isManaged = calendar?.isManaged == true,
         )
     } catch (e: CancellationException) {
         throw e

app/src/main/java/de/jeanlucmakiola/calendula/ui/edit/EventEditScreen.kt

@@ -120,7 +120,7 @@ import de.jeanlucmakiola.calendula.domain.toRRule
 import de.jeanlucmakiola.calendula.ui.common.calendarCollapseExit
 import de.jeanlucmakiola.calendula.ui.common.calendarExpandEnter
 import de.jeanlucmakiola.calendula.ui.common.predictiveBack
-import de.jeanlucmakiola.calendula.ui.common.CALENDAR_COLOR_PALETTE
+import de.jeanlucmakiola.calendula.data.calendar.CalendarColorPalette
 import de.jeanlucmakiola.calendula.ui.common.CalendarColorChip
 import de.jeanlucmakiola.calendula.ui.common.CalendarDatePickerDialog
 import de.jeanlucmakiola.calendula.ui.common.ColorSwatchRow
@@ -439,6 +439,10 @@ private fun EventEditContent(
     val form = state.form
     val locale = currentLocale()
     val dark = isSystemInDarkTheme()
+    // The title, date and recurrence are managed by the special-dates sync, so
+    // they're locked here; everything else (reminders, location, notes) is the
+    // user's to edit.
+    val locked = state.isManaged
     var picker by remember { mutableStateOf<PickerTarget?>(null) }
     var showCalendarPicker by rememberSaveable { mutableStateOf(false) }
     var showReminderPicker by rememberSaveable { mutableStateOf(false) }
@@ -523,6 +527,7 @@ private fun EventEditContent(
             placeholder = stringResource(R.string.event_edit_title_hint),
             textStyle = MaterialTheme.typography.headlineMedium
                 .copy(fontWeight = FontWeight.SemiBold),
+            enabled = !locked,
             modifier = Modifier
                 .fillMaxWidth()
                 .padding(vertical = 4.dp)
@@ -535,6 +540,17 @@ private fun EventEditContent(
                 .height(3.dp)
                 .background(accent, RoundedCornerShape(2.dp)),
         )
+        if (locked) {
+            Spacer(Modifier.height(10.dp))
+            Text(
+                text = stringResource(
+                    R.string.event_edit_managed_hint,
+                    selectedCalendar?.displayName.orEmpty(),
+                ),
+                style = MaterialTheme.typography.bodySmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+            )
+        }
 
         Spacer(Modifier.height(20.dp))
 
@@ -553,7 +569,11 @@ private fun EventEditContent(
                         style = MaterialTheme.typography.titleMedium,
                         modifier = Modifier.weight(1f),
                     )
-                    Switch(checked = form.isAllDay, onCheckedChange = viewModel::setAllDay)
+                    Switch(
+                        checked = form.isAllDay,
+                        onCheckedChange = viewModel::setAllDay,
+                        enabled = !locked,
+                    )
                 }
             },
         ) {
@@ -565,6 +585,7 @@ private fun EventEditContent(
                 locale = locale,
                 onDateClick = { picker = PickerTarget.StartDate },
                 onTimeClick = { picker = PickerTarget.StartTime },
+                enabled = !locked,
             )
             ScheduleRow(
                 label = stringResource(R.string.event_edit_ends),
@@ -574,6 +595,7 @@ private fun EventEditContent(
                 onDateClick = { picker = PickerTarget.EndDate },
                 onTimeClick = { picker = PickerTarget.EndTime },
                 isError = EventFormProblem.EndBeforeStart in state.problems,
+                enabled = !locked,
             )
             if (EventFormProblem.EndBeforeStart in state.problems) {
                 Spacer(Modifier.height(2.dp))
@@ -704,7 +726,7 @@ private fun EventEditContent(
             EditCard(
                 icon = Icons.Default.Repeat,
                 iconContentDescription = null,
-                onClick = { showRecurrencePicker = true },
+                onClick = if (locked) null else ({ showRecurrencePicker = true }),
             ) {
                 Row(
                     verticalAlignment = Alignment.CenterVertically,
@@ -1727,7 +1749,7 @@ private fun ColorPickerDialog(
                     )
                 } else {
                     ColorSwatchRow(
-                        colors = CALENDAR_COLOR_PALETTE,
+                        colors = CalendarColorPalette.all,
                         selected = selected,
                         onSelect = onPickRaw,
                         dark = dark,
@@ -1862,6 +1884,7 @@ private fun InlineField(
     textStyle: TextStyle = MaterialTheme.typography.titleMedium,
     singleLine: Boolean = true,
     minLines: Int = 1,
+    enabled: Boolean = true,
     keyboardType: KeyboardType = KeyboardType.Text,
     modifier: Modifier = Modifier
         .fillMaxWidth()
@@ -1875,6 +1898,7 @@ private fun InlineField(
         textStyle = textStyle,
         singleLine = singleLine,
         minLines = minLines,
+        enabled = enabled,
         keyboardType = keyboardType,
     )
 }
@@ -1889,6 +1913,7 @@ private fun ScheduleRow(
     onDateClick: () -> Unit,
     onTimeClick: () -> Unit,
     isError: Boolean = false,
+    enabled: Boolean = true,
 ) {
     val dateFormat = remember(locale) {
         DateTimeFormatter.ofLocalizedDate(FormatStyle.MEDIUM).withLocale(locale)
@@ -1898,11 +1923,12 @@ private fun ScheduleRow(
         timeOfDayFormatter(use24Hour, locale)
     }
     // Tappable values read as links (primary), like the location on the
-    // detail screen; errors flip them to the error colour.
+    // detail screen; errors flip them to the error colour; a locked (managed)
-    val valueColor = if (isError) {
+    // row dims to a plain, non-tappable value.
-        MaterialTheme.colorScheme.error
+    val valueColor = when {
-    } else {
+        !enabled -> MaterialTheme.colorScheme.onSurfaceVariant
-        MaterialTheme.colorScheme.primary
+        isError -> MaterialTheme.colorScheme.error
+        else -> MaterialTheme.colorScheme.primary
     }
     Row(
         verticalAlignment = Alignment.CenterVertically,
@@ -1919,7 +1945,7 @@ private fun ScheduleRow(
             style = MaterialTheme.typography.titleMedium,
             color = valueColor,
             modifier = Modifier
-                .clickable(onClick = onDateClick)
+                .clickable(enabled = enabled, onClick = onDateClick)
                 .padding(vertical = 8.dp, horizontal = 6.dp),
         )
         if (!isAllDay) {
@@ -1928,7 +1954,7 @@ private fun ScheduleRow(
                 style = MaterialTheme.typography.titleMedium,
                 color = valueColor,
                 modifier = Modifier
-                    .clickable(onClick = onTimeClick)
+                    .clickable(enabled = enabled, onClick = onTimeClick)
                     .padding(vertical = 8.dp, horizontal = 6.dp),
             )
         }

app/src/main/java/de/jeanlucmakiola/calendula/ui/edit/EventEditUiState.kt

@@ -29,6 +29,12 @@ data class EventEditUiState(
     val hiddenFields: List<EventFormField> = emptyList(),
     /** True while editing an existing event (the calendar is then fixed). */
     val isEditing: Boolean = false,
+    /**
+     * True when the event's calendar is a contact special-dates calendar the app
+     * manages. While editing such an event the title, date and recurrence are
+     * locked (sync overwrites them); reminders, location and notes stay editable.
+     */
+    val isManaged: Boolean = false,
     /**
      * Whether to focus the title and raise the keyboard when this is a fresh
      * create form (issue #10). Mirrors the settings flag; the screen only acts

app/src/main/java/de/jeanlucmakiola/calendula/ui/edit/EventEditViewModel.kt

@@ -122,18 +122,24 @@ class EventEditViewModel @Inject constructor(
         val autofocusTitle: Boolean,
     )
 
+    /** Every calendar the provider exposes; the source for both lists below. */
+    private val allCalendars: Flow<List<CalendarSource>> =
+        repository.calendars().catch { emit(emptyList()) }
+
     /**
      * Writable calendars — the only valid event targets. Disabled calendars are
      * excluded, so you can't create into a calendar you've removed from the app;
      * a last-used preselect landing on a now-disabled calendar falls back to the
      * first remaining writable one (handled by [resolvedCalendarId] and [state]).
+     * Managed special-dates calendars are excluded too: their events are owned by
+     * the contact sync, which would delete any user event created there.
      */
     private val writableCalendars: Flow<List<CalendarSource>> = combine(
-        repository.calendars(),
+        allCalendars,
         prefs.disabledCalendarIds,
     ) { calendars, disabled ->
-        calendars.filter { it.canModifyContents && it.id !in disabled }
+        calendars.filter { it.canModifyContents && it.id !in disabled && !it.isManaged }
-    }.catch { emit(emptyList()) }
+    }
 
     /** The target calendar id, resolved exactly as the form shows it. */
     private val resolvedCalendarId: Flow<Long?> = combine(
@@ -165,21 +171,33 @@ class EventEditViewModel @Inject constructor(
             ::ExternalInputs,
         ).flowOn(io),
         colorPalette,
-    ) { local, external, palette ->
+        allCalendars,
+    ) { local, external, palette, allCalendars ->
         val form = local.form ?: return@combine null
         val resolvedId = form.calendarId
             ?: external.lastUsed?.takeIf { id -> external.writable.any { it.id == id } }
             ?: external.writable.firstOrNull()?.id
         val resolved = form.copy(calendarId = resolvedId)
+        val resolvedCalendar = allCalendars.firstOrNull { it.id == resolvedId }
+        // Editing an event in a managed calendar locks its synced fields. Keyed
+        // off the calendar's durable marker, not a stored id, so it holds after a
+        // backup restore too.
+        val isManaged = local.editTarget != null && resolvedCalendar?.isManaged == true
+        // The picker offers writable calendars only; when editing a managed event
+        // its own (excluded) calendar is added back so the row still names it.
+        val pickerCalendars =
+            if (isManaged && resolvedCalendar != null) external.writable + resolvedCalendar
+            else external.writable
         val visibleFields = external.defaultFields + local.revealed
         EventEditUiState(
             form = resolved,
-            calendars = external.writable,
+            calendars = pickerCalendars,
             problems = if (local.showProblems) resolved.problems() else emptySet(),
             saveState = local.saveState,
             visibleFields = visibleFields,
             hiddenFields = (EventFormField.entries.toSet() - visibleFields).sorted(),
             isEditing = local.editTarget != null,
+            isManaged = isManaged,
             autofocusTitle = external.autofocusTitle,
             // A modified-occurrence exception can't carry its own rule, so
             // the scope dialog drops "only this event" after a rule change.
@@ -417,7 +435,10 @@ class EventEditViewModel @Inject constructor(
             _saveState.value = SaveUiState.Saved
             return
         }
-        if (target != null && target.original.rrule != null) {
+        // Managed events are a yearly series whose editable fields (reminders,
+        // notes, location) live on the series row — never offer the scope dialog,
+        // which would split the series into an exception the sync then reverts.
+        if (target != null && target.original.rrule != null && !current.isManaged) {
             _saveState.value = SaveUiState.AwaitingScope
             return
         }

app/src/main/java/de/jeanlucmakiola/calendula/ui/settings/SettingsScreen.kt

@@ -39,7 +39,9 @@ import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.KeyboardArrowRight
 import androidx.compose.material.icons.filled.BugReport
+import androidx.compose.material.icons.filled.Cake
 import androidx.compose.material.icons.filled.CalendarMonth
 import androidx.compose.material.icons.filled.Dashboard
 import androidx.compose.material.icons.filled.Check
@@ -91,13 +93,16 @@ import androidx.lifecycle.LifecycleEventObserver
 import androidx.lifecycle.compose.LocalLifecycleOwner
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import de.jeanlucmakiola.calendula.R
+import de.jeanlucmakiola.calendula.data.contacts.hasContactsPermission
 import de.jeanlucmakiola.calendula.data.crash.CrashReporter
 import de.jeanlucmakiola.calendula.data.prefs.CalendarReminderOverride
+import de.jeanlucmakiola.calendula.data.prefs.choiceFor
 import de.jeanlucmakiola.calendula.data.prefs.PastEventDisplay
 import de.jeanlucmakiola.calendula.data.prefs.ThemeMode
 import de.jeanlucmakiola.calendula.data.prefs.TimeFormatPref
 import de.jeanlucmakiola.calendula.data.prefs.WeekStartPref
 import de.jeanlucmakiola.calendula.domain.EventFormField
+import de.jeanlucmakiola.calendula.domain.contacts.SpecialDateType
 import de.jeanlucmakiola.calendula.qs.NewEventTileService
 import de.jeanlucmakiola.calendula.ui.crash.CrashReportDialog
 import de.jeanlucmakiola.calendula.ui.crash.openIssueTracker
@@ -111,6 +116,7 @@ import de.jeanlucmakiola.calendula.ui.common.agendaRangeLabel
 import de.jeanlucmakiola.calendula.ui.common.CalendarView
 import de.jeanlucmakiola.calendula.ui.common.CollapsingScaffold
 import de.jeanlucmakiola.calendula.ui.common.GroupedRow
+import de.jeanlucmakiola.calendula.ui.common.InlineTextField
 import de.jeanlucmakiola.calendula.ui.common.IMPLEMENTED_VIEWS
 import de.jeanlucmakiola.calendula.ui.common.QuickSwitchConfig
 import de.jeanlucmakiola.calendula.ui.common.ReorderableColumn
@@ -139,7 +145,7 @@ import java.time.format.TextStyle as JavaTextStyle
 import java.util.Calendar
 
 /** The settings sub-screens reached from the hub's category rows. */
-private enum class SettingsSection { Appearance, Views, EventForm, Notifications }
+private enum class SettingsSection { Appearance, Views, EventForm, Notifications, SpecialDates }
 
 /**
  * Token-based accent for a leading icon chip (container / on-container pair).
@@ -203,7 +209,19 @@ fun SettingsScreen(
             enter = slideInHorizontally(slideSpec) { it } + fadeIn(),
             exit = slideOutHorizontally(slideSpec) { it } + fadeOut(),
         ) {
-            NotificationsScreen(state = state, viewModel = viewModel, onBack = { section = null })
+            NotificationsScreen(
+                state = state,
+                viewModel = viewModel,
+                onBack = { section = null },
+                onOpenSpecialDates = { section = SettingsSection.SpecialDates },
+            )
+        }
+        AnimatedVisibility(
+            visible = section == SettingsSection.SpecialDates,
+            enter = slideInHorizontally(slideSpec) { it } + fadeIn(),
+            exit = slideOutHorizontally(slideSpec) { it } + fadeOut(),
+        ) {
+            SpecialDatesScreen(viewModel = viewModel, onBack = { section = null })
         }
     }
 }
@@ -257,6 +275,13 @@ private fun SettingsHub(
             leading = { CategoryIcon(Icons.Default.CalendarMonth, ChipAccent.Tertiary) },
             onClick = onManageCalendars,
         )
+        GroupedRow(
+            title = stringResource(R.string.settings_section_special_dates),
+            summary = stringResource(R.string.settings_special_dates_subtitle),
+            position = Position.Middle,
+            leading = { CategoryIcon(Icons.Default.Cake, ChipAccent.Tertiary) },
+            onClick = { onOpenSection(SettingsSection.SpecialDates) },
+        )
         LanguageRow(position = Position.Middle)
         // One-tap add of the "New event" Quick Settings tile. The system prompt
         // is API 33+; on older versions the tile is still addable manually from
@@ -985,6 +1010,7 @@ private fun NotificationsScreen(
     state: SettingsUiState,
     viewModel: SettingsViewModel,
     onBack: () -> Unit,
+    onOpenSpecialDates: () -> Unit,
 ) {
     val context = LocalContext.current
     val launcher = rememberLauncherForActivityResult(
@@ -1109,6 +1135,25 @@ private fun NotificationsScreen(
                 Column {
                     state.writableCalendars.forEach { calendar ->
                         Spacer(Modifier.height(16.dp))
+                        // A contact special-dates calendar owns its reminders in
+                        // its own section — link there instead of an override.
+                        if (calendar.id in state.managedCalendarIds) {
+                            GroupedRow(
+                                title = calendar.displayName,
+                                summary = stringResource(R.string.settings_calendar_reminders_managed_hint),
+                                position = Position.Alone,
+                                leading = { CalendarColorChip(calendar.color) },
+                                trailing = {
+                                    Icon(
+                                        imageVector = Icons.AutoMirrored.Filled.KeyboardArrowRight,
+                                        contentDescription = null,
+                                        tint = MaterialTheme.colorScheme.onSurfaceVariant,
+                                    )
+                                },
+                                onClick = onOpenSpecialDates,
+                            )
+                            return@forEach
+                        }
                         val expanded = calendar.id in expandedCalendars
                         // Calendar card; tapping expands it into a grouped list
                         // of three (the card + the timed and all-day rows).
@@ -1231,6 +1276,287 @@ private fun NotificationsScreen(
     }
 }
 
+// ---------------------------------------------------------------------------
+// Contact special dates (issue #15)
+// ---------------------------------------------------------------------------
+
+@Composable
+private fun SpecialDatesScreen(
+    viewModel: SettingsViewModel,
+    onBack: () -> Unit,
+) {
+    val state by viewModel.specialDatesState.collectAsStateWithLifecycle()
+    val context = LocalContext.current
+
+    // READ_CONTACTS is requested only here, on enable — never at startup. On a
+    // grant we either enable (if turning on) or just re-sync (clearing a stalled
+    // banner after the permission was re-granted).
+    val permissionLauncher = rememberLauncherForActivityResult(
+        contract = ActivityResultContracts.RequestPermission(),
+    ) { granted ->
+        if (granted) {
+            if (!state.enabled) viewModel.setSpecialDatesEnabled(true) else viewModel.syncSpecialDatesNow()
+        }
+    }
+    val requestOrEnable: () -> Unit = {
+        if (context.hasContactsPermission()) {
+            viewModel.setSpecialDatesEnabled(true)
+        } else {
+            permissionLauncher.launch(Manifest.permission.READ_CONTACTS)
+        }
+    }
+
+    var confirmDisableAll by remember { mutableStateOf(false) }
+    var confirmDisableType by remember { mutableStateOf<SpecialDateType?>(null) }
+    var editTemplate by remember { mutableStateOf<SpecialDateType?>(null) }
+    var reminderPickerType by remember { mutableStateOf<SpecialDateType?>(null) }
+
+    CollapsingScaffold(
+        title = stringResource(R.string.settings_section_special_dates),
+        onBack = onBack,
+    ) {
+        // Paused banner: the permission was revoked after enabling.
+        if (state.enabled && state.stalledPermission) {
+            Surface(
+                shape = RoundedCornerShape(16.dp),
+                color = MaterialTheme.colorScheme.errorContainer,
+                modifier = Modifier.fillMaxWidth(),
+            ) {
+                Column(Modifier.padding(16.dp)) {
+                    Text(
+                        text = stringResource(R.string.settings_special_dates_paused_title),
+                        style = MaterialTheme.typography.titleSmall,
+                        color = MaterialTheme.colorScheme.onErrorContainer,
+                    )
+                    Text(
+                        text = stringResource(R.string.settings_special_dates_paused_hint),
+                        style = MaterialTheme.typography.bodyMedium,
+                        color = MaterialTheme.colorScheme.onErrorContainer,
+                    )
+                    Spacer(Modifier.height(8.dp))
+                    FilledTonalButton(
+                        onClick = { permissionLauncher.launch(Manifest.permission.READ_CONTACTS) },
+                    ) { Text(stringResource(R.string.settings_special_dates_grant)) }
+                }
+            }
+            Spacer(Modifier.height(16.dp))
+        }
+
+        GroupedRow(
+            title = stringResource(R.string.settings_special_dates_enable),
+            summary = stringResource(R.string.settings_special_dates_enable_hint),
+            position = Position.Alone,
+            trailing = {
+                Switch(
+                    checked = state.enabled,
+                    onCheckedChange = { want -> if (want) requestOrEnable() else confirmDisableAll = true },
+                )
+            },
+            onClick = { if (state.enabled) confirmDisableAll = true else requestOrEnable() },
+        )
+
+        if (state.enabled) {
+            // Per-type card: the toggle, and while on, its title format and its
+            // calendar-wide reminder.
+            SpecialDateType.entries.forEachIndexed { index, type ->
+                Spacer(Modifier.height(if (index == 0) 24.dp else 16.dp))
+                val on = type in state.types
+                GroupedRow(
+                    title = stringResource(specialDateTypeLabel(type)),
+                    position = if (on) Position.Top else Position.Alone,
+                    trailing = {
+                        Switch(
+                            checked = on,
+                            onCheckedChange = { want ->
+                                if (want) viewModel.setSpecialDateTypeEnabled(type, true)
+                                else confirmDisableType = type
+                            },
+                        )
+                    },
+                    onClick = {
+                        if (on) confirmDisableType = type else viewModel.setSpecialDateTypeEnabled(type, true)
+                    },
+                )
+                if (on) {
+                    GroupedRow(
+                        title = stringResource(R.string.settings_special_dates_template),
+                        summary = state.titleTemplates[type].orEmpty(),
+                        position = Position.Middle,
+                        onClick = { editTemplate = type },
+                    )
+                    GroupedRow(
+                        title = stringResource(R.string.settings_special_dates_reminders),
+                        summary = reminderChoiceLabel(specialDatesReminderMinutes(state.reminderChoices[type])),
+                        position = Position.Bottom,
+                        onClick = { reminderPickerType = type },
+                    )
+                }
+            }
+
+            Spacer(Modifier.height(24.dp))
+            GroupedRow(
+                title = stringResource(R.string.settings_special_dates_show_year),
+                summary = stringResource(R.string.settings_special_dates_show_year_hint),
+                position = Position.Top,
+                trailing = {
+                    Switch(
+                        checked = state.showYear,
+                        onCheckedChange = viewModel::setSpecialDatesShowYear,
+                    )
+                },
+                onClick = { viewModel.setSpecialDatesShowYear(!state.showYear) },
+            )
+            GroupedRow(
+                title = stringResource(R.string.settings_special_dates_sync_now),
+                summary = specialDatesLastRunLabel(context, state.lastRun),
+                position = Position.Bottom,
+                onClick = viewModel::syncSpecialDatesNow,
+            )
+
+            Spacer(Modifier.height(24.dp))
+            Text(
+                text = stringResource(R.string.settings_special_dates_calendar_hint),
+                style = MaterialTheme.typography.bodySmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                modifier = Modifier.padding(horizontal = 16.dp),
+            )
+        }
+    }
+
+    if (confirmDisableAll) {
+        SpecialDatesDisableDialog(
+            message = stringResource(R.string.settings_special_dates_disable_all_message),
+            onConfirm = { viewModel.setSpecialDatesEnabled(false); confirmDisableAll = false },
+            onDismiss = { confirmDisableAll = false },
+        )
+    }
+    confirmDisableType?.let { type ->
+        SpecialDatesDisableDialog(
+            message = stringResource(
+                R.string.settings_special_dates_disable_type_message,
+                stringResource(specialDateTypeLabel(type)),
+            ),
+            onConfirm = { viewModel.setSpecialDateTypeEnabled(type, false); confirmDisableType = null },
+            onDismiss = { confirmDisableType = null },
+        )
+    }
+    editTemplate?.let { type ->
+        SpecialDatesTemplateDialog(
+            initial = state.titleTemplates[type].orEmpty(),
+            onConfirm = { viewModel.setSpecialDatesTitleTemplate(type, it); editTemplate = null },
+            onDismiss = { editTemplate = null },
+        )
+    }
+    reminderPickerType?.let { type ->
+        ReminderDefaultPicker(
+            title = stringResource(R.string.settings_special_dates_reminders),
+            presets = ALLDAY_REMINDER_PRESETS,
+            selected = state.reminderChoices[type] ?: CalendarReminderOverride.None,
+            // Managed calendars own their reminders outright — no "inherit global".
+            allowInherit = false,
+            onSelect = { viewModel.setSpecialDatesReminders(type, it) },
+            onDismiss = { reminderPickerType = null },
+        )
+    }
+}
+
+/** The lead-time list backing a managed calendar's reminder choice (for the summary label). */
+private fun specialDatesReminderMinutes(choice: CalendarReminderOverride?): List<Int> =
+    (choice as? CalendarReminderOverride.Minutes)?.minutes.orEmpty()
+
+@Composable
+private fun SpecialDatesDisableDialog(
+    message: String,
+    onConfirm: () -> Unit,
+    onDismiss: () -> Unit,
+) {
+    androidx.compose.material3.AlertDialog(
+        onDismissRequest = onDismiss,
+        title = { Text(stringResource(R.string.settings_special_dates_disable_title)) },
+        text = { Text(message) },
+        confirmButton = {
+            androidx.compose.material3.TextButton(onClick = onConfirm) {
+                Text(stringResource(R.string.settings_special_dates_disable_confirm))
+            }
+        },
+        dismissButton = {
+            androidx.compose.material3.TextButton(onClick = onDismiss) {
+                Text(stringResource(R.string.dialog_cancel))
+            }
+        },
+    )
+}
+
+@Composable
+private fun SpecialDatesTemplateDialog(
+    initial: String,
+    onConfirm: (String) -> Unit,
+    onDismiss: () -> Unit,
+) {
+    var text by rememberSaveable { mutableStateOf(initial) }
+    androidx.compose.material3.AlertDialog(
+        onDismissRequest = onDismiss,
+        title = { Text(stringResource(R.string.settings_special_dates_template)) },
+        text = {
+            Column {
+                // The app's borderless input over a tonal surface (the dialog
+                // convention — see DialogControls), not Material's outlined field.
+                Surface(
+                    color = MaterialTheme.colorScheme.surfaceContainerHighest,
+                    shape = RoundedCornerShape(12.dp),
+                ) {
+                    InlineTextField(
+                        value = text,
+                        onValueChange = { text = it },
+                        placeholder = stringResource(R.string.settings_special_dates_template),
+                        modifier = Modifier
+                            .fillMaxWidth()
+                            .padding(horizontal = 14.dp, vertical = 12.dp),
+                    )
+                }
+                Spacer(Modifier.height(8.dp))
+                Text(
+                    text = stringResource(R.string.settings_special_dates_template_hint),
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+        },
+        confirmButton = {
+            androidx.compose.material3.TextButton(
+                onClick = { onConfirm(text) },
+                enabled = text.isNotBlank(),
+            ) { Text(stringResource(R.string.dialog_save)) }
+        },
+        dismissButton = {
+            androidx.compose.material3.TextButton(onClick = onDismiss) {
+                Text(stringResource(R.string.dialog_cancel))
+            }
+        },
+    )
+}
+
+private fun specialDateTypeLabel(type: SpecialDateType): Int = when (type) {
+    SpecialDateType.Birthday -> R.string.settings_special_dates_type_birthday
+    SpecialDateType.Anniversary -> R.string.settings_special_dates_type_anniversary
+    SpecialDateType.Custom -> R.string.settings_special_dates_type_custom
+}
+
+@Composable
+private fun specialDatesLastRunLabel(context: Context, lastRun: Long): String =
+    if (lastRun <= 0L) {
+        stringResource(R.string.settings_special_dates_never_synced)
+    } else {
+        stringResource(
+            R.string.settings_special_dates_last_synced,
+            android.text.format.DateUtils.getRelativeTimeSpanString(
+                lastRun,
+                System.currentTimeMillis(),
+                android.text.format.DateUtils.MINUTE_IN_MILLIS,
+            ).toString(),
+        )
+    }
+
 /** Which calendar + event kind a per-calendar reminder-override dialog targets. */
 private data class OverrideTarget(val calendarId: Long, val isAllDay: Boolean)
 
@@ -1314,22 +1640,11 @@ private fun formatTimeOfDay(context: Context, minutesOfDay: Int): String {
     return DateFormat.getTimeFormat(context).format(time)
 }
 
-/** The stored override for [calendarId], as a picker choice (absent → inherit). */
-private fun Map<Long, List<Int>>.choiceFor(calendarId: Long): CalendarReminderOverride = when {
-    !containsKey(calendarId) -> CalendarReminderOverride.Inherit
-    this.getValue(calendarId).isEmpty() -> CalendarReminderOverride.None
-    else -> CalendarReminderOverride.Minutes(this.getValue(calendarId))
-}
-
 /** Label for a global-default choice: empty → "None", else the lead times joined. */
 @Composable
 private fun reminderChoiceLabel(minutes: List<Int>): String {
     if (minutes.isEmpty()) return stringResource(R.string.reminder_none)
-    // reminderLeadTimeLabel is @Composable, so resolve each part in a loop rather
+    return minutes.map { reminderLeadTimeLabel(it) }.joinToString(", ")
-    // than a (non-composable) joinToString transform.
-    val parts = ArrayList<String>(minutes.size)
-    for (m in minutes) parts.add(reminderLeadTimeLabel(m))
-    return parts.joinToString(", ")
 }
 
 /** Row summary for a calendar: its override, or the inherited global default. */

app/src/main/java/de/jeanlucmakiola/calendula/ui/settings/SettingsUiState.kt

@@ -1,5 +1,6 @@
 package de.jeanlucmakiola.calendula.ui.settings
 
+import de.jeanlucmakiola.calendula.data.prefs.CalendarReminderOverride
 import de.jeanlucmakiola.calendula.data.prefs.PastEventDisplay
 import de.jeanlucmakiola.calendula.data.prefs.SettingsPrefs
 import de.jeanlucmakiola.calendula.data.prefs.ThemeMode
@@ -7,6 +8,7 @@ import de.jeanlucmakiola.calendula.data.prefs.TimeFormatPref
 import de.jeanlucmakiola.calendula.data.prefs.WeekStartPref
 import de.jeanlucmakiola.calendula.domain.CalendarSource
 import de.jeanlucmakiola.calendula.domain.EventFormField
+import de.jeanlucmakiola.calendula.domain.contacts.SpecialDateType
 import de.jeanlucmakiola.calendula.ui.agenda.AgendaRange
 import de.jeanlucmakiola.calendula.ui.common.CalendarView
 import de.jeanlucmakiola.calendula.ui.common.IMPLEMENTED_VIEWS
@@ -75,4 +77,30 @@ data class SettingsUiState(
      * colour palette (the colour may then not survive their next sync).
      */
     val allowColorOnUnsupportedCalendars: Boolean = false,
+    /**
+     * Ids of the contact special-dates calendars. Their reminders are owned by
+     * the Contact special dates section, so the per-calendar override list links
+     * out to it instead of offering an override here.
+     */
+    val managedCalendarIds: Set<Long> = emptySet(),
+)
+
+/**
+ * State for the contact special-dates sub-page (issue #15). Exposed as its own
+ * flow rather than folded into [SettingsUiState] (whose combine is already full).
+ * [titleTemplates] is always populated — a blank stored template resolves to the
+ * localized default so the editor never shows an empty field.
+ */
+data class SpecialDatesUiState(
+    val enabled: Boolean = false,
+    val types: Set<SpecialDateType> = SpecialDateType.entries.toSet(),
+    val titleTemplates: Map<SpecialDateType, String> = emptyMap(),
+    /** The reminder choice per type's managed calendar (applied to all its events). */
+    val reminderChoices: Map<SpecialDateType, CalendarReminderOverride> = emptyMap(),
+    /** Whether {year} resolves in titles (the source year is static and always correct). */
+    val showYear: Boolean = true,
+    /** True when READ_CONTACTS was revoked after enabling — the mirror is paused. */
+    val stalledPermission: Boolean = false,
+    /** Epoch millis of the last sync, or 0 if it has never run. */
+    val lastRun: Long = 0L,
 )

app/src/main/java/de/jeanlucmakiola/calendula/ui/settings/SettingsViewModel.kt

@@ -11,17 +11,24 @@ import androidx.lifecycle.viewModelScope
 import dagger.hilt.android.lifecycle.HiltViewModel
 import dagger.hilt.android.qualifiers.ApplicationContext
 import de.jeanlucmakiola.calendula.data.calendar.CalendarRepository
+import de.jeanlucmakiola.calendula.data.contacts.SpecialDatesCalendarSpec
+import de.jeanlucmakiola.calendula.data.contacts.SpecialDatesScheduler
+import de.jeanlucmakiola.calendula.data.contacts.SpecialDatesSyncEngine
+import de.jeanlucmakiola.calendula.data.contacts.resolveTitleTemplate
 import de.jeanlucmakiola.calendula.data.di.IoDispatcher
 import de.jeanlucmakiola.calendula.data.fonts.CustomFontStore
 import de.jeanlucmakiola.calendula.data.prefs.CalendarReminderOverride
+import de.jeanlucmakiola.calendula.data.prefs.choiceFor
 import de.jeanlucmakiola.calendula.data.prefs.PastEventDisplay
 import de.jeanlucmakiola.calendula.data.prefs.SettingsPrefs
+import de.jeanlucmakiola.calendula.data.prefs.SpecialDatesStalledReason
 import de.jeanlucmakiola.calendula.data.prefs.ThemeMode
 import de.jeanlucmakiola.calendula.data.prefs.TimeFormatPref
 import de.jeanlucmakiola.calendula.data.prefs.WeekStartPref
 import de.jeanlucmakiola.calendula.domain.CalendarSource
 import de.jeanlucmakiola.calendula.domain.EventFormField
 import de.jeanlucmakiola.calendula.domain.FontRole
+import de.jeanlucmakiola.calendula.domain.contacts.SpecialDateType
 import de.jeanlucmakiola.calendula.ui.agenda.AgendaRange
 import de.jeanlucmakiola.calendula.ui.agenda.storageValue
 import de.jeanlucmakiola.calendula.ui.common.CalendarView
@@ -52,6 +59,8 @@ import javax.inject.Inject
 class SettingsViewModel @Inject constructor(
     private val prefs: SettingsPrefs,
     repository: CalendarRepository,
+    private val specialDatesEngine: SpecialDatesSyncEngine,
+    specialDatesSpec: SpecialDatesCalendarSpec,
     @IoDispatcher private val io: CoroutineDispatcher,
     @ApplicationContext private val appContext: Context,
 ) : ViewModel() {
@@ -98,8 +107,9 @@ class SettingsViewModel @Inject constructor(
                 prefs.perCalendarReminderOverride,
                 prefs.perCalendarAllDayReminderOverride,
                 writableCalendars,
-            ) { overrides, allDayOverrides, calendars ->
+                prefs.managedCalendarIds,
-                ReminderOverrides(overrides, allDayOverrides, calendars)
+            ) { overrides, allDayOverrides, calendars, managedIds ->
+                ReminderOverrides(overrides, allDayOverrides, calendars, managedIds)
             },
             combine(
                 prefs.defaultView,
@@ -144,6 +154,7 @@ class SettingsViewModel @Inject constructor(
                 perCalendarReminderOverride = overrides.timed,
                 perCalendarAllDayReminderOverride = overrides.allDay,
                 writableCalendars = overrides.calendars,
+                managedCalendarIds = overrides.managedIds,
             )
         }.stateIn(
             scope = viewModelScope,
@@ -192,6 +203,7 @@ class SettingsViewModel @Inject constructor(
         val timed: Map<Long, List<Int>>,
         val allDay: Map<Long, List<Int>>,
         val calendars: List<CalendarSource>,
+        val managedIds: Set<Long>,
     )
 
     private data class ViewSettings(
@@ -215,6 +227,95 @@ class SettingsViewModel @Inject constructor(
         val drawerOrder: List<CalendarView>,
     )
 
+    /** Contact special-dates sub-page (issue #15); its own flow — the main state is full. */
+    val specialDatesState: StateFlow<SpecialDatesUiState> = combine(
+        combine(
+            prefs.specialDatesEnabled,
+            prefs.specialDatesTypes,
+            prefs.specialDatesTitleTemplates,
+            prefs.specialDatesShowYear,
+            prefs.specialDatesStatus,
+        ) { enabled, types, templates, showYear, status ->
+            SpecialDatesUiState(
+                enabled = enabled,
+                types = types,
+                // A blank stored template resolves to the localized default so the
+                // editor always shows something sensible.
+                titleTemplates = SpecialDateType.entries.associateWith { type ->
+                    specialDatesSpec.resolveTitleTemplate(type, templates)
+                },
+                showYear = showYear,
+                stalledPermission = status.stalled == SpecialDatesStalledReason.PermissionRevoked,
+                lastRun = status.lastRun,
+            )
+        },
+        prefs.specialDatesCalendars,
+        prefs.perCalendarAllDayReminderOverride,
+    ) { base, calendars, allDayOverrides ->
+        base.copy(
+            // An override is always seeded on creation; present-empty = None.
+            reminderChoices = calendars.mapValues { (_, calendarId) ->
+                allDayOverrides.choiceFor(calendarId)
+            },
+        )
+    }.stateIn(
+        scope = viewModelScope,
+        started = SharingStarted.WhileSubscribed(5_000L),
+        initialValue = SpecialDatesUiState(),
+    )
+
+    /**
+     * Turn the mirror on or off. Enabling schedules the daily job and runs an
+     * immediate sync (which creates the calendars); disabling cancels the job and
+     * tears the managed calendars down. The caller must have READ_CONTACTS granted
+     * before enabling.
+     */
+    fun setSpecialDatesEnabled(enabled: Boolean) {
+        viewModelScope.launch {
+            prefs.setSpecialDatesEnabled(enabled)
+            if (enabled) {
+                SpecialDatesScheduler.apply(appContext, enabled = true)
+                SpecialDatesScheduler.runNow(appContext)
+            } else {
+                SpecialDatesScheduler.apply(appContext, enabled = false)
+                withContext(io) { specialDatesEngine.teardown() }
+            }
+        }
+    }
+
+    fun setSpecialDateTypeEnabled(type: SpecialDateType, enabled: Boolean) {
+        viewModelScope.launch {
+            prefs.setSpecialDateTypeEnabled(type, enabled)
+            // Reconcile now: create the new type's calendar, or delete a disabled one.
+            SpecialDatesScheduler.runNow(appContext)
+        }
+    }
+
+    fun setSpecialDatesTitleTemplate(type: SpecialDateType, template: String) {
+        viewModelScope.launch {
+            prefs.setSpecialDatesTitleTemplate(type, template.trim())
+            SpecialDatesScheduler.runNow(appContext)
+        }
+    }
+
+    fun setSpecialDatesShowYear(enabled: Boolean) {
+        viewModelScope.launch {
+            prefs.setSpecialDatesShowYear(enabled)
+            SpecialDatesScheduler.runNow(appContext)
+        }
+    }
+
+    /**
+     * Set a type's managed-calendar reminder default and apply it to all its
+     * existing events (managed calendars own their reminders calendar-wide).
+     */
+    fun setSpecialDatesReminders(type: SpecialDateType, override: CalendarReminderOverride) {
+        viewModelScope.launch { withContext(io) { specialDatesEngine.applyReminders(type, override) } }
+    }
+
+    /** Kick off an immediate reconcile (the "Sync now" action). */
+    fun syncSpecialDatesNow() = SpecialDatesScheduler.runNow(appContext)
+
     fun setThemeMode(mode: ThemeMode) {
         viewModelScope.launch { prefs.setThemeMode(mode) }
     }

app/src/main/java/de/jeanlucmakiola/calendula/ui/week/WeekScreen.kt

@@ -128,6 +128,7 @@ private fun WeekUiState.Success.allDayStripHeight(): Dp {
 fun WeekScreen(
     selectedView: CalendarView,
     onSelectView: (CalendarView) -> Unit,
+    onOpenDay: (LocalDate) -> Unit,
     onEventClick: (EventInstance) -> Unit,
     onOpenSettings: () -> Unit,
     onOpenSearch: () -> Unit,
@@ -249,6 +250,7 @@ fun WeekScreen(
                     onSwipePrev = goPrev,
                     onRetry = jumpToToday,
                     onEventClick = onEventClick,
+                    onOpenDay = onOpenDay,
                     onCreateAt = { d, minutes -> onCreateEvent(d, minutes) },
                     modifier = Modifier
                         .padding(innerPadding)
@@ -268,6 +270,7 @@ private fun WeekContent(
     onSwipePrev: () -> Unit,
     onRetry: () -> Unit,
     onEventClick: (EventInstance) -> Unit,
+    onOpenDay: (LocalDate) -> Unit,
     onCreateAt: (LocalDate, Int) -> Unit,
     modifier: Modifier = Modifier,
 ) {
@@ -342,6 +345,7 @@ private fun WeekContent(
                 scrollState = scrollState,
                 allDayHeight = allDayHeight,
                 onEventClick = onEventClick,
+                onOpenDay = onOpenDay,
                 onCreateAt = onCreateAt,
             )
         }
@@ -355,6 +359,7 @@ private fun WeekSuccess(
     scrollState: ScrollState,
     allDayHeight: Dp,
     onEventClick: (EventInstance) -> Unit,
+    onOpenDay: (LocalDate) -> Unit,
     onCreateAt: (LocalDate, Int) -> Unit,
 ) {
     Column(modifier = Modifier.fillMaxSize()) {
@@ -363,7 +368,7 @@ private fun WeekSuccess(
                 .fillMaxWidth()
                 .background(topSectionColor),
         ) {
-            WeekDayHeader(days = state.days, today = state.today)
+            WeekDayHeader(days = state.days, today = state.today, onOpenDay = onOpenDay)
             AllDayStrip(state = state, height = allDayHeight, onEventClick = onEventClick)
         }
         // Breathing room between the (colour-shifting) top section and the
@@ -427,7 +432,11 @@ private fun WeekTopBar(
 }
 
 @Composable
-private fun WeekDayHeader(days: List<LocalDate>, today: LocalDate) {
+private fun WeekDayHeader(
+    days: List<LocalDate>,
+    today: LocalDate,
+    onOpenDay: (LocalDate) -> Unit,
+) {
     val locale = currentLocale()
     val weekStart = days.first()
     val weekNumber = remember(weekStart) {
@@ -453,7 +462,10 @@ private fun WeekDayHeader(days: List<LocalDate>, today: LocalDate) {
             val javaDow = java.time.DayOfWeek.of(date.dayOfWeek.ordinal + 1)
             val isToday = date == today
             Column(
-                modifier = Modifier.weight(1f),
+                modifier = Modifier
+                    .weight(1f)
+                    .clip(RoundedCornerShape(12.dp))
+                    .clickable { onOpenDay(date) },
                 horizontalAlignment = Alignment.CenterHorizontally,
             ) {
                 Text(

app/src/main/res/values-de/strings.xml

@@ -12,7 +12,7 @@
     <string name="state_failure_provider">Kalender konnte nicht gelesen werden.</string>
     <!-- Permission-Flow (F1) -->
     <string name="permission_rationale_title">Alle Termine, schön im Blick</string>
-    <string name="permission_rationale_body">Calendula braucht Zugriff auf deinen Kalender, um deine Termine zu zeigen und zu verwalten. Mehr verlangt die App nie.</string>
+    <string name="permission_rationale_body">Calendula braucht Zugriff auf deinen Kalender, um deine Termine zu zeigen und zu verwalten. Mehr braucht sie nicht um zu funktionieren — und nichts verlässt dein Gerät.</string>
     <string name="permission_request_button">Kalender-Zugriff erlauben</string>
     <string name="permission_denied_title">Kalender-Zugriff abgelehnt</string>
     <string name="permission_denied_body">Ohne Kalender-Zugriff kann Calendula keine Termine anzeigen. Du kannst den Zugriff in den System-Einstellungen wieder erlauben.</string>
@@ -309,7 +309,7 @@
     <string name="settings_language">App-Sprache</string>
     <string name="settings_language_auto">Systemstandard</string>
     <!-- Hub category subtitles -->
-    <string name="settings_appearance_subtitle">Design, dynamische Farben, Wochenstart</string>
+    <string name="settings_appearance_subtitle">Design, Standartansicht, Wochenstart</string>
     <string name="settings_event_form_subtitle">Standardfelder für neue Termine</string>
     <string name="settings_notifications_subtitle">Termin-Erinnerungen</string>
     <string name="settings_section_about">Über</string>
@@ -387,4 +387,27 @@
     <string name="crash_report_open_failed">Der Issue-Tracker konnte nicht geöffnet werden. Der Bericht ist in deiner Zwischenablage.</string>
     <string name="crash_report_body_template">Danke, dass du einen Absturz in Calendula meldest. Bitte ergänze, was du gerade getan hast, und sende dann ab.\n\n### Was ist passiert\n\n\n### Absturzbericht\n%1$s\n</string>
     <string name="crash_report_body_paste">_(Der Bericht war zu lang für diesen Link — füge ihn aus deiner Zwischenablage hier ein.)_</string>
+    <string name="event_edit_managed_hint">Verwaltet durch “%1$s” — der Titel, das Datum und Wiederholungen werden synchron mit deinen Kontakten gehalten. Erinnerungen, Ort und Beschreibung kannst du frei bearbeiten.</string>
+    <plurals name="duration_days">
+        <item quantity="one">%d Tag</item>
+        <item quantity="other">%d Tage</item>
+    </plurals>
+    <plurals name="duration_weeks">
+        <item quantity="one">Woche</item>
+        <item quantity="other">Wochen</item>
+    </plurals>
+    <string name="settings_default_view">Standartansicht</string>
+    <string name="settings_font_headings">Überschriften Schriftart</string>
+    <string name="settings_font_system">Systemstandard</string>
+    <string name="font_jetbrains_mono">JetBrains Mono</string>
+    <string name="settings_font_choose_file">Datei auswählen…</string>
+    <string name="settings_font_import_failed">Die Datei konnte nicht als Schriftart gelesen werden</string>
+    <string name="settings_dim_completed">Vergangene Ereignisse abdunkeln</string>
+    <string name="settings_dim_completed_summary">Vergangene Termine in der Monats- und Wochenansicht abdunkeln</string>
+    <string name="settings_past_events">Vergangene Termine</string>
+    <string name="settings_past_events_show">Zeigen</string>
+    <string name="settings_past_events_dim">Abdunkeln</string>
+    <string name="settings_past_events_hide">Ausblenden</string>
+    <string name="settings_agenda_header">Agenda</string>
+    <string name="settings_special_dates_reminders">Erinnerungen</string>
 </resources>

app/src/main/res/values-es/strings.xml

@@ -6,4 +6,464 @@
         <item>Days</item>
         <item>Weeks</item>
     </string-array>
+    <string name="app_name">Calendula</string>
+    <string name="app_tagline">Un calendario moderno.</string>
+    <string name="state_loading">Cargando…</string>
+    <string name="state_retry">Vuelve a intentarlo</string>
+    <string name="state_failure_unknown">Algo salio mal.</string>
+    <string name="state_failure_permission">Se requiere acceso al calendario.</string>
+    <string name="state_failure_permission_action">Permite el acceso</string>
+    <string name="state_failure_no_calendars">No se han configurado calendarios.</string>
+    <string name="state_failure_no_calendars_action">Abrir los ajustes del calendario del sistema</string>
+    <string name="state_failure_provider">No se pudo leer el calendario.</string>
+    <string name="permission_rationale_title">Mira todos sus eventos, a la perfección</string>
+    <string name="permission_rationale_body">Calendula necesita acceso a tu calendario para mostrarte y administrar eventos. Ese es el único permiso que pedirá para comenzar a funcionar. Y nada de información sale de tu dispositivo.</string>
+    <string name="permission_request_button">Conceder el acceso al calendario</string>
+    <string name="permission_denied_title">Acceso a calendario denegado</string>
+    <string name="permission_denied_body">Calendula no puede mostrar eventos sin acceso al calendario. Puedes concederlo en ajustes del sistema.</string>
+    <string name="permission_open_settings_button">Abrir ajustes del sistema</string>
+    <string name="permission_retry_button">Intentarlo de nuevo</string>
+    <string name="permission_benefit_private_title">Permanece en tu dispositivo</string>
+    <string name="permission_benefit_private_body">Tus calendarios se leen localmente y nunca abandonan tu celular.</string>
+    <string name="permission_benefit_sync_title">Todos tus calendarios, juntos</string>
+    <string name="permission_benefit_sync_body">Google, CalDAV, local — todo lo sincronizado en el dispositivo aparecerá.</string>
+    <string name="permission_benefit_privacy_title">Sin rastreo, jamás</string>
+    <string name="permission_benefit_privacy_body">Sin telemetría, sin analíticas, sin anuncios.</string>
+    <string name="permission_privacy_footnote">Permanece en tu dispositivo, no necesita acceso a internet</string>
+    <string name="month_prev">Mes anterior</string>
+    <string name="month_next">Siguiente mes</string>
+    <string name="month_today_action">Hoy</string>
+    <string name="month_more_actions">Mas acciones</string>
+    <string name="month_open_menu">Abrir menu</string>
+    <string name="month_action_settings">Ajustes</string>
+    <string name="month_a11y_today_prefix">Hoy</string>
+    <string name="week_today_action">Esta semana</string>
+    <string name="week_number_label">Sem</string>
+    <string name="day_today_action">Hoy</string>
+    <string name="event_detail_back">Atras</string>
+    <string name="event_detail_edit">Editar</string>
+    <string name="event_detail_delete">Eliminar</string>
+    <string name="event_detail_share">Compartir</string>
+    <string name="event_share_chooser_title">Compartir evento</string>
+    <string name="event_share_failed">No se pudo compartir el evento.</string>
+    <string name="event_delete_title">¿Eliminar evento?</string>
+    <string name="event_delete_body">El evento se elimino de tu calendario y de todos los dispositivos con los cuales se sincroniza.</string>
+    <string name="event_delete_recurring_title">Eliminar evento recurrente</string>
+    <string name="event_delete_option_occurrence">Solo este evento</string>
+    <string name="event_delete_option_following">Este y todos los eventos siguientes</string>
+    <string name="event_delete_option_series">Todos los eventos en la serie</string>
+    <string name="event_edit_recurring_title">Editar evento recurrente</string>
+    <string name="event_delete_failed">No se pudo eliminar el evento</string>
+    <string name="event_delete_write_denied">Calendula necesita acceso de escritura para eliminar eventos</string>
+    <string name="dialog_cancel">Cancelar</string>
+    <string name="dialog_ok">Okey</string>
+    <string name="event_edit_new_title">Nuevo evento</string>
+    <string name="event_edit_close">Cerrar</string>
+    <string name="event_edit_save">Guardar</string>
+    <string name="event_edit_title_hint">Añadir título</string>
+    <string name="event_edit_starts">Inicio</string>
+    <string name="event_edit_ends">Final</string>
+    <string name="event_edit_error_end_before_start">Termina antes de comenzar</string>
+    <string name="event_edit_error_no_calendar">No hay ningún calendario en donde se pueda escribir disponible</string>
+    <string name="event_edit_save_failed">No se pudo guardar el evento</string>
+    <string name="event_edit_write_denied">Calendula necesita acceso de escritura para crear eventos</string>
+    <string name="event_edit_more_fields">Mas campos</string>
+    <string name="event_edit_add">Añadir</string>
+    <string name="event_edit_add_reminder">Añadir recordatorio</string>
+    <string name="event_edit_remove_reminder">Eliminar recordatorio</string>
+    <string name="event_edit_attendees">Invitados</string>
+    <string name="event_edit_add_guest">Añadir invitados</string>
+    <string name="event_edit_add_guest_hint">Añadir invitados por correo…</string>
+    <string name="event_edit_add_guest_from_contacts">Añadir desde contactos</string>
+    <string name="event_edit_location_from_contacts">Seleccionar dirección desde contactos</string>
+    <string name="event_edit_remove_guest">Eliminar invitado</string>
+    <string name="event_edit_attendee_required">Obligatorio</string>
+    <string name="event_edit_attendee_optional">Opcional</string>
+    <string name="event_edit_attendees_note_synced">Calendula no envia invitaciones. Tu cuenta de calendario puede enviar correos a los invitados cuando se sincronice.</string>
+    <string name="event_edit_attendees_note_local">Guardado en el dispositivo. No se avisa a nadie.</string>
+    <string name="event_edit_reminder_custom">Personalizado</string>
+    <string name="reminder_unit_minutes">minutos</string>
+    <string name="reminder_unit_hours">horas</string>
+    <string name="reminder_unit_days">días</string>
+    <string name="reminder_unit_weeks">semanas</string>
+    <string name="event_edit_availability">Disponibilidad</string>
+    <string name="event_edit_visibility">Visibilidad</string>
+    <string name="event_edit_color">Color</string>
+    <string name="event_edit_color_default">Color del calendario</string>
+    <string name="event_edit_color_custom">Color personalizado</string>
+    <string name="event_edit_color_reset">Reiniciar</string>
+    <string name="event_edit_color_unsupported">No disponible para este calendario</string>
+    <string name="event_edit_color_unsupported_hint">Este calendario no admite un ser de colores. Puedes permitir colores personalizados para este tipo de calendarios en ajustes.</string>
+    <string name="event_edit_color_sync_warning">Este calendario puede eliminar o cambiar el color la próxima vez que se sincronice.</string>
+    <string name="event_edit_conflict_title">El evento fue cambiado por otra fuente</string>
+    <string name="event_edit_conflict_body">Mientras lo editabas, este evento fue cambiado — debido a la sincronización u otra aplicación ¿Que deberia le ocurrir a tus cambios?</string>
+    <string name="event_edit_conflict_overwrite">Guardar mis cambios</string>
+    <string name="event_edit_conflict_overwrite_hint">Sobreescribir el cambio externo en solo los aspectos que he cambiado</string>
+    <string name="event_edit_conflict_discard">Descartar todos mis cambios</string>
+    <string name="event_edit_conflict_discard_hint">El evento permanece tal y como esta ahora</string>
+    <string name="event_edit_gone_title">Evento eliminado</string>
+    <string name="event_edit_gone_body">Este evento fue eliminado durante el proceso, en otro dispositivo o aplicación por ejemplo. Tus cambios no pudieron ser guardados.</string>
+    <string name="event_edit_recurrence_none">No se repite</string>
+    <string name="event_edit_recurrence_custom">Personalizado</string>
+    <string name="event_edit_recurrence_every">Cada</string>
+    <string name="recurrence_unit_days">días</string>
+    <string name="recurrence_unit_weeks">semanas</string>
+    <string name="recurrence_unit_months">meses</string>
+    <string name="recurrence_unit_years">años</string>
+    <string name="event_edit_recurrence_ends">Finaliza</string>
+    <string name="event_edit_recurrence_end_never">Nunca</string>
+    <string name="event_edit_recurrence_end_until">En una fecha</string>
+    <string name="event_edit_recurrence_end_count">Después de cierto numero de veces</string>
+    <string name="event_edit_recurrence_times">veces</string>
+    <string name="event_edit_error_recurrence_ends_before_start">El evento se deja de repetir antes de que este comience</string>
+    <string name="event_availability_busy">Ocupado</string>
+    <string name="event_access_default">Por defecto</string>
+    <string name="event_access_public">Público</string>
+    <string name="event_detail_all_day">Todo el día</string>
+    <string name="event_detail_calendar">Calendario</string>
+    <string name="event_detail_calendar_unknown">Calendario desconocido</string>
+    <string name="event_detail_location">Ubicación</string>
+    <string name="event_detail_description">Descripción</string>
+    <string name="event_detail_attendees">Participantes</string>
+    <string name="event_detail_recurrence">Recurrencia</string>
+    <string name="agenda_today_action">Hoy</string>
+    <string name="agenda_header_today">Hoy</string>
+    <string name="search_back">Atras</string>
+    <string name="widget_new_event">Nuevo evento</string>
+    <string name="widget_prev_month">Mes anterior</string>
+    <string name="widget_next_month">Siguiente mes</string>
+    <string name="widget_today">Hoy</string>
+    <string name="filter_title">Calendarios</string>
+    <string name="settings_title">Ajustes</string>
+    <string name="settings_back">Atras</string>
+    <string name="agenda_range_day">Hoy</string>
+    <string name="agenda_range_this_week">Esta semana</string>
+    <string name="settings_section_calendars">Calendarios</string>
+    <string name="calendars_title">Calendarios</string>
+    <string name="calendars_color_label">Color</string>
+    <string name="import_close">Cerrar</string>
+    <string name="shortcut_new_event_short">Nuevo evento</string>
+    <string name="qs_tile_new_event_label">Nuevo evento</string>
+    <string name="event_detail_recurring">Repetir el evento</string>
+    <string name="recurrence_daily">Todos los días</string>
+    <string name="recurrence_weekly">Todas las semanas</string>
+    <string name="recurrence_monthly">Todos los meses</string>
+    <string name="recurrence_yearly">Todos los años</string>
+    <string name="recurrence_every_n_days">Cada %1$d días</string>
+    <string name="recurrence_every_n_weeks">Cada %1$d semanas</string>
+    <string name="recurrence_every_n_months">Cada %1$d meses</string>
+    <string name="recurrence_every_n_years">Cada %1$d años</string>
+    <string name="event_detail_not_found">Este evento ya no existe.</string>
+    <string name="event_attendee_accepted">Aceptado</string>
+    <string name="event_attendee_declined">Rechazado</string>
+    <string name="event_attendee_tentative">Tentativo</string>
+    <string name="event_attendee_needs_action">Sin respuesta</string>
+    <string name="event_attendee_unknown">—</string>
+    <string name="event_detail_reminders">Recordatorios</string>
+    <string name="event_detail_timezone">Zona horaria</string>
+    <string name="event_status_tentative">Tentativo</string>
+    <string name="event_status_cancelled">Cancelado</string>
+    <string name="event_availability_free">Disponible</string>
+    <string name="event_access_private">Privado</string>
+    <string name="event_access_confidential">Confidencial</string>
+    <string name="event_attendee_organizer">Organizador</string>
+    <string name="event_attendee_optional">Opcional</string>
+    <string name="agenda_range_custom">Personalizado…</string>
+    <string name="calendars_backup_header">Respaldo</string>
+    <string name="backup_channel_name">Respaldo</string>
+    <string name="event_detail_self_response">Tu respuesta: %1$s</string>
+    <string name="reminder_at_time">Al la hora del evento</string>
+    <string name="reminder_default">Recordatorio por defecto</string>
+    <plurals name="reminder_minutes">
+        <item quantity="one">%d minuto antes</item>
+        <item quantity="many">%d minutos antes</item>
+        <item quantity="other">%d minutos antes</item>
+    </plurals>
+    <plurals name="reminder_hours">
+        <item quantity="one">%d hora antes</item>
+        <item quantity="many">%d horas antes</item>
+        <item quantity="other">%d horas antes</item>
+    </plurals>
+    <plurals name="reminder_days">
+        <item quantity="one">%d día antes</item>
+        <item quantity="many">%d días antes</item>
+        <item quantity="other">%d días antes</item>
+    </plurals>
+    <plurals name="reminder_weeks">
+        <item quantity="one">%d semana antes</item>
+        <item quantity="many">%d semanas antes</item>
+        <item quantity="other">%d semanas antes</item>
+    </plurals>
+    <plurals name="duration_minutes">
+        <item quantity="one">%d minuto</item>
+        <item quantity="many">%d minutos</item>
+        <item quantity="other">%d minutos</item>
+    </plurals>
+    <plurals name="duration_hours">
+        <item quantity="one">%d hora</item>
+        <item quantity="many">%d horas</item>
+        <item quantity="other">%d horas</item>
+    </plurals>
+    <plurals name="duration_days">
+        <item quantity="one">%d dia</item>
+        <item quantity="many">%d días</item>
+        <item quantity="other">%d días</item>
+    </plurals>
+    <plurals name="duration_weeks">
+        <item quantity="one">%d semana</item>
+        <item quantity="many">%d semanas</item>
+        <item quantity="other">%d semanas</item>
+    </plurals>
+    <string name="event_untitled">(Sin título)</string>
+    <string name="reminder_channel_name">Recordatorios del evento</string>
+    <string name="reminder_channel_description">Notificaciones a la hora de los recordatorios de tus eventos</string>
+    <string name="reminder_onboarding_title">Nunca te pierdas un evento</string>
+    <string name="reminder_onboarding_body">Android no muestra recordatorios de eventos por su cuenta — una app de calendario tiene que hacerlo. Deja que calendula cumpla ese trabajo.</string>
+    <string name="reminder_benefit_delivery_title">Recordatorios, enviados</string>
+    <string name="reminder_benefit_delivery_body">Cada recordatorio de tus eventos aparece como notificación, justo a tiempo.</string>
+    <string name="reminder_benefit_duplicates_title">¿Utilizas otra aplicación de calendario?</string>
+    <string name="reminder_benefit_duplicates_body">Si otra aplicación tambien muestra recordatorios, los veras dos veces — desactivalos en esta o la otra aplicación.</string>
+    <string name="reminder_benefit_reversible_title">Cambialo en cualquier momento</string>
+    <string name="reminder_benefit_reversible_body">El interruptor se encuentra en Ajustes, en la sección de Notificaciones.</string>
+    <string name="reminder_onboarding_enable_button">Activar recordatorios</string>
+    <string name="reminder_onboarding_skip_button">Mas tarde</string>
+    <string name="reminder_action_snooze">Posponer</string>
+    <string name="reminder_action_dismiss">Descartar</string>
+    <string name="view_month">Mes</string>
+    <string name="view_week">Semana</string>
+    <string name="view_day">Día</string>
+    <string name="view_agenda">Agenda</string>
+    <string name="view_section">Vista</string>
+    <string name="drawer_jump_to_date">Ir a la fecha</string>
+    <string name="agenda_header_tomorrow">Mañana</string>
+    <string name="agenda_empty_title">Ya estas al día</string>
+    <string name="search_action">Buscar</string>
+    <string name="search_hint">Buscar eventos</string>
+    <string name="search_clear">Limpiar</string>
+    <string name="search_idle_hint">Buscar eventos por titulo, ubicación o notas.</string>
+    <string name="search_empty">No evento coincide con “%1$s”.</string>
+    <string name="widget_agenda_title">Próximamente</string>
+    <string name="widget_agenda_label">Calendula agenda</string>
+    <string name="widget_month_label">Calendula mes</string>
+    <string name="widget_refresh">Actualizar</string>
+    <string name="widget_needs_permission">Abre Calendula para conceder acceso al calendario</string>
+    <string name="settings_section_appearance">Apariencia</string>
+    <string name="settings_theme">Tema</string>
+    <string name="settings_theme_system">Igual que el sistema</string>
+    <string name="settings_theme_light">Claro</string>
+    <string name="settings_theme_dark">Oscuro</string>
+    <string name="settings_default_view">Vista por defecto</string>
+    <string name="settings_dynamic_color">Color dinámico</string>
+    <string name="settings_dynamic_color_unavailable">Requiere android 12 o una versión posterior</string>
+    <string name="settings_week_start">La semana empieza en</string>
+    <string name="settings_week_start_auto">Automático</string>
+    <string name="settings_time_format">Formato de la hora</string>
+    <string name="settings_time_format_auto">Automático</string>
+    <string name="settings_time_format_12h">12-horas (2:00 PM)</string>
+    <string name="settings_time_format_24h">24-horas (14:00)</string>
+    <string name="settings_hour_lines">Lineas entre horas</string>
+    <string name="settings_hour_lines_summary">Muestra una linea que separa cada hora en la vista diaria y semanal</string>
+    <string name="settings_dim_completed">Oscurecer eventos completados</string>
+    <string name="settings_dim_completed_summary">Oscurece eventos que ya han terminado en vista semanal y mensual</string>
+    <string name="settings_past_events">Eventos pasados</string>
+    <string name="settings_past_events_show">Mostrar</string>
+    <string name="settings_past_events_dim">Oscurecer</string>
+    <string name="settings_past_events_hide">Ocultar</string>
+    <string name="settings_agenda_header">Agenda</string>
+    <string name="settings_agenda_range">Rango de agenda</string>
+    <string name="settings_agenda_range_hint">Cuanto tiempo abarca la agenda al mostrar eventos.</string>
+    <string name="settings_agenda_widget_range">Rango del widget de agenda</string>
+    <string name="settings_agenda_widget_range_hint">Cuanto tiempo abarca el widget de agenda en la pantalla principal al mostrar eventos.</string>
+    <string name="settings_agenda_range_bar">Barra de tiempo</string>
+    <string name="settings_agenda_range_bar_hint">Muestra una barra en la parte superior de la agenda con las fechas mostradas, con un botón para cambiar el rango durante la sesión</string>
+    <string name="agenda_range_this_month">Este mes</string>
+    <string name="agenda_range_week">Próximos 7 días</string>
+    <string name="agenda_range_month">Próximos 30 días</string>
+    <string name="agenda_range_custom_hint">Días</string>
+    <string name="agenda_range_override_hint">Solo por ahora — reinicia tu rango guardado cuando reabras calendula.</string>
+    <string name="agenda_range_showing_label">Mostrando todos los próximos eventos por</string>
+    <plurals name="agenda_range_days">
+        <item quantity="one">%d dia</item>
+        <item quantity="many">%d dias</item>
+        <item quantity="other">%d dias</item>
+    </plurals>
+    <string name="settings_section_event_form">Formulario de nuevo evento</string>
+    <string name="settings_form_fields_hint">Campos mostrados por defecto — todo lo demás se encuentra bajo \"mas campos\"</string>
+    <string name="settings_autofocus_title">Enfocar titulo en nuevos eventos</string>
+    <string name="settings_autofocus_title_hint">Cuando comienzas un nuevo evento, coloca el cursor en el titulo y abre el teclado inmediatamente.</string>
+    <string name="settings_color_unsupported">Permitir colores en calendarios no admitidos</string>
+    <string name="settings_color_unsupported_hint">Algunas calendarios (como algunos CalDAV) no publican un set de colores; un color customizado puede ser eliminado o sobreescrito por su servicio de sincronización. Eso es una limitacion de estos calendarios, no algo que calendula pueda solucionar.</string>
+    <string name="settings_section_notifications">Notificaciones</string>
+    <string name="settings_reminders">Recordatorios de eventos</string>
+    <string name="settings_reminders_hint">Los recordatorios aparecen dos veces? Otra aplicación de calendario tambien los esta generando — desactivarlo en una de las dos apps.</string>
+    <string name="settings_default_reminder">Recordatorio por defecto</string>
+    <string name="settings_default_reminder_allday">Eventos que duran todo el dia</string>
+    <string name="settings_allday_reminder_time">Hora del recordatorio de todo el día</string>
+    <string name="settings_allday_reminder_time_hint">Los recordatorios para eventos de todo el día se generaran a las %1$s</string>
+    <string name="reminder_none">Ninguno</string>
+    <string name="reminder_use_default">Usar recordatorio por defecto</string>
+    <string name="reminder_custom_amount">Cantidad</string>
+    <string name="reminder_custom_set">Guardar</string>
+    <string name="settings_calendar_reminders_title">Recordatorios por calendario</string>
+    <string name="settings_calendar_reminders_hint">Sobreescribe el por recordatorio defecto por calendario — De forma separada para eventos con duración fija o que duran todo el dia. Un calendario puede mantener el por defecto o tener su propia configuracion.</string>
+    <string name="settings_calendar_reminder_inherits">Por defecto (%1$s)</string>
+    <string name="settings_reliable_delivery">Notificaciones confiables</string>
+    <string name="settings_reliable_delivery_hint">Android puede atrasar los recordatorios para guardar batería. Excluye calendula de la optimización de batería para que se puedan generar a tiempo.</string>
+    <string name="settings_reliable_delivery_exempt">Excluido de la optimización de batería — los recordatorios llegaran a tiempo.</string>
+    <string name="settings_snooze_duration">Duración al posponer</string>
+    <string name="settings_manage_calendars">Administrar calendarios</string>
+    <string name="settings_manage_calendars_hint">Crear calendarios locales; administrar calendarios sincronizados</string>
+    <string name="settings_section_language">Idioma</string>
+    <string name="settings_language">Idioma de la aplicación</string>
+    <string name="settings_language_auto">Igual que el sistema</string>
+    <string name="settings_translate">Ayuda a traducir</string>
+    <string name="settings_translate_hint">Añade o mejora un idioma en Weblate</string>
+    <string name="settings_appearance_subtitle">Tema, vista por defecto, inicio de semana</string>
+    <string name="settings_event_form_subtitle">Campos por defecto en nuevos eventos</string>
+    <string name="settings_notifications_subtitle">Recordatorios de eventos</string>
+    <string name="settings_license">Licencia</string>
+    <string name="settings_license_value">MIT</string>
+    <string name="settings_about_author">Por Jean-Luc Makiola</string>
+    <string name="settings_about_source">Fuente</string>
+    <string name="settings_about_support">Ayuda al desarrollo</string>
+    <string name="settings_about_version">Version %1$s</string>
+    <string name="settings_about_logo_desc">Icono de la aplicación calendula</string>
+    <string name="settings_report_problem">Reportar un problema</string>
+    <string name="settings_report_problem_hint">Enviar un reporte de error o abre el sistema de seguimiento de errores</string>
+    <string name="calendars_local_header">Tus calendarios</string>
+    <string name="calendars_local_empty">Sin calendarios locales todavia. Crea uno para mantener eventos solo en este dispositivo.</string>
+    <string name="calendars_add">Añadir calendario</string>
+    <string name="calendars_disable_hint">Desactiva un calendario para removerlo de la aplicación — sus eventos, filtros y selectores. Nada se eliminara, y puedes reactivarlo en cualquier momento.</string>
+    <string name="calendars_show_in_app_a11y">Mostrar \"%1$s\" en la aplicación</string>
+    <string name="calendars_synced_header">Calendarios sincronizados</string>
+    <string name="calendars_synced_hint">Estos provienen de cuentas en tu dispositivo. Crea o editalos en su propia aplicación.</string>
+    <string name="calendars_manage_in_app">Gestionar en aplicación</string>
+    <string name="calendars_account_menu_a11y">Mas opciones para %1$s</string>
+    <string name="calendars_enable_all">Habilitar todos</string>
+    <string name="calendars_disable_all">Desactivar todos</string>
+    <string name="calendars_add_account">Añadir cuenta</string>
+    <string name="calendars_new_title">Nuevo calendario</string>
+    <string name="calendars_edit_title">Editar calendario</string>
+    <string name="calendars_name_label">Nombre</string>
+    <string name="calendars_description_hint">Añadir descripción</string>
+    <string name="calendars_delete_confirm_title">¿Eliminar calendario?</string>
+    <string name="calendars_delete_confirm_message">\"%1$s\" y todos sus eventos serán eliminados permanentemente de este dispositivo.</string>
+    <string name="calendars_write_error">No se pudieron guardar los cambios.</string>
+    <string name="calendars_backup_hint">Los calendarios locales no se sincronizan, exportalos como un archivo .ics para mantener una copia.</string>
+    <string name="calendars_backup_action">Exportar como archivo .ics</string>
+    <string name="calendars_auto_backup">Respaldo automático</string>
+    <string name="calendars_auto_backup_hint">Exporta tus calendarios a una carpeta como un archivo .ics de forma periodica.</string>
+    <string name="calendars_auto_backup_folder">Carpeta de respaldo</string>
+    <string name="calendars_auto_backup_folder_unset">Toca para seleccionar una carpeta</string>
+    <string name="calendars_auto_backup_interval">Intervalo</string>
+    <string name="calendars_auto_backup_every">Cada %1$s</string>
+    <string name="calendars_auto_backup_interval_min">Mínimo 30 minutos.</string>
+    <string name="calendars_auto_backup_status_never">Sin respaldos automáticos todavía</string>
+    <string name="calendars_auto_backup_status_ok">Ultimo respaldo: %1$s</string>
+    <string name="calendars_auto_backup_status_failed">Ultimo respaldo fallido: %1$s</string>
+    <string name="backup_channel_description">Advierte si los respaldos automáticos fallan repetidamente.</string>
+    <string name="backup_failed_title">El respaldo automático fallo</string>
+    <string name="backup_failed_text">Calendula no pudo generar el archivo de respaldo, comprueba la carpeta de respaldo en ajustes.</string>
+    <string name="calendars_backup_failed">No se pudo exportar el respaldo.</string>
+    <plurals name="calendars_backup_done">
+        <item quantity="one">Se exporto %d evento.</item>
+        <item quantity="many">Se exportaron %d eventos.</item>
+        <item quantity="other">Se exportaron %d eventos.</item>
+    </plurals>
+    <string name="import_title">Importar eventos</string>
+    <string name="import_target_header">Añadir a calendario</string>
+    <string name="import_empty">No se encontraron eventos en este archivo.</string>
+    <string name="import_failed">No se pudo leer el archivo.</string>
+    <string name="import_no_calendar">No hay ningún calendario editable en el cual importar los eventos. Crea un calendario local primero.</string>
+    <string name="import_done_title">Importación completa</string>
+    <string name="import_warning_recurrence">Se omitieron algunas ocurrencias editadas de eventos recurrentes.</string>
+    <string name="import_warning_no_start">Se omitió un evento sin hora de inicio.</string>
+    <string name="import_warning_attendees">No se importaron las listas de invitados.</string>
+    <string name="import_warning_timezone">Se reemplazo una zona horaria desconocida con la de tu dispositivo.</string>
+    <plurals name="import_event_count">
+        <item quantity="one">%d evento en este archivo.</item>
+        <item quantity="many">%d eventos en este archivo.</item>
+        <item quantity="other">%d eventos en este archivo.</item>
+    </plurals>
+    <plurals name="import_action">
+        <item quantity="one">Importar %d evento</item>
+        <item quantity="many">Importar %d eventos</item>
+        <item quantity="other">Importar %d eventos</item>
+    </plurals>
+    <plurals name="import_done_imported">
+        <item quantity="one">%d evento importado.</item>
+        <item quantity="many">%d eventos importados.</item>
+        <item quantity="other">%d eventos importados.</item>
+    </plurals>
+    <plurals name="import_done_skipped">
+        <item quantity="one">Se omitió %d archivo ya presente en este calendario.</item>
+        <item quantity="many">Se omitieron %d archivos ya presentes en este calendario.</item>
+        <item quantity="other">Se omitieron %d archivos ya presentes en este calendario.</item>
+    </plurals>
+    <string name="shortcut_new_event_long">Crear un nuevo evento</string>
+    <string name="settings_qs_tile">Añadir mosaico de ajustes rápidos</string>
+    <string name="settings_qs_tile_hint">Añadir un recuadro de \"nuevo evento\" al panel de ajustes rápidos.</string>
+    <string name="crash_dialog_title">Calendula ha fallado</string>
+    <string name="crash_dialog_message">Calendula se cerro de forma inesperada la ultima vez. Puedes ayudar a solucionarlo enviando un reporte del problema. Este permanece en tu dispositivo hasta que decidas enviarlo, y no contiene información personal o contenido de tu calendario — solo los detalles técnicos de mas abajo.</string>
+    <string name="crash_dialog_report">Reportar</string>
+    <string name="crash_dialog_dismiss">No por ahora</string>
+    <string name="crash_report_issue_title">Reporte de error</string>
+    <string name="crash_report_clip_label">Reporte de error de Calendula</string>
+    <string name="crash_report_copied">Reporte copiado a tu porta papeles</string>
+    <string name="crash_report_open_failed">No se pudo abrir el sistema de seguimiento de errores. El reporte es en tu portapapeles.</string>
+    <string name="crash_report_body_template">Gracias por reportar un error en Calendula. Por favor añade todo lo que recuerdas sobre lo que estabas haciendo y luego publicalo.\n\n### que sucedió\n\n\n### reporte de error\n%1$s\n</string>
+    <string name="crash_report_body_paste">_(el reporte es demasiado largo para este link — pegalo aquí desde su portapeles.)_</string>
+    <string name="event_attendee_resource">Recurso</string>
+    <string name="settings_section_about">Acerca de</string>
+    <string name="recurrence_with_count">%1$s, %2$d veces</string>
+    <string name="recurrence_with_until">%1$s hasta %2$s</string>
+    <string name="recurrence_on_days">%1$s los %2$s</string>
+    <string name="event_edit_managed_hint">Administrado por “%1$s” — el titulo, fecha y recurrencia se mantienen sincronizados con la inflación de tus contactos. Puedes editar los recordatorios, ubicacion y notas.</string>
+    <string name="settings_font_headings">Fuente de los títulos</string>
+    <string name="settings_font_body">Fuente del cuerpo del texto</string>
+    <string name="font_atkinson_hyperlegible">Atkinson Hyperlegible</string>
+    <string name="font_lora">Lora</string>
+    <string name="font_jetbrains_mono">JetBrains Mono</string>
+    <string name="settings_font_choose_file">Escoger desde archivo…</string>
+    <string name="settings_font_custom_selected">Fuente personalizada</string>
+    <string name="settings_font_import_failed">No se pude leer el archivo como fuente</string>
+    <string name="settings_section_views">Vistas</string>
+    <string name="settings_quick_switch_header">Botón de cambio rápido</string>
+    <string name="settings_quick_switch_hint">Escoge que vistas muestra el botón superior derecho y arrastralas para reordenalas. Las vistas deshabitadas permanecen accesibles desde el menú de navegación.</string>
+    <string name="settings_drawer_order_header">Menú de navegación</string>
+    <string name="settings_drawer_order_hint">Arrastra para cambiar el orden de las vistas que aparecen en el menú de navegación.</string>
+    <string name="reorder_drag_handle">Arrastra para reordenar</string>
+    <string name="settings_views_subtitle">Orden del botón de cambio rápido y menú</string>
+    <string name="settings_special_dates_subtitle">Aniversarios y cumpleaños de los contactos</string>
+    <string name="settings_section_special_dates">Fechas especiales de contactos</string>
+    <string name="settings_special_dates_enable">Mostrar fechas de contactos</string>
+    <string name="settings_special_dates_enable_hint">Refleja los cumpleaños y otras fechas de tus contactos en calendarios locales. Solo puede leer los contactos de este dispositivo — nada es compartido ni editado.</string>
+    <string name="settings_special_dates_type_birthday">Cumpleaños</string>
+    <string name="settings_special_dates_type_anniversary">Aniversarios</string>
+    <string name="settings_special_dates_type_custom">Otras fechas</string>
+    <string name="settings_special_dates_template">Formato de titulo</string>
+    <string name="settings_special_dates_template_hint">Usa {name} para el contacto y {year} para el año (el año de nacimiento u origen del aniversario; oculto cuando es desconocido).</string>
+    <string name="settings_special_dates_reminders">Recordatorios</string>
+    <string name="settings_special_dates_show_year">Mostrar año</string>
+    <string name="settings_special_dates_show_year_hint">Incluye {year} en títulos cuando se conoce el año</string>
+    <string name="settings_special_dates_sync_now">Sincronizar ahora</string>
+    <string name="settings_special_dates_never_synced">No se ha sincronizado todavía</string>
+    <string name="settings_special_dates_last_synced">Sincronizado por ultima vez %1$s</string>
+    <string name="settings_special_dates_calendar_hint">Cambia el color y visibilidad de cada calendario en ajustes de calendarios.</string>
+    <string name="settings_calendar_reminders_managed_hint">Establecido en Fechas especiales de contactos</string>
+    <string name="settings_special_dates_paused_hint">Calendula ya no puede leer tus contactos, por lo que estos calendarios ya no se estan actualizando.</string>
+    <string name="settings_special_dates_disable_title">¿Desactivar las fechas de contactos?</string>
+    <string name="settings_special_dates_disable_all_message">Esto eliminara los calendarios de fechas de contactos y sus eventos. Se perderán todos los recordatorios o notas agregadas.</string>
+    <string name="settings_special_dates_paused_title">Pausado</string>
+    <string name="settings_special_dates_disable_type_message">Esto eliminara el calendario “%1$s” y sus eventos. Se perderán todos los recordatorios o notas agregadas.</string>
+    <string name="settings_special_dates_disable_confirm">Desactivar</string>
+    <string name="special_dates_calendar_birthday">Cumpleaños</string>
+    <string name="special_dates_calendar_anniversary">Aniversarios</string>
+    <string name="special_dates_calendar_custom">Fechas especiales</string>
+    <string name="special_dates_default_title_birthday">Cumpleaños de {name} ({year})</string>
+    <string name="special_dates_default_title_anniversary">Aniversario de {name} ({year})</string>
+    <string name="special_dates_default_title_custom">{name}</string>
+    <string name="settings_special_dates_grant">Permitir acceso</string>
+    <string name="dialog_save">Guardar</string>
+    <string name="settings_font_system">Igual que el sistema</string>
 </resources>

app/src/main/res/values-it/strings.xml

@@ -6,4 +6,454 @@
         <item>Days</item>
         <item>Weeks</item>
     </string-array>
+    <string name="app_name">Calendula</string>
+    <string name="app_tagline">Un calendario moderno.</string>
+    <string name="state_loading">Caricamento…</string>
+    <string name="state_retry">Riprova</string>
+    <string name="state_failure_unknown">Qualcosa è andato storto.</string>
+    <string name="state_failure_permission">È richiesto l\'accesso al calendario.</string>
+    <string name="state_failure_permission_action">Concedi l\'accesso</string>
+    <string name="state_failure_no_calendars">Nessun calendario configurato.</string>
+    <string name="state_failure_no_calendars_action">Apri le impostazioni calendario di sistema</string>
+    <string name="state_failure_provider">Errore nella lettura del calendario.</string>
+    <string name="permission_rationale_title">Guarda tutti i tuoi eventi, magnificamente</string>
+    <string name="permission_rationale_body">Calendula ha bisogno di accedere al tuo calendario per mostrare e gestire gli eventi. È l\'unica cosa che ti chiederà.</string>
+    <string name="permission_request_button">Concedi l\'accesso al calendario</string>
+    <string name="permission_denied_title">Accesso al calendario negato</string>
+    <string name="permission_denied_body">Calendula non può mostrare gli eventi senza accesso al calendario. Puoi concederlo dalle impostazioni di sistema.</string>
+    <string name="permission_open_settings_button">Apri le impostazioni di sistema</string>
+    <string name="permission_retry_button">Riprova</string>
+    <string name="permission_benefit_private_title">Rimane sul tuo dispositivo</string>
+    <string name="permission_benefit_private_body">I tuoi calendari sono letti localmente e non lasciano mai il tuo telefono.</string>
+    <string name="permission_benefit_sync_title">Tutti i tuoi calendari, insieme</string>
+    <string name="permission_benefit_sync_body">Google, CalDAV, locali - qualsiasi calendario sincronizzato sul dispositivo semplicemente compare.</string>
+    <string name="permission_benefit_privacy_title">Nessun tracking, per sempre</string>
+    <string name="permission_benefit_privacy_body">Zero telemetria, zero analytics, zero pubblicità.</string>
+    <string name="permission_privacy_footnote">Rimane sul tuo dispositivo - nessun accesso a internet</string>
+    <string name="month_prev">Mese precedente</string>
+    <string name="month_next">Mese prossimo</string>
+    <string name="month_today_action">Oggi</string>
+    <string name="month_more_actions">Altre azioni</string>
+    <string name="month_open_menu">Apri il menù</string>
+    <string name="month_action_settings">Impostazioni</string>
+    <string name="month_a11y_today_prefix">Oggi</string>
+    <string name="week_today_action">Questa settimana</string>
+    <string name="week_number_label">Wk</string>
+    <string name="day_today_action">Oggi</string>
+    <string name="event_detail_back">Indietro</string>
+    <string name="event_detail_edit">Modifica</string>
+    <string name="event_detail_delete">Elimina</string>
+    <string name="event_detail_share">Condividi</string>
+    <string name="event_share_chooser_title">Condividi evento</string>
+    <string name="event_share_failed">Impossibile condividere questo evento.</string>
+    <string name="event_delete_title">Eliminare l\'evento?</string>
+    <string name="event_delete_body">Questo evento viene rimosso dal tuo calendario e da tutti i dispositivi sincronizzati.</string>
+    <string name="event_delete_recurring_title">Elimina ricorrenza</string>
+    <string name="event_delete_option_occurrence">Solo questo evento</string>
+    <string name="event_delete_option_following">Questo e gli eventi successivi</string>
+    <string name="event_delete_option_series">Tutti gli eventi della serie</string>
+    <string name="event_edit_recurring_title">Modifica ricorrenza</string>
+    <string name="event_delete_failed">Impossibile eliminare l\'evento</string>
+    <string name="event_delete_write_denied">Calendula ha bisogno dei permessi di scrittura per eliminare gli eventi</string>
+    <string name="dialog_cancel">Annulla</string>
+    <string name="dialog_ok">Ok</string>
+    <string name="event_edit_new_title">Nuovo evento</string>
+    <string name="event_edit_close">Chiudi</string>
+    <string name="event_edit_save">Salva</string>
+    <string name="event_edit_title_hint">Aggiungi titolo</string>
+    <string name="event_edit_starts">Inizio</string>
+    <string name="event_edit_ends">Fine</string>
+    <string name="event_edit_error_end_before_start">Fine antecedente l\'inizio</string>
+    <string name="event_edit_error_no_calendar">Non sono disponibili calendari</string>
+    <string name="event_edit_save_failed">Impossibile salvare l\'evento</string>
+    <string name="event_edit_write_denied">Calendula ha bisogno dei permessi di scrittura per creare gli eventi</string>
+    <string name="event_edit_more_fields">Altri campi</string>
+    <string name="event_edit_add">Aggiungi</string>
+    <string name="event_edit_add_reminder">Aggiungi promemoria</string>
+    <string name="event_edit_remove_reminder">Rimuovi promemoria</string>
+    <string name="event_edit_attendees">Partecipanti</string>
+    <string name="event_edit_add_guest">Aggiungi partecipante</string>
+    <string name="event_edit_add_guest_hint">Aggiungi un partecipante via email…</string>
+    <string name="event_edit_add_guest_from_contacts">Aggiungi dai contatti</string>
+    <string name="event_edit_location_from_contacts">Scegli un indirizzo dai contatti</string>
+    <string name="event_edit_remove_guest">Rimuovi partecipante</string>
+    <string name="event_edit_attendee_required">Obbligatorio</string>
+    <string name="event_edit_attendee_optional">Facoltativo</string>
+    <string name="event_edit_attendees_note_synced">Calendula non manda gli inviti agli eventi. Il tuo account calendario potrà inviare le email ai partecipanti al momento della sincronizzazione.</string>
+    <string name="event_edit_attendees_note_local">Salvato sul dispositivo. Nessuno ha ricevuto notifiche.</string>
+    <string name="event_edit_reminder_custom">Personalizza</string>
+    <string name="reminder_unit_minutes">minuti</string>
+    <string name="reminder_unit_hours">ore</string>
+    <string name="reminder_unit_days">giorni</string>
+    <string name="reminder_unit_weeks">settimane</string>
+    <string name="event_edit_availability">Disponibilità</string>
+    <string name="event_edit_visibility">Visibilità</string>
+    <string name="event_edit_color">Colore</string>
+    <string name="event_edit_color_default">Colore calendario</string>
+    <string name="event_edit_color_custom">Colore personalizzato</string>
+    <string name="event_edit_color_reset">Reset</string>
+    <string name="event_edit_color_unsupported">Non disponibile per questo calendario</string>
+    <string name="event_edit_color_unsupported_hint">I colori non sono ammessi per questo calendario. Puoi abilitare i colori personalizzati per questo tipo di calendario dalle Impostazioni.</string>
+    <string name="event_edit_color_sync_warning">Il colore per questo calendario potrà andare perso o essere sovrascritto alla prossima sincronizzazione.</string>
+    <string name="event_edit_conflict_title">Evento modificato altrove</string>
+    <string name="event_edit_conflict_body">Durante la modifica l\'evento è stato cambiato, tramite sincronizzazione o tramite altra app. Cosa fare con le modifiche in corso?</string>
+    <string name="event_edit_conflict_overwrite">Salva le modifiche</string>
+    <string name="event_edit_conflict_overwrite_hint">Sovrascrivi solo i campi modificati</string>
+    <string name="event_edit_conflict_discard">Annulla le mie modifiche</string>
+    <string name="event_edit_conflict_discard_hint">Mantieni l\'evento com\'è ora</string>
+    <string name="event_edit_gone_title">Evento eliminato</string>
+    <string name="event_edit_gone_body">Nel frattempo, questo evento è stato eliminato, ad esempio su un altro dispositivo. Le modifiche non possono più essere salvate.</string>
+    <string name="event_edit_recurrence_none">Non si ripete</string>
+    <string name="event_edit_recurrence_custom">Personalizza</string>
+    <string name="event_edit_recurrence_every">La serie</string>
+    <string name="recurrence_unit_days">giorni</string>
+    <string name="recurrence_unit_weeks">settimane</string>
+    <string name="recurrence_unit_months">mesi</string>
+    <string name="recurrence_unit_years">anni</string>
+    <string name="event_edit_recurrence_ends">Fine</string>
+    <string name="event_edit_recurrence_end_never">Mai</string>
+    <string name="event_edit_recurrence_end_until">Fino alla data</string>
+    <string name="event_edit_recurrence_end_count">Dopo un certo numero di occorrenze</string>
+    <string name="event_edit_recurrence_times">occorrenze</string>
+    <string name="event_edit_error_recurrence_ends_before_start">Fine antecedente l\'inizio</string>
+    <string name="event_availability_busy">Occupato</string>
+    <string name="event_access_default">Default</string>
+    <string name="event_access_public">Pubblico</string>
+    <string name="event_detail_all_day">Tutto il giorno</string>
+    <string name="event_detail_calendar">Calendario</string>
+    <string name="event_detail_calendar_unknown">Calendario sconosciuto</string>
+    <string name="event_detail_location">Luogo</string>
+    <string name="event_detail_description">Descrizione</string>
+    <string name="event_detail_attendees">Partecipanti</string>
+    <string name="recurrence_daily">Ogni giorni</string>
+    <string name="recurrence_weekly">Ogni settimana</string>
+    <string name="recurrence_monthly">Ogni mese</string>
+    <string name="recurrence_yearly">Ogni anno</string>
+    <string name="recurrence_every_n_days">Ogni %1$d giorni</string>
+    <string name="recurrence_every_n_weeks">Ogni %1$d settimane</string>
+    <string name="recurrence_every_n_months">Ogni %1$d mesi</string>
+    <string name="recurrence_every_n_years">Ogni %1$d anni</string>
+    <string name="event_detail_not_found">Questo evento è stato eliminato.</string>
+    <string name="event_attendee_accepted">Accettato</string>
+    <string name="event_attendee_declined">Rifiutato</string>
+    <string name="event_attendee_tentative">Provvisorio</string>
+    <string name="event_attendee_needs_action">Nessuna risposta</string>
+    <string name="event_attendee_unknown">—</string>
+    <string name="event_detail_reminders">Promemoria</string>
+    <string name="event_detail_timezone">Fuso orario</string>
+    <string name="event_status_tentative">Provvisorio</string>
+    <string name="event_status_cancelled">Annullato</string>
+    <string name="event_availability_free">Disponibile</string>
+    <string name="event_access_private">Privato</string>
+    <string name="event_access_confidential">Confidenziale</string>
+    <string name="event_attendee_organizer">Organizzatore</string>
+    <string name="event_attendee_optional">Facoltativo</string>
+    <string name="event_detail_self_response">La tua risposta: %1$s</string>
+    <string name="reminder_at_time">All\'ora dell\'evento</string>
+    <string name="reminder_default">Promemoria standard</string>
+    <plurals name="reminder_minutes">
+        <item quantity="one">%d minuto prima</item>
+        <item quantity="many">%d minuti prima</item>
+        <item quantity="other">%d minuti prima</item>
+    </plurals>
+    <plurals name="reminder_hours">
+        <item quantity="one">%d ora prima</item>
+        <item quantity="many">%d ore prima</item>
+        <item quantity="other">%d ore prima</item>
+    </plurals>
+    <plurals name="reminder_days">
+        <item quantity="one">%d giorno prima</item>
+        <item quantity="many">%d giorni prima</item>
+        <item quantity="other">%d giorni prima</item>
+    </plurals>
+    <plurals name="reminder_weeks">
+        <item quantity="one">%d settimana prima</item>
+        <item quantity="many">%d settimanw prima</item>
+        <item quantity="other">%d settimane prima</item>
+    </plurals>
+    <plurals name="duration_minutes">
+        <item quantity="one">%d minuto</item>
+        <item quantity="many">%d minuti</item>
+        <item quantity="other">%d minuti</item>
+    </plurals>
+    <plurals name="duration_hours">
+        <item quantity="one">%d ora</item>
+        <item quantity="many">%d ore</item>
+        <item quantity="other">%d ore</item>
+    </plurals>
+    <plurals name="duration_days">
+        <item quantity="one">%d giorno</item>
+        <item quantity="many">%d giorni</item>
+        <item quantity="other">%d giorni</item>
+    </plurals>
+    <plurals name="duration_weeks">
+        <item quantity="one">%d settimana</item>
+        <item quantity="many">%d settimane</item>
+        <item quantity="other">%d settimane</item>
+    </plurals>
+    <string name="event_untitled">(nessun titolo)</string>
+    <string name="reminder_channel_name">Promemoria evento</string>
+    <string name="event_attendee_resource">Risorsa</string>
+    <string name="reminder_onboarding_title">Non perderti nessun evento</string>
+    <string name="reminder_onboarding_body">Android non mostra i promemoria per gli eventi autonomamente, serve un\'app. Lascia che sia Calendula a farlo.</string>
+    <string name="reminder_benefit_delivery_title">Promemoria, eccoli</string>
+    <string name="reminder_benefit_delivery_body">Tutti i promemoria dei tuoi eventi arrivano tramite notifica, proprio al momento giusto.</string>
+    <string name="reminder_benefit_duplicates_title">Stai usando un\'altra app calendario?</string>
+    <string name="reminder_benefit_duplicates_body">Se un\'altra app manda promemoria li vedrai due volte. Disattivali qui o nell\'altra app.</string>
+    <string name="reminder_benefit_reversible_title">Cambialo in ogni momento</string>
+    <string name="reminder_benefit_reversible_body">Lo switch è nelle Impostazioni, sezione Notifiche.</string>
+    <string name="reminder_onboarding_enable_button">Attiva i promemoria</string>
+    <string name="reminder_onboarding_skip_button">Non ora</string>
+    <string name="reminder_action_snooze">Posponi</string>
+    <string name="reminder_action_dismiss">Ignora</string>
+    <string name="view_month">Mese</string>
+    <string name="view_week">Settimana</string>
+    <string name="view_day">Giorno</string>
+    <string name="view_agenda">Agenda</string>
+    <string name="view_section">Vista</string>
+    <string name="drawer_jump_to_date">Vai alla data</string>
+    <string name="agenda_today_action">Oggi</string>
+    <string name="agenda_header_tomorrow">Domani</string>
+    <string name="agenda_empty_title">Hai fatto tutto</string>
+    <string name="search_action">Cerca</string>
+    <string name="search_hint">Cerca eventi</string>
+    <string name="search_back">Indietro</string>
+    <string name="search_clear">Pulisci</string>
+    <string name="search_idle_hint">Cerca gli eventi per titolo, luogo o note.</string>
+    <string name="search_empty">Nessun risultato per \"%1$s\".</string>
+    <string name="widget_agenda_title">Prossimamente</string>
+    <string name="widget_agenda_label">Agenda Calendula</string>
+    <string name="widget_month_label">Mese Calendula</string>
+    <string name="widget_refresh">Aggiorna</string>
+    <string name="widget_new_event">Nuovo evento</string>
+    <string name="widget_needs_permission">Apri Calendula per concedere l\'accesso al calendario</string>
+    <string name="widget_prev_month">Mese precedente</string>
+    <string name="filter_title">Calendari</string>
+    <string name="settings_section_appearance">Aspetto</string>
+    <string name="settings_theme">Tema</string>
+    <string name="settings_theme_system">Sistema</string>
+    <string name="settings_theme_light">Chiaro</string>
+    <string name="settings_theme_dark">Scuro</string>
+    <string name="settings_default_view">Vista di default</string>
+    <string name="settings_dynamic_color">Colori dinamici</string>
+    <string name="settings_dynamic_color_unavailable">Richiede Android 12 o superiore</string>
+    <string name="settings_week_start">La settimana comincia di</string>
+    <string name="settings_week_start_auto">Automatico</string>
+    <string name="settings_time_format">Formato ora</string>
+    <string name="settings_time_format_auto">Automatico</string>
+    <string name="settings_time_format_12h">12 ore</string>
+    <string name="settings_time_format_24h">24 ore</string>
+    <string name="settings_hour_lines">Righe per le ore</string>
+    <string name="settings_hour_lines_summary">Mostra una riga separatrice per ogni ora nella vista Settimana e Giorno</string>
+    <string name="settings_dim_completed">Attenua gli eventi completati</string>
+    <string name="settings_dim_completed_summary">Attenua gli eventi conclusi nella vista Mese e Settimana</string>
+    <string name="settings_past_events">Eventi passati</string>
+    <string name="settings_past_events_show">Mostra</string>
+    <string name="settings_past_events_dim">Attenua</string>
+    <string name="settings_past_events_hide">Nascondi</string>
+    <string name="settings_agenda_header">Agenda</string>
+    <string name="settings_agenda_range">Intervallo dell\'Agenda</string>
+    <string name="settings_agenda_range_hint">Anticipo con cui vengono visualizzati gli eventi nell\'Agenda.</string>
+    <string name="settings_agenda_widget_range">Intervallo del widget Agenda</string>
+    <string name="settings_agenda_widget_range_hint">Anticipo con cui vengono visualizzati gli eventi nel widget Agenda.</string>
+    <string name="settings_agenda_range_bar">Barra dell\'intervallo</string>
+    <string name="settings_agenda_range_bar_hint">Mostra una barra sopra l\'agenda che indica le date mostrate, con un pulsante per cambiare l\'intervallo scelto per la sessione</string>
+    <string name="agenda_range_day">Oggi</string>
+    <string name="agenda_range_this_month">Questo mese</string>
+    <string name="agenda_range_week">Prossimi 7 giorni</string>
+    <string name="agenda_range_month">Prossimi 30 giorni</string>
+    <string name="agenda_range_custom">Personalizza…</string>
+    <string name="agenda_range_custom_hint">Giorni</string>
+    <string name="agenda_range_override_hint">Solo questa volta, ripristina l\'intervallo salvato al riavvio di Calendula.</string>
+    <string name="agenda_range_showing_label">Mostra tutti gli eventi in arrivo per</string>
+    <plurals name="agenda_range_days">
+        <item quantity="one">%d giorno</item>
+        <item quantity="many">%d giorni</item>
+        <item quantity="other">%d giorni</item>
+    </plurals>
+    <string name="settings_section_event_form">Scheda Nuovo Evento</string>
+    <string name="settings_form_fields_hint">Campi mostrati di default, tutti gli altri saranno in \"Altri campi\"</string>
+    <string name="settings_autofocus_title">Subito al titolo su un nuovo evento</string>
+    <string name="settings_autofocus_title_hint">Quando crei un nuovo evento, posiziona subito il cursore sul campo Titolo e mostra la tastiera.</string>
+    <string name="settings_color_unsupported">Abilita i colori sui calendari non supportati</string>
+    <string name="settings_color_unsupported_hint">Alcuni calendari (e.g. alcuni CalDAV) non pubblicano il set di colori di cui sono dotati; i colori personalizzati assegnati a un evento possono essere persi o sovrascritti alla prossima sincronizzazione. È una limitazione di questo tipo di calendari, Calendula non può farci nulla.</string>
+    <string name="settings_section_notifications">Notifiche</string>
+    <string name="settings_reminders_hint">Vedi promemoria duplicati? Vuol dire che li sta mostrando anche un\'altra app. Disattivali qui o nell\'altra app.</string>
+    <string name="settings_default_reminder_allday">Eventi giornalieri</string>
+    <string name="settings_allday_reminder_time">Ora per i promemoria degli eventi giornalieri</string>
+    <string name="settings_allday_reminder_time_hint">I promemoria per gli eventi giornalieri vengono mandati alle %1$s</string>
+    <string name="reminder_none">Nessuno</string>
+    <string name="reminder_use_default">Usa il promemoria standard</string>
+    <string name="reminder_custom_amount">Valore</string>
+    <string name="reminder_custom_set">Imposta</string>
+    <string name="settings_calendar_reminders_title">Promemoria per calendario</string>
+    <string name="settings_calendar_reminders_hint">Sovrascrivi i reminder standard con reminder specifici per calendario, separati per eventi giornalieri ed eventi ad ore. Ogni calendario può usare i promemoria di default, ignorarli o avere i suoi personalizzati.</string>
+    <string name="settings_calendar_reminder_inherits">Default (%1$s)</string>
+    <string name="settings_reliable_delivery">Notifiche affidabili</string>
+    <string name="settings_reliable_delivery_hint">Android potrebbe posticipare le notifiche per risparmiare batteria. Escludi Calendula così che le notifiche possano arrivare puntuali.</string>
+    <string name="settings_reliable_delivery_exempt">Escludi dall\'ottimizzazione batteria. I promemoria arriveranno puntuali.</string>
+    <string name="settings_snooze_duration">Durata del posticipo</string>
+    <string name="settings_section_calendars">Calendari</string>
+    <string name="settings_manage_calendars">Gestisci calendari</string>
+    <string name="settings_manage_calendars_hint">Crea calendari locali; gestisci quelli sincronizzati</string>
+    <string name="settings_section_language">Lingua</string>
+    <string name="settings_language">Lingua dell\'app</string>
+    <string name="settings_language_auto">Lingua di sistema</string>
+    <string name="settings_translate">Aiuta a tradurre</string>
+    <string name="settings_translate_hint">Aggiungi o migliora una traduzione su Weblate</string>
+    <string name="settings_appearance_subtitle">Tema, vista di default, inizio settimana</string>
+    <string name="settings_event_form_subtitle">Campi di default per nuovi eventi</string>
+    <string name="settings_section_about">A proposito</string>
+    <string name="settings_license">Licenza</string>
+    <string name="settings_license_value">MIT</string>
+    <string name="settings_about_author">da Jean-Luc Makiola</string>
+    <string name="settings_about_source">Sorgente</string>
+    <string name="settings_about_support">Sostieni lo sviluppo</string>
+    <string name="settings_about_version">Versione %1$s</string>
+    <string name="settings_about_logo_desc">Icona dell\'app</string>
+    <string name="settings_report_problem">Segnala un problema</string>
+    <string name="settings_report_problem_hint">Invia un crash report o apri il gestore dei problemi</string>
+    <string name="calendars_title">Calendari</string>
+    <string name="calendars_local_header">I tuoi calendari</string>
+    <string name="calendars_local_empty">Non ci sono ancora calendari locali. Creane uno per avere gli eventi solo su questo dispositivo.</string>
+    <string name="calendars_add">Aggiungi calendario</string>
+    <string name="calendars_disable_hint">.Disattiva un calendario per non vederlo più sull\'app. Non viene cancellato nulla, puoi riattivarlo in qualsiasi momento.</string>
+    <string name="calendars_show_in_app_a11y">Mostra \"%1$s\" nell\'app</string>
+    <string name="calendars_synced_header">Calendari sincronizzati</string>
+    <string name="calendars_synced_hint">Questi vengono dagli account presenti sul tuo dispositivo. Creali e modificali nella loro app.</string>
+    <string name="calendars_manage_in_app">Gestisci in app</string>
+    <string name="calendars_account_menu_a11y">Altre opzioni per %1$s</string>
+    <string name="calendars_enable_all">Attiva tutti</string>
+    <string name="calendars_disable_all">Disattiva tutti</string>
+    <string name="calendars_add_account">Aggiungi account</string>
+    <string name="calendars_new_title">Nuovo calendario</string>
+    <string name="calendars_edit_title">Modifica calendario</string>
+    <string name="calendars_name_label">Nome</string>
+    <string name="calendars_color_label">Colore</string>
+    <string name="calendars_description_hint">Aggiungi descrizione</string>
+    <string name="calendars_delete_confirm_title">Eliminare calendario?</string>
+    <string name="calendars_delete_confirm_message">\"%1$s\" e tutti i suoi eventi saranno definitivamente rimossi da questo dispositivo.</string>
+    <string name="calendars_write_error">Impossibile salvare le modifiche.</string>
+    <string name="calendars_backup_header">Backup</string>
+    <string name="calendars_backup_hint">I calendari locali non vengono sincronizzati da nessuna parte, esportali in un file .ics per conservarne una copia.</string>
+    <string name="calendars_backup_action">Esporta come file .ics</string>
+    <string name="calendars_auto_backup">Backup automatico</string>
+    <string name="calendars_auto_backup_hint">Esporta periodicamente in una cartella i tuoi calendari in formato .ics.</string>
+    <string name="calendars_auto_backup_folder">Cartella di backup</string>
+    <string name="calendars_auto_backup_folder_unset">Scegli una cartella</string>
+    <string name="calendars_auto_backup_interval">Intervallo</string>
+    <string name="calendars_auto_backup_every">Ogni %1$s</string>
+    <string name="calendars_auto_backup_interval_min">Minimo 30 minuti.</string>
+    <string name="calendars_auto_backup_status_never">Backup automatico non attivo</string>
+    <string name="calendars_auto_backup_status_ok">Ultimo backup: %1$s</string>
+    <string name="calendars_auto_backup_status_failed">Ultimo backup fallito: %1$s</string>
+    <string name="backup_channel_name">Backup</string>
+    <string name="backup_channel_description">Avvisa se i backup automatici falliscono ripetutamente.</string>
+    <string name="backup_failed_title">Backup automatico fallito</string>
+    <string name="backup_failed_text">Calendula non è riuscito a esportare il file di backup. Controlla la cartella di backup nelle Impostazioni.</string>
+    <string name="calendars_backup_failed">Impossibile esportare il backup.</string>
+    <plurals name="calendars_backup_done">
+        <item quantity="one">Esportato %d evento.</item>
+        <item quantity="many">Esportati %d eventi.</item>
+        <item quantity="other">Esportati %d eventi.</item>
+    </plurals>
+    <string name="import_title">Importa eventi</string>
+    <string name="import_target_header">Aggiungi al calendario</string>
+    <string name="import_empty">Non ci sono eventi in questo file.</string>
+    <string name="import_failed">Impossibile leggere il file.</string>
+    <string name="import_no_calendar">Non ci sono calendari su cui importare. Crea prima un calendario locale.</string>
+    <string name="import_done_title">Import completato</string>
+    <string name="import_close">Chiudi</string>
+    <string name="import_warning_recurrence">Alcune occorrenze degli eventi ricorrenti, che erano state modificate, sono state saltate.</string>
+    <string name="import_warning_no_start">Un evento senza orario di inizio è stato saltato.</string>
+    <string name="import_warning_attendees">Gli elenchi dei partecipanti non sono stati importati.</string>
+    <string name="import_warning_timezone">Un fuso orario sconosciuto è tornato sul tuo dispositivo.</string>
+    <plurals name="import_event_count">
+        <item quantity="one">%d evento in questo file.</item>
+        <item quantity="many">%d eventi in questo file.</item>
+        <item quantity="other">%d eventi in questo file.</item>
+    </plurals>
+    <plurals name="import_action">
+        <item quantity="one">Importa %d evento</item>
+        <item quantity="many">Importa %d eventi</item>
+        <item quantity="other">Importa %d eventi</item>
+    </plurals>
+    <plurals name="import_done_imported">
+        <item quantity="one">Importato %d evento.</item>
+        <item quantity="many">Importati %d eventi.</item>
+        <item quantity="other">Importati %d eventi.</item>
+    </plurals>
+    <plurals name="import_done_skipped">
+        <item quantity="one">Saltato %d evento già presente nel calendario.</item>
+        <item quantity="many">SaltatI %d eventi già presentI nel calendario.</item>
+        <item quantity="other">SaltatI %d eventi già presentI nel calendario.</item>
+    </plurals>
+    <string name="shortcut_new_event_long">Crea un nuovo evento</string>
+    <string name="qs_tile_new_event_label">Nuovo evento</string>
+    <string name="settings_qs_tile">Aggiungi un toggle nelle Impostazioni Rapide</string>
+    <string name="settings_qs_tile_hint">Aggiungi un toggle \"Nuovo evento\" nel pannello delle Impostazioni Rapide.</string>
+    <string name="crash_dialog_title">Calendula è crashato</string>
+    <string name="crash_dialog_message">Calendula si è chiuso inaspettatamente l\'ultima volta. Puoi contribuire allo sviluppo inviando questo report, che rimane sul tuo dispositivo finchè non scegli di inviarlo e non include informazioni personali o sui tuoi calendari:solo le informazioni tecniche qui sotto.</string>
+    <string name="crash_dialog_report">Report</string>
+    <string name="crash_dialog_dismiss">Non ora</string>
+    <string name="crash_report_issue_title">Crash report</string>
+    <string name="crash_report_clip_label">Calendula crash report</string>
+    <string name="crash_report_copied">Report copiato negli Appunti</string>
+    <string name="crash_report_open_failed">Impossibile aprire il gestore dei problemi. Il report è sugli Appunti.</string>
+    <string name="crash_report_body_template">Grazie per riportare un crash di Calendula. Per favore, aggiungi ogni informazione che ricordi in merito a quello che stavi facendo, quindi invia\n\n### Cosa è successo\n\n\n###Crash report\n%1$s\n</string>
+    <string name="crash_report_body_paste">_(Il report era troppo lungo per questo link - copialo qui dai tuoi Appunti.)_</string>
+    <string name="event_detail_recurrence">Ricorrenza</string>
+    <string name="event_detail_recurring">Evento ricorrente</string>
+    <string name="recurrence_on_days">%1$s da %2$s</string>
+    <string name="recurrence_with_until">%1$s fino a %2$s</string>
+    <string name="recurrence_with_count">%1$s, %2$d volte</string>
+    <string name="reminder_channel_description">Notifiche al momento del promemoria dei tuoi eventi</string>
+    <string name="agenda_header_today">Oggi</string>
+    <string name="widget_next_month">Mese prossimo</string>
+    <string name="widget_today">Oggi</string>
+    <string name="settings_title">Impostazioni</string>
+    <string name="settings_back">Indietro</string>
+    <string name="agenda_range_this_week">Questa settimana</string>
+    <string name="settings_reminders">Promemoria evento</string>
+    <string name="settings_default_reminder">Promemoria standard</string>
+    <string name="settings_notifications_subtitle">Promemoria evento</string>
+    <string name="shortcut_new_event_short">Nuovo evento</string>
+    <string name="event_edit_managed_hint">Gestito da “%1$s” - titolo, data e ripetizioni sono sincronizzate dai tuoi contatti. Promemoria e note sono modificabili dall\'utente</string>
+    <string name="settings_font_headings">Carattere dell\'intestazione</string>
+    <string name="settings_font_body">Carattere del corpo</string>
+    <string name="settings_font_system">Predefinito di sistema</string>
+    <string name="settings_font_choose_file">Scegli file…</string>
+    <string name="settings_font_custom_selected">Carattere personalizzato</string>
+    <string name="settings_font_import_failed">Impossibile leggere il file come font</string>
+    <string name="settings_section_views">Viste</string>
+    <string name="settings_quick_switch_header">Pulsante di cambio rapido</string>
+    <string name="settings_quick_switch_hint">Scegli attraverso quali viste scorrere mediante il pulsante in alto a destra, trascinale per riordinarle. Le viste disattivate rimangono raggiungibili dal menù di navigazione.</string>
+    <string name="settings_drawer_order_header">Menù di navigazione</string>
+    <string name="settings_drawer_order_hint">Trascina per riordinare le viste elencate nel menù di navigazione.</string>
+    <string name="reorder_drag_handle">Trascina per riordinare</string>
+    <string name="settings_views_subtitle">Ordine del pulsante di cambio rapido e del menù</string>
+    <string name="settings_special_dates_subtitle">Compleanni e anniversari dei contatti</string>
+    <string name="settings_section_special_dates">Date speciali dei contatti</string>
+    <string name="settings_special_dates_enable">Mostra date dei contatti</string>
+    <string name="settings_special_dates_enable_hint">Riporta compleanni ed altre date dei tuoi contatti nei calendari locali. Legge i contatti solo su questo dispositivo - niente viene caricato in rete ed i tuoi contatti non vengono mai modificati.</string>
+    <string name="settings_special_dates_type_birthday">Compleanni</string>
+    <string name="settings_special_dates_type_anniversary">Anniversari</string>
+    <string name="settings_special_dates_type_custom">Altre date</string>
+    <string name="settings_special_dates_template">Formato del titolo</string>
+    <string name="settings_special_dates_template_hint">Usa {name} per il contatto e {year} per l\'anno (l\'anno di nascita, o l\'anno di inizio di un anniversario; nascosto se sconosciuto).</string>
+    <string name="settings_special_dates_reminders">Promemoria</string>
+    <string name="settings_special_dates_show_year">Mostra anno</string>
+    <string name="settings_special_dates_show_year_hint">Include {year} nei titoli quando è noto</string>
+    <string name="settings_special_dates_sync_now">Sincronizza adesso</string>
+    <string name="settings_special_dates_never_synced">Ancora non sincronizzato</string>
+    <string name="settings_special_dates_last_synced">%1$s è un tempo relativo, per esempio \"5 minuti fa\"</string>
+    <string name="settings_special_dates_calendar_hint">Imposta colore e visibilità di ogni calendario nelle impostazioni dei calendari.</string>
+    <string name="settings_special_dates_paused_title">In pausa</string>
+    <string name="settings_special_dates_paused_hint">Calendula non può più leggere i tuoi contatti, quindi questi calendari non vengono aggiornati.</string>
+    <string name="settings_special_dates_grant">Concedi accesso</string>
+    <string name="settings_special_dates_disable_title">Disattivare date dei contatti?</string>
+    <string name="settings_special_dates_disable_all_message">Questo cancella i calendari delle date dei contatti ed i loro eventi. Ogni promemoria o note che erano stati aggiunti saranno persi.</string>
+    <string name="settings_special_dates_disable_type_message">Questo cancella il calendario “%1$s” ed i suoi eventi. Ogni promemoria o note che erano stati aggiunti saranno persi.</string>
+    <string name="settings_special_dates_disable_confirm">Spegni</string>
+    <string name="dialog_save">Salva</string>
 </resources>

app/src/main/res/values-zh-rCN/strings.xml

@@ -0,0 +1,122 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string-array name="backup_interval_units">
+        <item>Minutes</item>
+        <item>Hours</item>
+        <item>Days</item>
+        <item>Weeks</item>
+    </string-array>
+    <string name="app_name">Calendula</string>
+    <string name="app_tagline">一个现代化的日历应用</string>
+    <string name="state_loading">加载中…</string>
+    <string name="state_retry">推迟</string>
+    <string name="state_failure_unknown">错误!</string>
+    <string name="state_failure_permission">需要日历权限</string>
+    <string name="state_failure_permission_action">授予访问权限</string>
+    <string name="state_failure_no_calendars">无已设置的日历</string>
+    <string name="state_failure_no_calendars_action">打开系统日历设置</string>
+    <string name="state_failure_provider">无法读取日历</string>
+    <string name="permission_rationale_title">优雅地查看你的所有活动</string>
+    <string name="permission_rationale_body">Calendula需要获取权限来访问您的日历来展示和管理您的活动。所有权限均会在使用前申请——不必担心隐私泄露。</string>
+    <string name="permission_request_button">授予日历权限</string>
+    <string name="permission_denied_title">日历权限不可用</string>
+    <string name="permission_denied_body">Calendula 无法显示没有日历访问权限的事件。你可以在系统设置里再次授予它。</string>
+    <string name="permission_open_settings_button">打开系统设置</string>
+    <string name="permission_retry_button">重试</string>
+    <string name="permission_benefit_private_title">保留在设备</string>
+    <string name="permission_benefit_private_body">您的日历数据将会在本地读取，而不会被上传。</string>
+    <string name="permission_benefit_sync_title">所有日历</string>
+    <string name="permission_benefit_sync_body">Google、CalDAV、本地设备——任何同步到设备的东西都会直接显示出来。</string>
+    <string name="permission_benefit_privacy_title">无追踪器</string>
+    <string name="permission_benefit_privacy_body">零遥测，零分析，没有广告。</string>
+    <string name="permission_privacy_footnote">数据仅保留在本地设备 ·无网络权限</string>
+    <string name="month_prev">上个月</string>
+    <string name="month_next">下个月</string>
+    <string name="month_today_action">今天</string>
+    <string name="month_more_actions">更多选项</string>
+    <string name="month_open_menu">打开菜单</string>
+    <string name="month_action_settings">设置</string>
+    <string name="month_a11y_today_prefix">今天</string>
+    <string name="week_today_action">本周</string>
+    <string name="day_today_action">今天</string>
+    <string name="event_detail_back">返回</string>
+    <string name="event_detail_edit">编辑</string>
+    <string name="event_detail_delete">删除</string>
+    <string name="event_detail_share">分享</string>
+    <string name="event_share_chooser_title">分享活动</string>
+    <string name="event_share_failed">无法分享该活动。</string>
+    <string name="event_delete_title">删除活动？</string>
+    <string name="event_delete_body">该活动将从你的日历以及所有同步设备中移除。</string>
+    <string name="event_delete_recurring_title">删除重复活动</string>
+    <string name="event_delete_option_occurrence">仅该活动</string>
+    <string name="event_delete_option_following">当前及接下来的所有活动</string>
+    <string name="event_delete_option_series">系列中的所有活动</string>
+    <string name="event_edit_recurring_title">编辑重复活动</string>
+    <string name="event_delete_failed">无法删除该活动</string>
+    <string name="event_delete_write_denied">Calendula需要权限读取或删除活动</string>
+    <string name="dialog_cancel">取消</string>
+    <string name="dialog_ok">确认</string>
+    <string name="event_edit_new_title">新活动</string>
+    <string name="event_edit_close">关闭</string>
+    <string name="event_edit_save">保存</string>
+    <string name="event_edit_title_hint">增加标题</string>
+    <string name="event_edit_managed_hint">由“%1$s”管理——标题、日期和重复内容会与你的联系人保持同步。提醒、位置和笔记由你自行编辑。</string>
+    <string name="event_edit_starts">开始</string>
+    <string name="event_edit_ends">结束</string>
+    <string name="event_edit_error_end_before_start">报错：结束时间早于起始时间</string>
+    <string name="event_edit_error_no_calendar">无可写入的日历</string>
+    <string name="event_edit_save_failed">无法保存该活动</string>
+    <string name="event_edit_write_denied">Calendula需要写入权限来创建活动</string>
+    <string name="event_edit_more_fields">其他领域</string>
+    <string name="event_edit_add">新增</string>
+    <string name="event_edit_add_reminder">新建提醒</string>
+    <string name="event_edit_remove_reminder">移除提醒</string>
+    <string name="event_edit_attendees">访问者</string>
+    <string name="event_edit_add_guest">新增访问者</string>
+    <string name="event_edit_add_guest_hint">通过 Email 新增一个访问者…</string>
+    <string name="event_edit_add_guest_from_contacts">从联系人中添加访问者</string>
+    <string name="event_edit_location_from_contacts">从联系人中添加地址</string>
+    <string name="event_edit_remove_guest">移除访问者</string>
+    <string name="event_edit_attendee_required">必填</string>
+    <string name="event_edit_attendee_optional">可选项</string>
+    <string name="event_edit_attendees_note_synced">Calendula 不发送邀请函。你的日历账户同步时可能会给访客发邮件。</string>
+    <string name="event_edit_attendees_note_local">保存在本设备，其他访客不会被提醒。</string>
+    <string name="event_edit_reminder_custom">自定义</string>
+    <string name="reminder_unit_minutes">分钟</string>
+    <string name="reminder_unit_hours">小时</string>
+    <string name="reminder_unit_days">天</string>
+    <string name="reminder_unit_weeks">周</string>
+    <string name="event_edit_availability">空闲</string>
+    <string name="event_edit_visibility">隐私设置</string>
+    <string name="event_edit_color">色彩</string>
+    <string name="event_edit_color_default">日历颜色</string>
+    <string name="event_edit_color_custom">自定义颜色</string>
+    <string name="event_edit_color_reset">重置</string>
+    <string name="event_edit_color_unsupported">该日历不可用</string>
+    <string name="event_edit_color_unsupported_hint">此日历未设置任何颜色集。您可以在“设置”中为此类日历启用自定义颜色。</string>
+    <string name="event_edit_color_sync_warning">该日历在下一次同步时可能会删除或覆盖该颜色。</string>
+    <string name="event_edit_conflict_title">其他设备的活动已更改</string>
+    <string name="event_edit_conflict_body">您在编辑时，该事件已被同步或其他应用修改。您的修改要怎么处理？</string>
+    <string name="event_edit_conflict_overwrite">保存我的更改</string>
+    <string name="event_edit_conflict_overwrite_hint">仅您编辑的字段会覆盖外部更改</string>
+    <string name="event_edit_conflict_discard">丢弃我的更改</string>
+    <string name="event_edit_conflict_discard_hint">该活动保持现状</string>
+    <string name="event_edit_gone_title">活动被删除</string>
+    <string name="event_edit_gone_body">这个事件在您编辑期间已被删除了（比如在另一台设备上）。您的修改现在无法保存。</string>
+    <string name="event_edit_recurrence_none">确认无需重复</string>
+    <string name="event_edit_recurrence_custom">自定义</string>
+    <string name="event_edit_recurrence_every">每</string>
+    <string name="recurrence_unit_days">天</string>
+    <string name="recurrence_unit_weeks">周</string>
+    <string name="recurrence_unit_months">月</string>
+    <string name="recurrence_unit_years">年</string>
+    <string name="event_edit_recurrence_ends">结束时间</string>
+    <string name="event_edit_recurrence_end_never">从不</string>
+    <string name="event_edit_recurrence_end_until">于指定日期</string>
+    <string name="event_edit_recurrence_end_count">重复几次后</string>
+    <string name="event_edit_recurrence_times">次</string>
+    <string name="event_edit_error_recurrence_ends_before_start">报错：结束日期早于开始日期</string>
+    <string name="event_availability_busy">占用中</string>
+    <string name="event_access_default">默认</string>
+    <string name="event_access_public">公开</string>
+</resources>

app/src/main/res/values/strings.xml

@@ -14,7 +14,7 @@
 
     <!-- Permission flow (F1) -->
     <string name="permission_rationale_title">See all your events, beautifully</string>
-    <string name="permission_rationale_body">Calendula needs access to your calendar to show and manage your events. That\'s the only thing it ever asks for.</string>
+    <string name="permission_rationale_body">Calendula needs access to your calendar to show and manage your events. That\'s all it asks for up front — and nothing ever leaves your device.</string>
     <string name="permission_request_button">Grant calendar access</string>
     <string name="permission_denied_title">Calendar access denied</string>
     <string name="permission_denied_body">Calendula cannot show events without calendar access. You can grant it again in the system settings.</string>
@@ -68,6 +68,8 @@
     <string name="event_edit_close">Close</string>
     <string name="event_edit_save">Save</string>
     <string name="event_edit_title_hint">Add title</string>
+    <!-- %1$s is the managing calendar's name, e.g. "Birthdays". -->
+    <string name="event_edit_managed_hint">Managed by “%1$s” — the title, date and repeat are kept in sync from your contacts. Reminders, location and notes are yours to edit.</string>
     <string name="event_edit_starts">Starts</string>
     <string name="event_edit_ends">Ends</string>
     <string name="event_edit_error_end_before_start">Ends before it starts</string>
@@ -360,6 +362,35 @@
     <string name="settings_views_subtitle">Quick-switch button and menu order</string>
     <string name="settings_event_form_subtitle">Default fields for new events</string>
     <string name="settings_notifications_subtitle">Event reminders</string>
+    <string name="settings_special_dates_subtitle">Contact birthdays &amp; anniversaries</string>
+
+    <!-- Contact special dates (issue #15) -->
+    <string name="settings_section_special_dates">Contact special dates</string>
+    <string name="settings_special_dates_enable">Show contact dates</string>
+    <string name="settings_special_dates_enable_hint">Mirror your contacts\' birthdays and other dates into local calendars. Reads contacts on this device only — nothing is uploaded, and your contacts are never changed.</string>
+    <string name="settings_special_dates_type_birthday">Birthdays</string>
+    <string name="settings_special_dates_type_anniversary">Anniversaries</string>
+    <string name="settings_special_dates_type_custom">Other dates</string>
+    <string name="settings_special_dates_template">Title format</string>
+    <string name="settings_special_dates_template_hint">Use {name} for the contact and {year} for the year (the birth year, or an anniversary\'s start year; hidden when unknown).</string>
+    <string name="settings_special_dates_reminders">Reminders</string>
+    <string name="settings_special_dates_show_year">Show year</string>
+    <string name="settings_special_dates_show_year_hint">Include {year} in titles when it is known</string>
+    <string name="settings_special_dates_sync_now">Sync now</string>
+    <string name="settings_special_dates_never_synced">Not synced yet</string>
+    <!-- %1$s is a relative time, e.g. "5 minutes ago". -->
+    <string name="settings_special_dates_last_synced">Last synced %1$s</string>
+    <string name="settings_special_dates_calendar_hint">Set each calendar\'s colour and visibility in Calendars settings.</string>
+    <string name="settings_calendar_reminders_managed_hint">Set in Contact special dates</string>
+    <string name="settings_special_dates_paused_title">Paused</string>
+    <string name="settings_special_dates_paused_hint">Calendula can no longer read your contacts, so these calendars aren\'t updating.</string>
+    <string name="settings_special_dates_grant">Grant access</string>
+    <string name="settings_special_dates_disable_title">Turn off contact dates?</string>
+    <string name="settings_special_dates_disable_all_message">This deletes the contact-date calendars and their events. Any reminders or notes you added to them will be lost.</string>
+    <!-- %1$s is the date type, e.g. "Birthdays". -->
+    <string name="settings_special_dates_disable_type_message">This deletes the “%1$s” calendar and its events. Any reminders or notes you added to them will be lost.</string>
+    <string name="settings_special_dates_disable_confirm">Turn off</string>
+    <string name="dialog_save">Save</string>
     <string name="settings_section_about">About</string>
     <string name="settings_license">License</string>
     <string name="settings_license_value">MIT</string>
@@ -478,4 +509,13 @@
     <string name="crash_report_body_paste">_(The report was too long for this link — paste it from your clipboard here.)_</string>
     <string name="report_issue_url" translatable="false">https://codeberg.org/jlmakiola/calendula/issues/new</string>
     <string name="report_issue_choose_url" translatable="false">https://codeberg.org/jlmakiola/calendula/issues/new/choose</string>
+
+    <!-- Contact special dates (issue #15). {name} is the contact, {age} the age
+         at the upcoming date (dropped when the year is unknown or Show age is off). -->
+    <string name="special_dates_calendar_birthday">Birthdays</string>
+    <string name="special_dates_calendar_anniversary">Anniversaries</string>
+    <string name="special_dates_calendar_custom">Special dates</string>
+    <string name="special_dates_default_title_birthday">{name}\'s birthday ({year})</string>
+    <string name="special_dates_default_title_anniversary">{name}\'s anniversary ({year})</string>
+    <string name="special_dates_default_title_custom">{name}</string>
 </resources>

app/src/main/res/xml/locales_config.xml

@@ -10,4 +10,6 @@
 <locale-config xmlns:android="http://schemas.android.com/apk/res/android">
     <locale android:name="en" />
     <locale android:name="de" />
+    <locale android:name="es" />
+    <locale android:name="it" />
 </locale-config>

app/src/test/java/de/jeanlucmakiola/calendula/data/calendar/AllDayReminderEncodingTest.kt

@@ -83,6 +83,43 @@ class AllDayReminderEncodingTest {
         assertThat(toProviderAllDayMinutes(-1, summer, berlin, nineAm)).isEqualTo(-1)
     }
 
+    @Test
+    fun `next yearly occurrence wraps to next year once this year's date has passed`() {
+        val today = LocalDate.of(2026, 8, 1)
+        assertThat(nextYearlyOccurrence(5, 14, today)).isEqualTo(LocalDate.of(2027, 5, 14))
+        assertThat(nextYearlyOccurrence(12, 25, today)).isEqualTo(LocalDate.of(2026, 12, 25))
+    }
+
+    @Test
+    fun `next yearly occurrence returns today when the date is today`() {
+        val today = LocalDate.of(2026, 3, 10)
+        assertThat(nextYearlyOccurrence(3, 10, today)).isEqualTo(today)
+    }
+
+    @Test
+    fun `next yearly occurrence skips non-leap years for a Feb-29 date`() {
+        assertThat(nextYearlyOccurrence(2, 29, LocalDate.of(2026, 6, 1)))
+            .isEqualTo(LocalDate.of(2028, 2, 29))
+    }
+
+    @Test
+    fun `sampling the offset at the next occurrence, not a 1972 anchor, fixes the fire hour`() {
+        // A year-less birthday's DTSTART anchor is 1972 (Berlin had no DST then,
+        // UTC+1). Sampling the offset there skews a modern CEST occurrence by an
+        // hour; sampling at the upcoming occurrence fires at the intended time.
+        val anchor1972 = LocalDate.of(1972, 7, 15)
+        val nextOccurrence = nextYearlyOccurrence(7, 15, LocalDate.of(2026, 6, 1)) // 2026-07-15, CEST
+        val rawFromAnchor = toProviderAllDayMinutes(0, anchor1972, berlin, nineAm)
+        val rawFromNext = toProviderAllDayMinutes(0, nextOccurrence, berlin, nineAm)
+
+        val fireFromAnchor = actualFire(rawFromAnchor, nextOccurrence)
+            .let(java.time.Instant::ofEpochMilli).atZone(berlin).toLocalTime()
+        val fireFromNext = actualFire(rawFromNext, nextOccurrence)
+            .let(java.time.Instant::ofEpochMilli).atZone(berlin).toLocalTime()
+        assertThat(fireFromAnchor).isEqualTo(LocalTime.of(10, 0)) // skewed +1h
+        assertThat(fireFromNext).isEqualTo(LocalTime.of(9, 0)) // correct
+    }
+
     @Test
     fun `a winter-anchored offset drifts one hour on a summer occurrence`() {
         // Known limitation: one fixed MINUTES per series can't track DST. An

app/src/test/java/de/jeanlucmakiola/calendula/data/calendar/EventDetailMapperTest.kt

@@ -22,8 +22,8 @@ class EventDetailMapperTest {
         eventColor: Any? = null,
         eventColorKey: String? = null,
         calendarColor: Int = 0xFFAABBCC.toInt(),
-        dtstart: Long = 1_000_000_000L,
+        dtstart: Long? = 1_000_000_000L,
-        dtend: Long = 1_000_003_600L,
+        dtend: Long? = 1_000_003_600L,
         allDay: Int = 0,
         location: String? = "Berlin",
         calendarId: Long = 7L,
@@ -120,9 +120,31 @@ class EventDetailMapperTest {
     }
 
     @Test
-    fun `dtend before dtstart drops detail`() {
+    fun `dtend before dtstart is clamped to a zero-length event, not dropped`() {
+        // A backwards DTEND is malformed, but dropping it would make the event
+        // un-openable (the "Something went wrong" trap, same as issue #34); keep
+        // it as a zero-length event so the user can still open and fix it.
         val detail = detailReader(dtstart = 2000L, dtend = 1000L).toDetail()
-        assertThat(detail).isNull()
+        assertThat(detail).isNotNull()
+        assertThat(detail!!.instance.start.toEpochMilliseconds()).isEqualTo(2000L)
+        assertThat(detail.instance.end.toEpochMilliseconds()).isEqualTo(2000L)
+    }
+
+    @Test
+    fun `pre-1970 negative dtstart is kept, not dropped (issue #34)`() {
+        // A yearly birthday/anniversary anchored before the epoch has a
+        // legitimately negative UTC epoch-millis DTSTART; recurring rows carry
+        // no DTEND (they use DURATION), so it stays end == begin.
+        val begin = -157_766_400_000L // 1965-01-01T00:00:00Z
+        val detail = detailReader(dtstart = begin, dtend = null).toDetail()
+        assertThat(detail).isNotNull()
+        assertThat(detail!!.instance.start.toEpochMilliseconds()).isEqualTo(begin)
+        assertThat(detail.instance.end.toEpochMilliseconds()).isEqualTo(begin)
+    }
+
+    @Test
+    fun `absent dtstart drops detail`() {
+        assertThat(detailReader(dtstart = null).toDetail()).isNull()
     }
 
     @Test

app/src/test/java/de/jeanlucmakiola/calendula/data/calendar/FakeCalendarDataSource.kt

@@ -1,12 +1,15 @@
 package de.jeanlucmakiola.calendula.data.calendar
 
+import android.provider.CalendarContract
 import de.jeanlucmakiola.calendula.domain.CalendarSource
 import de.jeanlucmakiola.calendula.domain.EventColorOption
 import de.jeanlucmakiola.calendula.domain.EventDetail
 import de.jeanlucmakiola.calendula.domain.EventForm
 import de.jeanlucmakiola.calendula.domain.EventInstance
+import de.jeanlucmakiola.calendula.domain.contacts.SpecialDateType
 import de.jeanlucmakiola.calendula.domain.ics.IcsEvent
 import de.jeanlucmakiola.calendula.domain.ics.ParsedIcsEvent
+import java.time.ZoneId
 
 /**
  * Test-only fake. Tunable via the three `var` properties; `tick()` simulates
@@ -83,6 +86,8 @@ internal class FakeCalendarDataSource : CalendarDataSource {
     override fun deleteCalendar(id: Long) {
         writeError?.let { throw it }
         deletedCalendarIds += id
+        managedCalendarRows.removeAll { it.id == id }
+        managedEvents.remove(id)
     }
 
     /** All-day reminder fire-time minute-of-day passed into the last write. */
@@ -139,6 +144,80 @@ internal class FakeCalendarDataSource : CalendarDataSource {
     override fun deleteEvent(eventId: Long) {
         writeError?.let { throw it }
         deletedEventIds += eventId
+        managedEvents.values.forEach { rows -> rows.removeAll { it.eventId == eventId } }
+    }
+
+    // --- Managed special-dates surface (stateful, so a re-sync sees inserts) ---
+
+    var nextManagedEventId: Long = 1_000L
+    private var managedCalendarSeq: Long = 700L
+    private val managedCalendarRows = mutableListOf<ManagedCalendarRow>()
+    private val managedEvents = mutableMapOf<Long, MutableList<ManagedEventRow>>()
+
+    data class CreatedManagedCalendar(val displayName: String, val color: Int, val type: SpecialDateType)
+    val createdManagedCalendars = mutableListOf<CreatedManagedCalendar>()
+    val insertedManagedEvents = mutableListOf<Pair<EventForm, String>>()
+    val updatedManagedFields = mutableListOf<Pair<Long, Map<String, Any?>>>()
+
+    /** Preset an orphan managed calendar (e.g. to test adoption after a prefs wipe). */
+    fun presetManagedCalendar(id: Long, type: SpecialDateType) {
+        managedCalendarRows += ManagedCalendarRow(id, type)
+        managedEvents.getOrPut(id) { mutableListOf() }
+    }
+
+    override fun createManagedCalendar(displayName: String, color: Int, type: SpecialDateType): Long {
+        writeError?.let { throw it }
+        createdManagedCalendars += CreatedManagedCalendar(displayName, color, type)
+        val id = managedCalendarSeq++
+        managedCalendarRows += ManagedCalendarRow(id, type)
+        managedEvents.getOrPut(id) { mutableListOf() }
+        return id
+    }
+
+    override fun findManagedCalendars(): List<ManagedCalendarRow> = managedCalendarRows.toList()
+
+    override fun queryManagedEvents(calendarId: Long): List<ManagedEventRow> =
+        managedEvents[calendarId]?.toList() ?: emptyList()
+
+    override fun insertManagedEvent(form: EventForm, uid: String, allDayReminderTimeMinutes: Int): Long {
+        writeError?.let { throw it }
+        insertedManagedEvents += form to uid
+        allDayReminderTimes += allDayReminderTimeMinutes
+        val id = nextManagedEventId++
+        val times = form.toWriteTimes(ZoneId.systemDefault())
+        managedEvents.getOrPut(requireNotNull(form.calendarId)) { mutableListOf() } +=
+            ManagedEventRow(id, uid, form.title.trim(), times.dtStartMillis, form.rrule)
+        return id
+    }
+
+    /** (calendarId, allDayTime, minutes) recorded from applyManagedCalendarReminders. */
+    val appliedManagedReminders = mutableListOf<Triple<Long, Int, List<Int>>>()
+
+    override fun applyManagedCalendarReminders(
+        calendarId: Long,
+        allDayReminderTimeMinutes: Int,
+        minutes: List<Int>,
+    ) {
+        writeError?.let { throw it }
+        appliedManagedReminders += Triple(calendarId, allDayReminderTimeMinutes, minutes)
+    }
+
+    override fun updateManagedFields(eventId: Long, values: Map<String, Any?>) {
+        writeError?.let { throw it }
+        if (values.isEmpty()) return
+        updatedManagedFields += eventId to values
+        managedEvents.values.forEach { rows ->
+            val idx = rows.indexOfFirst { it.eventId == eventId }
+            if (idx >= 0) {
+                var row = rows[idx]
+                (values[CalendarContract.Events.TITLE] as? String)?.let { row = row.copy(title = it) }
+                (values[CalendarContract.Events.DTSTART] as? Long)?.let { row = row.copy(dtStartMillis = it) }
+                if (values.containsKey(CalendarContract.Events.RRULE)) {
+                    row = row.copy(rrule = values[CalendarContract.Events.RRULE] as? String)
+                }
+                rows[idx] = row
+            }
+        }
     }
 
     override fun deleteOccurrence(eventId: Long, beginMillis: Long) {

app/src/test/java/de/jeanlucmakiola/calendula/data/calendar/SearchMapperTest.kt

@@ -0,0 +1,45 @@
+package de.jeanlucmakiola.calendula.data.calendar
+
+import com.google.common.truth.Truth.assertThat
+import org.junit.jupiter.api.Test
+
+class SearchMapperTest {
+
+    private fun searchReader(
+        id: Long = 1L,
+        calendarId: Long = 7L,
+        title: String? = "Birthday",
+        dtstart: Long? = 1_000_000_000L,
+        dtend: Long? = null,
+        duration: String? = "P1D",
+        allDay: Int = 1,
+        eventColor: Any? = null,
+        calendarColor: Int = 0xFFAABBCC.toInt(),
+        location: String? = null,
+    ): MapColumnReader = MapColumnReader(
+        SearchProjection.IDX_ID to id,
+        SearchProjection.IDX_CALENDAR_ID to calendarId,
+        SearchProjection.IDX_TITLE to title,
+        SearchProjection.IDX_DTSTART to dtstart,
+        SearchProjection.IDX_DTEND to dtend,
+        SearchProjection.IDX_DURATION to duration,
+        SearchProjection.IDX_ALL_DAY to allDay,
+        SearchProjection.IDX_EVENT_COLOR to eventColor,
+        SearchProjection.IDX_CALENDAR_COLOR to calendarColor,
+        SearchProjection.IDX_LOCATION to location,
+    )
+
+    @Test
+    fun `pre-1970 negative dtstart still surfaces in search (issue #34)`() {
+        val begin = -157_766_400_000L // 1965-01-01T00:00:00Z
+        val result = searchReader(dtstart = begin, dtend = null, duration = "P1D").toSearchResult()
+        assertThat(result).isNotNull()
+        assertThat(result!!.start.toEpochMilliseconds()).isEqualTo(begin)
+        assertThat(result.title).isEqualTo("Birthday")
+    }
+
+    @Test
+    fun `absent dtstart drops the search hit`() {
+        assertThat(searchReader(dtstart = null).toSearchResult()).isNull()
+    }
+}

app/src/test/java/de/jeanlucmakiola/calendula/data/contacts/SpecialDatesSyncEngineTest.kt

@@ -0,0 +1,226 @@
+package de.jeanlucmakiola.calendula.data.contacts
+
+import android.provider.CalendarContract
+import androidx.datastore.core.DataStore
+import androidx.datastore.preferences.core.PreferenceDataStoreFactory
+import androidx.datastore.preferences.core.Preferences
+import com.google.common.truth.Truth.assertThat
+import de.jeanlucmakiola.calendula.data.calendar.FakeCalendarDataSource
+import de.jeanlucmakiola.calendula.data.calendar.ManagedEventRow
+import de.jeanlucmakiola.calendula.data.prefs.CalendarReminderOverride
+import de.jeanlucmakiola.calendula.data.prefs.SettingsPrefs
+import de.jeanlucmakiola.calendula.domain.contacts.ContactSpecialDate
+import de.jeanlucmakiola.calendula.domain.contacts.SpecialDateType
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.test.runTest
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.io.TempDir
+import java.nio.file.Path
+
+class SpecialDatesSyncEngineTest {
+
+    private class FakeContacts(
+        var permission: Boolean = true,
+        var dates: List<ContactSpecialDate> = emptyList(),
+    ) : ContactSpecialDatesDataSource {
+        override fun hasPermission() = permission
+        override fun readSpecialDates() = dates
+    }
+
+    private class FakeSpec : SpecialDatesCalendarSpec {
+        override fun displayName(type: SpecialDateType) = type.name
+        override fun color(type: SpecialDateType) = 0xFF112233.toInt()
+        override fun defaultTitleTemplate(type: SpecialDateType) = when (type) {
+            SpecialDateType.Birthday -> "{name}'s birthday ({year})"
+            SpecialDateType.Anniversary -> "{name}'s anniversary"
+            SpecialDateType.Custom -> "{name}"
+        }
+    }
+
+    private fun prefs(tempDir: Path): SettingsPrefs {
+        val store: DataStore<Preferences> = PreferenceDataStoreFactory.create(
+            produceFile = { tempDir.resolve("settings_test.preferences_pb").toFile() },
+        )
+        return SettingsPrefs(store)
+    }
+
+    private fun birthday(key: String, name: String, month: Int, day: Int, year: Int?) =
+        ContactSpecialDate(key, name, SpecialDateType.Birthday, month, day, year)
+
+    private suspend fun engineWith(
+        tempDir: Path,
+        contacts: FakeContacts,
+        calendars: FakeCalendarDataSource = FakeCalendarDataSource(),
+        enabled: Boolean = true,
+    ): Pair<SpecialDatesSyncEngine, SettingsPrefs> {
+        val settings = prefs(tempDir)
+        if (enabled) settings.setSpecialDatesEnabled(true)
+        return SpecialDatesSyncEngine(contacts, calendars, settings, FakeSpec()) to settings
+    }
+
+    @Test
+    fun `disabled feature is a no-op`(@TempDir tempDir: Path) = runTest {
+        val calendars = FakeCalendarDataSource()
+        val (engine, _) = engineWith(tempDir, FakeContacts(), calendars, enabled = false)
+        assertThat(engine.sync()).isEqualTo(SpecialDatesSyncResult.Disabled)
+        assertThat(calendars.createdManagedCalendars).isEmpty()
+    }
+
+    @Test
+    fun `missing permission reports stalled without touching calendars`(@TempDir tempDir: Path) = runTest {
+        val calendars = FakeCalendarDataSource()
+        val (engine, _) = engineWith(tempDir, FakeContacts(permission = false), calendars)
+        assertThat(engine.sync()).isEqualTo(SpecialDatesSyncResult.PermissionMissing)
+        assertThat(calendars.createdManagedCalendars).isEmpty()
+    }
+
+    @Test
+    fun `first sync creates calendars and inserts one event per contact`(@TempDir tempDir: Path) = runTest {
+        val calendars = FakeCalendarDataSource()
+        val contacts = FakeContacts(
+            dates = listOf(
+                birthday("a", "Jane", 5, 14, 1990),
+                birthday("b", "Bob", 12, 25, null),
+            ),
+        )
+        val (engine, settings) = engineWith(tempDir, contacts, calendars)
+
+        assertThat(engine.sync()).isEqualTo(SpecialDatesSyncResult.Success)
+        // All three type calendars exist; the birthday one holds both contacts.
+        assertThat(calendars.createdManagedCalendars.map { it.type })
+            .containsExactlyElementsIn(SpecialDateType.entries)
+        assertThat(calendars.insertedManagedEvents).hasSize(2)
+        assertThat(calendars.insertedManagedEvents.map { it.second })
+            .containsExactly("contact-birthday:a@calendula", "contact-birthday:b@calendula")
+        // Year-less contact drops the year; year-known keeps it.
+        val titles = calendars.insertedManagedEvents.map { it.first.title }
+        assertThat(titles).contains("Jane's birthday (1990)")
+        assertThat(titles).contains("Bob's birthday")
+        // Calendar ids were persisted for the editor / next sync.
+        assertThat(settings.specialDatesCalendars.first()).containsKey(SpecialDateType.Birthday)
+    }
+
+    @Test
+    fun `a second sync with no changes writes nothing`(@TempDir tempDir: Path) = runTest {
+        val calendars = FakeCalendarDataSource()
+        val contacts = FakeContacts(dates = listOf(birthday("a", "Jane", 5, 14, 1990)))
+        val (engine, _) = engineWith(tempDir, contacts, calendars)
+
+        engine.sync()
+        val insertsAfterFirst = calendars.insertedManagedEvents.size
+        val calendarsAfterFirst = calendars.createdManagedCalendars.size
+        engine.sync()
+
+        assertThat(calendars.insertedManagedEvents).hasSize(insertsAfterFirst)
+        assertThat(calendars.createdManagedCalendars).hasSize(calendarsAfterFirst)
+        assertThat(calendars.updatedManagedFields).isEmpty()
+        assertThat(calendars.deletedEventIds).isEmpty()
+    }
+
+    @Test
+    fun `a renamed contact triggers a title-only managed update`(@TempDir tempDir: Path) = runTest {
+        val calendars = FakeCalendarDataSource()
+        val contacts = FakeContacts(dates = listOf(birthday("a", "Jane", 5, 14, 1990)))
+        val (engine, _) = engineWith(tempDir, contacts, calendars)
+        engine.sync()
+
+        contacts.dates = listOf(birthday("a", "Janet", 5, 14, 1990))
+        engine.sync()
+
+        assertThat(calendars.updatedManagedFields).hasSize(1)
+        val (_, columns) = calendars.updatedManagedFields.single()
+        // Only managed columns are ever written — never reminders/location.
+        assertThat(columns.keys).containsExactly(CalendarContract.Events.TITLE)
+        assertThat(columns[CalendarContract.Events.TITLE]).isEqualTo("Janet's birthday (1990)")
+    }
+
+    @Test
+    fun `a removed contact deletes its event`(@TempDir tempDir: Path) = runTest {
+        val calendars = FakeCalendarDataSource()
+        val contacts = FakeContacts(dates = listOf(birthday("a", "Jane", 5, 14, 1990)))
+        val (engine, _) = engineWith(tempDir, contacts, calendars)
+        engine.sync()
+
+        contacts.dates = emptyList()
+        engine.sync()
+
+        assertThat(calendars.deletedEventIds).hasSize(1)
+    }
+
+    @Test
+    fun `disabling a type deletes its calendar on the next sync`(@TempDir tempDir: Path) = runTest {
+        val calendars = FakeCalendarDataSource()
+        val (engine, settings) = engineWith(tempDir, FakeContacts(), calendars)
+        engine.sync()
+        val anniversaryId = settings.specialDatesCalendars.first().getValue(SpecialDateType.Anniversary)
+
+        settings.setSpecialDateTypeEnabled(SpecialDateType.Anniversary, false)
+        engine.sync()
+
+        assertThat(calendars.deletedCalendarIds).contains(anniversaryId)
+        assertThat(settings.specialDatesCalendars.first()).doesNotContainKey(SpecialDateType.Anniversary)
+    }
+
+    @Test
+    fun `applyReminders persists the override and applies it to all events`(@TempDir tempDir: Path) = runTest {
+        val calendars = FakeCalendarDataSource()
+        val contacts = FakeContacts(dates = listOf(birthday("a", "Jane", 5, 14, 1990)))
+        val (engine, settings) = engineWith(tempDir, contacts, calendars)
+        engine.sync()
+        val birthdayCal = settings.specialDatesCalendars.first().getValue(SpecialDateType.Birthday)
+
+        engine.applyReminders(SpecialDateType.Birthday, CalendarReminderOverride.Minutes(listOf(0, 1440)))
+
+        // Persisted as the per-calendar all-day override (so new events match)...
+        assertThat(settings.perCalendarAllDayReminderOverride.first()[birthdayCal])
+            .isEqualTo(listOf(0, 1440))
+        // ...and applied to the existing events in that calendar.
+        assertThat(calendars.appliedManagedReminders).contains(
+            Triple(birthdayCal, settings.allDayReminderTimeMinutes.first(), listOf(0, 1440)),
+        )
+    }
+
+    @Test
+    fun `applyReminders with None clears the reminders`(@TempDir tempDir: Path) = runTest {
+        val calendars = FakeCalendarDataSource()
+        val (engine, settings) = engineWith(tempDir, FakeContacts(), calendars)
+        engine.sync()
+        val birthdayCal = settings.specialDatesCalendars.first().getValue(SpecialDateType.Birthday)
+
+        engine.applyReminders(SpecialDateType.Birthday, CalendarReminderOverride.None)
+
+        assertThat(settings.perCalendarAllDayReminderOverride.first()[birthdayCal]).isEmpty()
+        assertThat(calendars.appliedManagedReminders.last().third).isEmpty()
+    }
+
+    // --- pure diff ---
+
+    private fun desired(uid: String, title: String, dt: Long, rrule: String? = "FREQ=YEARLY") =
+        ManagedEventDesired(uid, title, dt, rrule)
+
+    private fun row(id: Long, uid: String, title: String, dt: Long, rrule: String? = "FREQ=YEARLY") =
+        ManagedEventRow(id, uid, title, dt, rrule)
+
+    @Test
+    fun `diff inserts new, deletes gone, and leaves unchanged alone`() {
+        val diff = diffManagedEvents(
+            desired = listOf(desired("keep", "Jane", 100), desired("new", "Ada", 200)),
+            existing = listOf(row(1, "keep", "Jane", 100), row(2, "gone", "Old", 300)),
+        )
+        assertThat(diff.insertUids).containsExactly("new")
+        assertThat(diff.deleteEventIds).containsExactly(2L)
+        assertThat(diff.updates).isEmpty()
+    }
+
+    @Test
+    fun `diff emits only the changed managed columns`() {
+        val diff = diffManagedEvents(
+            desired = listOf(desired("a", "Janet", 150)),
+            existing = listOf(row(9, "a", "Jane", 100)),
+        )
+        val update = diff.updates.single()
+        assertThat(update.eventId).isEqualTo(9L)
+        assertThat(update.columns.keys)
+            .containsExactly(CalendarContract.Events.TITLE, CalendarContract.Events.DTSTART)
+    }
+}

app/src/test/java/de/jeanlucmakiola/calendula/data/prefs/SettingsPrefsTest.kt

@@ -6,6 +6,7 @@ import androidx.datastore.preferences.core.Preferences
 import com.google.common.truth.Truth.assertThat
 import de.jeanlucmakiola.calendula.domain.EventFormField
 import de.jeanlucmakiola.calendula.domain.FontRole
+import de.jeanlucmakiola.calendula.domain.contacts.SpecialDateType
 import de.jeanlucmakiola.calendula.ui.agenda.AgendaRange
 import de.jeanlucmakiola.calendula.ui.common.CalendarView
 import de.jeanlucmakiola.calendula.ui.common.IMPLEMENTED_VIEWS
@@ -465,4 +466,59 @@ class SettingsPrefsTest {
         assertThat(WeekStartPref.Auto.resolveFirstDay(Locale.GERMANY)).isEqualTo(DayOfWeek.MONDAY)
         assertThat(WeekStartPref.Auto.resolveFirstDay(Locale.US)).isEqualTo(DayOfWeek.SUNDAY)
     }
+
+    @Test
+    fun `special dates feature is off with all types on by default`(@TempDir tempDir: Path) = runTest {
+        val prefs = SettingsPrefs(newDataStore(tempDir))
+        assertThat(prefs.specialDatesEnabled.first()).isFalse()
+        assertThat(prefs.specialDatesTypes.first()).isEqualTo(SpecialDateType.entries.toSet())
+        assertThat(prefs.specialDatesCalendars.first()).isEmpty()
+        assertThat(prefs.managedCalendarIds.first()).isEmpty()
+        assertThat(prefs.specialDatesShowYear.first()).isTrue()
+    }
+
+    @Test
+    fun `special date type toggles round-trip`(@TempDir tempDir: Path) = runTest {
+        val prefs = SettingsPrefs(newDataStore(tempDir))
+        prefs.setSpecialDateTypeEnabled(SpecialDateType.Anniversary, false)
+        assertThat(prefs.specialDatesTypes.first())
+            .isEqualTo(setOf(SpecialDateType.Birthday, SpecialDateType.Custom))
+    }
+
+    @Test
+    fun `managed calendar ids round-trip and drive managedCalendarIds`(@TempDir tempDir: Path) = runTest {
+        val prefs = SettingsPrefs(newDataStore(tempDir))
+        prefs.setSpecialDatesCalendarId(SpecialDateType.Birthday, 7L)
+        prefs.setSpecialDatesCalendarId(SpecialDateType.Anniversary, 9L)
+        assertThat(prefs.specialDatesCalendars.first())
+            .isEqualTo(mapOf(SpecialDateType.Birthday to 7L, SpecialDateType.Anniversary to 9L))
+        assertThat(prefs.managedCalendarIds.first()).isEqualTo(setOf(7L, 9L))
+
+        prefs.setSpecialDatesCalendarId(SpecialDateType.Birthday, null)
+        assertThat(prefs.specialDatesCalendars.first())
+            .isEqualTo(mapOf(SpecialDateType.Anniversary to 9L))
+    }
+
+    @Test
+    fun `title template round-trips per type`(@TempDir tempDir: Path) = runTest {
+        val prefs = SettingsPrefs(newDataStore(tempDir))
+        assertThat(prefs.specialDatesTitleTemplates.first()[SpecialDateType.Birthday]).isEmpty()
+        prefs.setSpecialDatesTitleTemplate(SpecialDateType.Birthday, "{name}'s birthday")
+        assertThat(prefs.specialDatesTitleTemplates.first()[SpecialDateType.Birthday])
+            .isEqualTo("{name}'s birthday")
+    }
+
+    @Test
+    fun `sync status records run and stalled reason`(@TempDir tempDir: Path) = runTest {
+        val prefs = SettingsPrefs(newDataStore(tempDir))
+        assertThat(prefs.specialDatesStatus.first())
+            .isEqualTo(SpecialDatesStatus(lastRun = 0L, stalled = null))
+
+        prefs.recordSpecialDatesRun(1000L, SpecialDatesStalledReason.PermissionRevoked)
+        assertThat(prefs.specialDatesStatus.first())
+            .isEqualTo(SpecialDatesStatus(1000L, SpecialDatesStalledReason.PermissionRevoked))
+
+        prefs.recordSpecialDatesRun(2000L, null)
+        assertThat(prefs.specialDatesStatus.first()).isEqualTo(SpecialDatesStatus(2000L, null))
+    }
 }

app/src/test/java/de/jeanlucmakiola/calendula/domain/InsertEventFormTest.kt

@@ -0,0 +1,115 @@
+package de.jeanlucmakiola.calendula.domain
+
+import com.google.common.truth.Truth.assertThat
+import kotlinx.datetime.LocalDate
+import kotlinx.datetime.LocalDateTime
+import kotlinx.datetime.LocalTime
+import kotlinx.datetime.TimeZone
+import kotlinx.datetime.atStartOfDayIn
+import kotlinx.datetime.toInstant
+import org.junit.jupiter.api.Test
+import kotlin.time.Instant
+
+class InsertEventFormTest {
+
+    private val zone = TimeZone.UTC
+
+    // A fixed "now" at 2026-01-15T10:20:00Z; the next full hour is 11:00.
+    private val now = LocalDateTime(2026, 1, 15, 10, 20).toInstant(zone)
+
+    private fun build(
+        beginMillis: Long? = null,
+        endMillis: Long? = null,
+        isAllDay: Boolean = false,
+        title: String? = null,
+        description: String? = null,
+        location: String? = null,
+        rrule: String? = null,
+    ): EventForm = buildInsertEventForm(
+        beginMillis = beginMillis,
+        endMillis = endMillis,
+        isAllDay = isAllDay,
+        title = title,
+        description = description,
+        location = location,
+        rrule = rrule,
+        zone = zone,
+        now = now,
+    )
+
+    private fun millis(dateTime: LocalDateTime): Long = dateTime.toInstant(zone).toEpochMilliseconds()
+
+    @Test
+    fun `timed event maps all provided fields`() {
+        val start = LocalDateTime(2026, 3, 1, 14, 30)
+        val end = LocalDateTime(2026, 3, 1, 15, 45)
+        val form = build(
+            beginMillis = millis(start),
+            endMillis = millis(end),
+            title = "Standup",
+            description = "Daily",
+            location = "Room 1",
+            rrule = "FREQ=DAILY",
+        )
+        assertThat(form.calendarId).isNull() // resolves to last-used / first-writable
+        assertThat(form.isAllDay).isFalse()
+        assertThat(form.start).isEqualTo(start)
+        assertThat(form.end).isEqualTo(end)
+        assertThat(form.title).isEqualTo("Standup")
+        assertThat(form.description).isEqualTo("Daily")
+        assertThat(form.location).isEqualTo("Room 1")
+        assertThat(form.rrule).isEqualTo("FREQ=DAILY")
+    }
+
+    @Test
+    fun `missing times default to the next full hour and a one-hour duration`() {
+        val form = build(title = "Quick note")
+        assertThat(form.start).isEqualTo(LocalDateTime(2026, 1, 15, 11, 0))
+        assertThat(form.end).isEqualTo(LocalDateTime(2026, 1, 15, 12, 0))
+        assertThat(form.title).isEqualTo("Quick note")
+    }
+
+    @Test
+    fun `timed event with only a start gets a one-hour end`() {
+        val start = LocalDateTime(2026, 5, 2, 9, 0)
+        val form = build(beginMillis = millis(start))
+        assertThat(form.start).isEqualTo(start)
+        assertThat(form.end).isEqualTo(LocalDateTime(2026, 5, 2, 10, 0))
+    }
+
+    @Test
+    fun `an end before the start is ignored and falls back to plus one hour`() {
+        val start = LocalDateTime(2026, 5, 2, 9, 0)
+        val badEnd = LocalDateTime(2026, 5, 2, 8, 0)
+        val form = build(beginMillis = millis(start), endMillis = millis(badEnd))
+        assertThat(form.end).isEqualTo(LocalDateTime(2026, 5, 2, 10, 0))
+    }
+
+    @Test
+    fun `all-day event uses UTC dates and decrements the exclusive end`() {
+        val startMillis = LocalDate(2026, 1, 1).atStartOfDayIn(TimeZone.UTC).toEpochMilliseconds()
+        val endExclusive = LocalDate(2026, 1, 3).atStartOfDayIn(TimeZone.UTC).toEpochMilliseconds()
+        val form = build(beginMillis = startMillis, endMillis = endExclusive, isAllDay = true, title = "Trip")
+        assertThat(form.isAllDay).isTrue()
+        assertThat(form.start.date).isEqualTo(LocalDate(2026, 1, 1))
+        assertThat(form.end.date).isEqualTo(LocalDate(2026, 1, 2))
+        // Placeholder wall-clock times survive a switch back to a timed event.
+        assertThat(form.start.time).isEqualTo(LocalTime(9, 0))
+        assertThat(form.end.time).isEqualTo(LocalTime(10, 0))
+    }
+
+    @Test
+    fun `all-day event without an end is a single day`() {
+        val startMillis = LocalDate(2026, 6, 10).atStartOfDayIn(TimeZone.UTC).toEpochMilliseconds()
+        val form = build(beginMillis = startMillis, isAllDay = true)
+        assertThat(form.start.date).isEqualTo(LocalDate(2026, 6, 10))
+        assertThat(form.end.date).isEqualTo(LocalDate(2026, 6, 10))
+    }
+
+    @Test
+    fun `a leading RRULE prefix is stripped and a blank rule becomes null`() {
+        assertThat(build(rrule = "RRULE:FREQ=WEEKLY").rrule).isEqualTo("FREQ=WEEKLY")
+        assertThat(build(rrule = "   ").rrule).isNull()
+        assertThat(build(rrule = null).rrule).isNull()
+    }
+}

app/src/test/java/de/jeanlucmakiola/calendula/domain/contacts/ContactSpecialDateTest.kt

@@ -0,0 +1,64 @@
+package de.jeanlucmakiola.calendula.domain.contacts
+
+import com.google.common.truth.Truth.assertThat
+import org.junit.jupiter.api.Test
+
+class ContactSpecialDateTest {
+
+    @Test
+    fun `parses a full yyyy-MM-dd date with year`() {
+        val parts = parseContactEventDate("1990-05-14")
+        assertThat(parts).isEqualTo(ContactDateParts(year = 1990, month = 5, day = 14))
+    }
+
+    @Test
+    fun `parses a year-less --MM-dd date`() {
+        val parts = parseContactEventDate("--05-14")
+        assertThat(parts).isEqualTo(ContactDateParts(year = null, month = 5, day = 14))
+    }
+
+    @Test
+    fun `parses a compact yyyyMMdd date`() {
+        val parts = parseContactEventDate("19900514")
+        assertThat(parts).isEqualTo(ContactDateParts(year = 1990, month = 5, day = 14))
+    }
+
+    @Test
+    fun `parses a year-less MM-dd date without the double-dash prefix`() {
+        val parts = parseContactEventDate("12-25")
+        assertThat(parts).isEqualTo(ContactDateParts(year = null, month = 12, day = 25))
+    }
+
+    @Test
+    fun `keeps a year-less Feb 29 by validating against a leap anchor`() {
+        val parts = parseContactEventDate("--02-29")
+        assertThat(parts).isEqualTo(ContactDateParts(year = null, month = 2, day = 29))
+    }
+
+    @Test
+    fun `keeps Feb 29 in a real leap year`() {
+        assertThat(parseContactEventDate("2000-02-29"))
+            .isEqualTo(ContactDateParts(year = 2000, month = 2, day = 29))
+    }
+
+    @Test
+    fun `rejects Feb 29 in a non-leap year`() {
+        assertThat(parseContactEventDate("1999-02-29")).isNull()
+    }
+
+    @Test
+    fun `rejects an impossible month or day`() {
+        assertThat(parseContactEventDate("2020-13-01")).isNull()
+        assertThat(parseContactEventDate("2020-06-31")).isNull()
+        assertThat(parseContactEventDate("--00-10")).isNull()
+    }
+
+    @Test
+    fun `rejects blank, null and garbage input`() {
+        assertThat(parseContactEventDate(null)).isNull()
+        assertThat(parseContactEventDate("")).isNull()
+        assertThat(parseContactEventDate("   ")).isNull()
+        assertThat(parseContactEventDate("not-a-date")).isNull()
+        assertThat(parseContactEventDate("2020")).isNull()
+    }
+}

app/src/test/java/de/jeanlucmakiola/calendula/domain/contacts/SpecialDateFormattingTest.kt

@@ -0,0 +1,78 @@
+package de.jeanlucmakiola.calendula.domain.contacts
+
+import com.google.common.truth.Truth.assertThat
+import kotlinx.datetime.LocalDate
+import org.junit.jupiter.api.Test
+
+class SpecialDateFormattingTest {
+
+    private fun birthday(month: Int, day: Int, year: Int?) = ContactSpecialDate(
+        lookupKey = "k",
+        displayName = "Jane",
+        type = SpecialDateType.Birthday,
+        month = month,
+        day = day,
+        year = year,
+    )
+
+    @Test
+    fun `uid is deterministic and namespaced by type`() {
+        assertThat(managedEventUid(SpecialDateType.Birthday, "abc"))
+            .isEqualTo("contact-birthday:abc@calendula")
+        assertThat(managedEventUid(SpecialDateType.Anniversary, "abc"))
+            .isEqualTo("contact-anniversary:abc@calendula")
+    }
+
+    private fun custom(label: String?, month: Int, day: Int) = ContactSpecialDate(
+        lookupKey = "k",
+        displayName = "Jane",
+        type = SpecialDateType.Custom,
+        month = month,
+        day = day,
+        year = null,
+        label = label,
+    )
+
+    @Test
+    fun `birthday and anniversary uids ignore the discriminator`() {
+        assertThat(birthday(5, 14, 1990).managedUid()).isEqualTo("contact-birthday:k@calendula")
+    }
+
+    @Test
+    fun `two custom dates on one contact get distinct uids by label`() {
+        assertThat(custom("Wedding", 6, 10).managedUid())
+            .isEqualTo("contact-custom:k:wedding@calendula")
+        assertThat(custom("Graduation", 9, 1).managedUid())
+            .isNotEqualTo(custom("Wedding", 6, 10).managedUid())
+    }
+
+    @Test
+    fun `label-less custom dates fall back to month-day so distinct dates survive`() {
+        assertThat(custom(null, 6, 10).managedUid())
+            .isEqualTo("contact-custom:k:06-10@calendula")
+        assertThat(custom(null, 9, 1).managedUid())
+            .isNotEqualTo(custom(null, 6, 10).managedUid())
+    }
+
+    @Test
+    fun `anchor date uses the known year`() {
+        assertThat(birthday(5, 14, 1990).anchorDate()).isEqualTo(LocalDate(1990, 5, 14))
+    }
+
+    @Test
+    fun `anchor date falls back to a leap year when year-less`() {
+        assertThat(birthday(2, 29, null).anchorDate()).isEqualTo(LocalDate(YEARLESS_ANCHOR_YEAR, 2, 29))
+    }
+
+    @Test
+    fun `title substitutes name and year`() {
+        assertThat(renderSpecialDateTitle("{name}'s birthday ({year})", "Jane", 1990))
+            .isEqualTo("Jane's birthday (1990)")
+    }
+
+    @Test
+    fun `title drops an empty year parenthesis and tidies spacing`() {
+        assertThat(renderSpecialDateTitle("{name}'s birthday ({year})", "Jane", null))
+            .isEqualTo("Jane's birthday")
+    }
+}

docs/design/contact-special-dates.md

@@ -0,0 +1,248 @@
+# Design: Contact special-dates calendars (+ per-calendar multiple reminders)
+
+Status: **implemented** on `feat/contact-special-dates` (#14 prerequisite merged in)
+Date: 2026-06-30 (implemented 2026-07-01)
+Tracking: Codeberg #15 (feature), Codeberg #14 (prerequisite)
+
+Implementation notes / deviations from this design:
+
+- **Event identity key is a deterministic `Events.UID_2445`**
+  (`contact-<type>:<lookupKey>@calendula`), not `SYNC_DATA1`. On a LOCAL calendar
+  the provider drops `_sync` columns unless written through a sync-adapter URI;
+  `UID_2445` is written/read through the normal event URIs the app already uses
+  (and doubles as a stable iCal UID). The managed **calendar** still carries a
+  `CAL_SYNC2` marker for re-adoption (calendar-row writes already use the
+  sync-adapter URI).
+- **Year, not age.** A `FREQ=YEARLY` row has one static title, so a per-occurrence
+  age is impossible without per-year exception rows (rejected as too heavy). The
+  template instead offers `{year}` — the birth year (or an anniversary's start
+  year) — which is static and correct on every occurrence. A "Show year" toggle
+  gates it; it's in the default templates ("{name}'s birthday ({year})").
+- New managed calendars seed a per-calendar all-day reminder default of
+  on-the-day + one week before, so birthdays get lead time out of the box.
+- Title template is user-editable per type from day one (`{name}`, `{year}`).
+
+This document captures the full design for surfacing contact birthdays —
+and, by extension, anniversaries and custom dates — as auto-updating local
+calendars in Calendula. It also specifies #14 (per-calendar *multiple*
+default reminders), which is a hard prerequisite and ships first.
+
+The two pieces are deliberately split across **two branches / two
+shipments**:
+
+- `feat/per-calendar-multi-reminders` — #14, ships first.
+- `feat/contact-special-dates` — #15, builds on #14.
+
+They *may* release together depending on timing, but #14 is independently
+useful and is the foundation the special-dates calendars lean on.
+
+---
+
+## Why this is worth doing carefully
+
+Calendula's identity is privacy: **no INTERNET permission**, and historically
+**no `READ_CONTACTS`** — guest-picking uses a one-shot `ACTION_PICK` so the app
+never holds the contacts permission (`EventEditScreen.kt:446-460`).
+
+This feature **declares `READ_CONTACTS`** for the first time. That is a
+deliberate, owner-approved shift, mitigated by:
+
+- The permission is **opt-in and feature-gated** — requested only when the user
+  enables the feature, never at startup.
+- Everything stays **offline**. Contacts are read locally and mirrored into a
+  local calendar; nothing leaves the device.
+- The mirror is **one-way** (contacts → calendar). Calendula never writes to
+  Contacts.
+
+Store listing / About copy will need to explain the optional permission.
+
+---
+
+## Prerequisite — #14: per-calendar *multiple* default reminders
+
+### Today
+
+- Events already support **multiple reminders** — `EventForm.reminders:
+  List<Int>` (`EventForm.kt:24`), each written as a separate
+  `CalendarContract.Reminders` row (`CalendarDataSource.kt:620-630`), each
+  firing independently. The runtime/notification path is done.
+- The **defaults** layer is single-valued, though:
+  - Global: `defaultReminderMinutes` / `defaultAllDayReminderMinutes` — single
+    `Int` (`SettingsPrefs.kt:287,302`).
+  - Per-calendar override: `perCalendarReminderOverride: Map<Long, Int?>` and
+    the all-day variant (`SettingsPrefs.kt:350-381`), resolved by
+    `resolveDefaultReminder()` (`SettingsPrefs.kt:509-524`).
+  - UI: expandable per-calendar override section
+    (`SettingsScreen.kt:879-953`); `ReminderDefaultPicker` (`:956+`).
+
+### The change
+
+Widen the **defaults**, not the runtime, from one reminder to a list:
+
+1. Resolution model `Int` → `List<Int>` in global defaults + per-calendar
+   override + `resolveDefaultReminder()`. The DataStore string format already
+   parses `id=value;id=value` (`SettingsPrefs.kt:576-577`); `value` becomes a
+   comma-separated list. Keep the `Inherit / None / Minutes` override states
+   (`CalendarReminderOverride`, `SettingsPrefs.kt:493-500`) — `Minutes` carries
+   a list.
+2. `ReminderDefaultPicker` → multi-select. Mirror the event-form multi-reminder
+   UI rather than inventing new interaction.
+3. New events seed `EventForm.reminders` from the **resolved list** instead of
+   a single value.
+
+No new permissions, no provider changes, no scheduling changes. Type widening
+plus one picker upgrade.
+
+### Why it gates #15
+
+Each special-dates calendar is a normal local calendar, so it inherits the
+**per-calendar reminder default** for free. A birthdays calendar is useless
+without lead time (the reporter literally asked for "a week before *and* on the
+day") — that requires *multiple* defaults, i.e. #14.
+
+---
+
+## #15: Contact special-dates calendars
+
+### Core model: one-way mirror, one local calendar per type
+
+Contacts → **separate local calendars per type**:
+
+- "Birthdays"
+- "Anniversaries"
+- "Custom dates" (everything else / `TYPE_OTHER` / `TYPE_CUSTOM`)
+
+Separate-per-type is the key architectural decision: each is a normal local
+calendar (`createLocalCalendar()`, `CalendarDataSource.kt:238-260`), so the
+**existing per-calendar infra applies for free**:
+
+- **Color** → existing per-calendar color.
+- **Show/hide** → existing calendar visibility.
+- **Default reminders** → per-calendar override from #14.
+
+This shrinks the new surface dramatically: anniversaries and custom dates are
+near copy-paste of birthdays (same engine, different `ContactsContract` data
+kind, one extra local calendar each), and the settings sub-page does **not**
+need to reinvent color/visibility/reminders.
+
+### Events: field-level managed, not read-only
+
+Calendula manages a few fields; the user owns the rest.
+
+- **Managed** (overwritten on every sync, disabled in the editor for these
+  events): title, start date, recurrence (`FREQ=YEARLY`), existence.
+- **User-owned** (seeded once on insert, never touched again by sync):
+  location, reminders, notes, busy/free.
+
+The rule that makes this safe: sync performs a **targeted column update**
+(managed columns only), **never delete-and-reinsert**. Reminders live in
+separate rows, so once seeded they are simply never re-touched. A user can move
+a birthday reminder to "2 weeks before" or add a location and neither is
+clobbered.
+
+In the editor, when an event belongs to a managed calendar: disable the
+title/date/recurrence fields; allow the rest.
+
+### Reconciliation identity
+
+Stamp each event with the contact's `LOOKUP_KEY` in `Events.SYNC_DATA1` (ours,
+since it's a local calendar). Sync becomes an idempotent diff keyed on it:
+
+- contact added → insert
+- birthday/date changed → targeted update of managed columns
+- contact or date removed → delete the event
+
+Getting this wrong = duplicate birthdays on every sync, so the identity key is
+non-negotiable.
+
+### Data source
+
+`ContactsContract.Data` rows of `Event.CONTENT_ITEM_TYPE`, split by
+`Event.TYPE`:
+
+- `TYPE_BIRTHDAY` → Birthdays calendar
+- `TYPE_ANNIVERSARY` → Anniversaries calendar
+- `TYPE_OTHER` / `TYPE_CUSTOM` (+ label) → Custom dates calendar
+
+### Dates: year-less + age
+
+Many contacts store `--MM-DD` (no year). Handle both:
+
+- **Year present:** anchor `DTSTART` at that year; `FREQ=YEARLY`. We can show
+  age ("Jane turns 30") when the show-age option is on.
+- **Year absent:** `FREQ=YEARLY` from an arbitrary anchor year; no age shown.
+
+Recurrence support is already there: `FREQ=YEARLY` + `UNTIL`/`COUNT`/`INTERVAL`
+(`Recurrence.kt:32-174`).
+
+### Auto-update cadence
+
+Birthdays change rarely, so nothing live/expensive:
+
+- Sync **on enable**, **on app foreground**, and a **daily WorkManager** job
+  (catches new/edited/deleted contacts even if the app isn't opened).
+- **No `ContentObserver`** — needs the process alive and buys almost nothing
+  for once-a-year events.
+
+### Permission + lifecycle
+
+- **Enable:** request `READ_CONTACTS` (feature-gated, contextual — mirror the
+  contextual `WRITE_CALENDAR` pattern at `EventEditScreen.kt:216-231`). On
+  grant, create the enabled calendars and run the first sync.
+- **Disable:** delete the managed calendars + their events (with a confirm).
+- **Permission revoked in system settings:** detect on next sync; surface that
+  the feature is stalled rather than failing silently.
+
+### Configurable settings sub-page
+
+Enabling the feature reveals a **dedicated sub-page** (not inline rows). Because
+color/visibility/reminders already live in normal calendar settings, the
+sub-page only carries the genuinely new knobs:
+
+- Master enable toggle.
+- Per-type toggles: Birthdays / Anniversaries / Custom dates.
+- Title/display template, e.g. `"{name}'s birthday"` (new translatable string).
+- Show-age toggle (only meaningful when the year is known).
+- (Possibly) sync-cadence / "sync now".
+- Pointer to the normal calendar settings for color, visibility, reminders.
+
+The owner wants this broadly configurable — keep the sub-page the home for
+display/behaviour options, and lean on existing per-calendar settings for the
+rest.
+
+---
+
+## Open questions / deferred
+
+- Title template: free-form vs a small set of presets. Start with one good
+  localized default; revisit configurability.
+- Whether "Custom dates" is one bucket or split further by label. Start: one
+  bucket.
+- Contact scope: all contacts vs per-account/group filtering. Start: all;
+  filtering is a later refinement.
+
+## Task outline
+
+### #14 — per-calendar multiple default reminders (`feat/per-calendar-multi-reminders`)
+- [x] Widen global + per-calendar reminder defaults `Int` → `List<Int>`
+      (`SettingsPrefs.kt`), keep `Inherit/None/Minutes(list)`.
+- [x] `resolveDefaultReminder()` returns a list.
+- [x] `ReminderDefaultPicker` → multi-select (mirror event-form UI).
+- [x] Seed new events' `EventForm.reminders` from the resolved list.
+- [x] Migration / parse compatibility for existing single-value stored prefs.
+- [x] Tests: resolution, parse round-trip, all-day variant.
+
+### #15 — contact special-dates (`feat/contact-special-dates`)
+- [x] Declare `READ_CONTACTS`; feature-gated contextual request on enable.
+- [x] Per-type local calendars (create on enable, delete on disable+confirm).
+- [x] Contacts reader: `Event` rows by `TYPE`, year-less handling.
+- [x] Sync engine: idempotent diff keyed on the deterministic `UID_2445`
+      (see notes; not `SYNC_DATA1`); targeted managed-column updates; seed
+      user-owned fields on insert only.
+- [x] `FREQ=YEARLY` event generation + `{year}` in titles (static, always correct).
+- [x] Auto-update: on enable, on foreground, daily WorkManager.
+- [x] Editor: disable managed fields for managed-calendar events.
+- [x] Revoked-permission detection + stalled-state surface.
+- [x] Settings sub-page: enable, per-type toggles, title template, show-age.
+- [x] Translatable strings (titles, sub-page).
+- [x] About / store copy for the optional `READ_CONTACTS` permission.

docs/superpowers/plans/2026-06-11-03-write-support.md

@@ -1,204 +0,0 @@
-# Calendula - Plan 03: Write Support (Milestone 2 / v2.0)
-
-> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
-
-**Goal:** Calendula kann Events anlegen, bearbeiten und löschen — direkt über
-`CalendarContract`-Writes, ohne eigene DB. Der V1-Spec dient als Leitplanke,
-nicht als Gesetz: Ausgeliefert wird in vier Slices (v1.1 → v2.0), jeder Slice
-ist für sich releasebar und lässt `./gradlew lint test assembleDebug` grün.
-
-**Architecture:** Writes laufen durch dieselbe Schichtung wie Reads:
-`ui/` → `CalendarRepository` (Interface) → `CalendarDataSource` →
-`ContentResolver.insert/update/delete`. Kein neuer Layer, keine Transaktions-
-Abstraktion — der Provider notified nach jedem Write selbst, der bestehende
-`ContentObserver`-Tick aktualisiert alle Views automatisch (F3 gilt unverändert).
-Domain bleibt pure Kotlin.
-
-**Leitentscheidungen (Abweichungen / Präzisierungen ggü. Spec §2 "V2"):**
-
-1. **Permission-Strategie:** `WRITE_CALENDAR` kommt ins Manifest. Das Onboarding
-   fragt READ+WRITE zusammen an (eine System-Dialog-Gruppe), zwingend bleibt
-   nur READ — wer Write ablehnt, nutzt die App weiter read-only.
-   v1.0-Upgrader (haben nur READ) bekommen den WRITE-Request kontextuell beim
-   ersten Schreib-Versuch. Onboarding-Footnote verliert die "Nur Lesezugriff"-
-   Behauptung (wäre mit Manifest-Eintrag gelogen).
-2. **Read-only-Kalender respektieren:** `Calendars.CALENDAR_ACCESS_LEVEL` wird
-   mitgelesen (`canModifyContents` = Level ≥ `CAL_ACCESS_CONTRIBUTOR`).
-   Edit/Delete-Actions erscheinen gar nicht erst für WebCal-Subscriptions,
-   Geburtstags- und andere read-only-Kalender.
-3. **Recurring Events:** Löschen bietet "Nur dieser Termin" (Exception-Insert
-   via `Events.CONTENT_EXCEPTION_URI` mit `STATUS_CANCELED` +
-   `ORIGINAL_INSTANCE_TIME`) vs. "Ganze Serie" (Delete der Events-Row).
-   Bearbeiten startet mit "ganze Serie"; Occurrence-Edit (Exception mit neuen
-   Werten) folgt erst, wenn das Serien-Edit stabil ist.
-4. **Kein RRULE-Editor in v1.2:** Create startet ohne Wiederholungs-UI
-   (einmalige Events). Ein einfacher Recurrence-Picker (täglich/wöchentlich/
-   monatlich/jährlich + Ende) kommt mit v1.3/v2.0.
-5. **Conflict UX (Spec V2 "event modified externally during edit"):** kein
-   Locking. Beim Speichern wird gegen die beim Laden gemerkte Row verglichen
-   (Dirty-Check auf den editierten Feldern); bei externem Konflikt Dialog
-   "Überschreiben / Verwerfen". Mehr ist YAGNI.
-
----
-
-## Slices
-
-| Slice | Inhalt | Status |
-|---|---|---|
-| v1.1 | Write-Fundament: `WRITE_CALENDAR`, `canModifyContents`, Delete (Serie + einzelnes Vorkommen) | ausgeliefert (v1.1.0, 2026-06-11) |
-| v1.2 | Create: Event-Formular (Titel, Kalender, ganztägig, Start/Ende, Ort, Beschreibung), FAB, Default-Kalender-Pref | ausgeliefert (v1.2.0, 2026-06-11) |
-| v1.3 | Edit: Formular wiederverwendet, Serien-Edit, Reminder-Edit, einfacher Recurrence-Picker | ausgeliefert (v1.3.0, 2026-06-11) |
-| v2.0 | Konflikt-Dialog, Polish-Pass (Store-Copy, Screenshots), Release | ausgeliefert (v2.0.0, 2026-06-11) |
-
-## v1.1 — Write-Fundament + Delete
-
-**Build/Manifest:**
-- [x] `AndroidManifest.xml`: `WRITE_CALENDAR` ergänzen
-
-**Data layer:**
-- [x] `Projections.kt`: `CALENDAR_ACCESS_LEVEL` in `CalendarProjection`
-- [x] `Models.kt`: `CalendarSource.canModifyContents: Boolean` (Default `false`).
-      Kein neuer `FailureReason` — Delete-Fehler sind ein Snackbar-Fall, kein
-      Full-Screen-Failure
-- [x] `CalendarMapper.kt`: Access-Level → `canModifyContents`
-- [x] `CalendarDataSource`: `deleteEvent(eventId)`, `deleteOccurrence(eventId, beginMillis)`
-      — Impl in `AndroidCalendarDataSource` (`delete` auf Events-URI bzw.
-      Exception-Insert), `WriteFailedException` bei 0 rows / null-Uri
-- [x] `CalendarRepository(+Impl)`: beide Methoden durchreichen, auf `io`
-
-**UI:**
-- [x] `EventDetailUiState.Success.canModify` (Kalender-Lookup im ViewModel)
-- [x] `EventDetailViewModel`: `delete(mode)` mit eigenem One-Shot-State
-      (Idle/Deleting/Deleted/Failed); `SecurityException` → kontextueller
-      WRITE-Request statt Failure-Screen
-- [x] `EventDetailScreen`: Edit/Delete nur wenn `canModify`; Delete →
-      Confirm-Dialog (recurring: "Nur dieser Termin" / "Ganze Serie"),
-      Erfolg → zurück, Fehler → Snackbar
-- [x] Onboarding (`PermissionScreen`): `RequestMultiplePermissions` READ+WRITE,
-      Gate bleibt READ; Copy-Anpassung (Footnote, Rationale-Body) DE+EN
-
-**Tests:**
-- [x] `FakeCalendarDataSource`: Write-Ops aufnehmen
-- [x] `CalendarRepositoryImplTest`: delete-Pfade (Erfolg, Fehler)
-- [x] `CalendarMapperTest`: Access-Level-Mapping
-
-## v1.2 — Create
-
-- [x] `EventForm`-Domain-Modell + Validierung (`problems()`: EndBeforeStart,
-      NoCalendar; leerer Titel und Instant-Events erlaubt)
-- [x] `EventEditScreen` (ein Formular, ab v1.3 auch für Edit), M3-Date/Time-Picker
-- [x] FAB-Stack auf allen drei Hauptansichten (`CalendarFabColumn`: "+" immer,
-      Heute-Pill darüber), vorbelegt mit dem sichtbaren Tag
-- [x] Kalender-Vorauswahl: explizit > zuletzt benutzt
-      (`CalendarPrefs.lastUsedCalendarId` statt Settings-Eintrag) > erster
-      beschreibbarer; Picker bietet nur beschreibbare Kalender an
-- [x] `insertEvent(form): Long` im DataSource; `EventWriteMapper` (JVM-testbar)
-      normalisiert all-day auf UTC-Mitternächte mit exklusivem DTEND
-
-## v1.3 — Edit
-
-**Domain:**
-- [x] `EventForm.rrule` (roher RRULE-Wert, null = einmalig); komplexe Regeln
-      (ordinales BYDAY wie "2TH", BYMONTHDAY etc.) bleiben verbatim erhalten,
-      solange der Picker sie nicht ersetzt
-- [x] `SimpleRecurrence` (FREQ + INTERVAL + UNTIL/COUNT + wöchentliches
-      BYDAY — Review-Feedback: "jede Woche Mo+Fr" muss gehen) mit
-      `parseSimpleRecurrence`/`toRRule` (Recurrence.kt, JVM-getestet)
-- [x] `EventDetail.toEditForm(begin, end, zone)` — Prefill inkl. all-day-
-      Rückrechnung (exklusives DTEND → letzter abgedeckter Tag)
-- [x] Validierung: `RecurrenceEndsBeforeStart` (UNTIL vor erstem Tag hieße
-      null Vorkommen — Event würde unsichtbar)
-
-**Data layer:**
-- [x] `buildEventUpdateValues(original, updated, seriesDtStart, zone)` —
-      Dirty-Check, nur geänderte Spalten; Zeitfelder als Einheit:
-      einmalig → DTSTART/DTEND (RRULE/DURATION genullt), wiederkehrend →
-      Serien-DTSTART verschiebt sich um das User-Delta, DURATION statt DTEND
-- [x] `CalendarDataSource.updateEvent(eventId, original, updated)` — Events-Row-
-      Update + Reminder-Diff nach Minuten (unberührte Rows behalten ihre Methode)
-- [x] `insertEvent` versteht RRULE (RRULE+DURATION statt DTEND — Provider-Invariante)
-- [x] `CalendarRepository(+Impl).updateEvent` durchgereicht, auf `io`
-- [x] `EventDetailMapper`: Titel bleibt roh (kein "(Ohne Titel)"-Fallback mehr —
-      der Detail-Screen ersetzt selbst lokalisiert, das Formular braucht den Rohwert)
-
-**UI:**
-- [x] `EventEditViewModel.openForEdit` (lädt Detail, merkt Original für
-      Dirty-Check; unverändertes Formular speichert als No-Op); Felder mit
-      Werten werden unabhängig vom Settings-Default eingeblendet
-- [x] `EventEditScreen`: `editKey`-Parameter, Kalender im Edit-Modus fixiert,
-      Repeat-Karte + `RecurrencePickerDialog` (Presets per Tap, Custom-Schritt
-      mit Intervall/Einheit + Wochentags-Toggles bei "Wochen" (Wochenstart
-      nach Locale, Start-Wochentag vorausgewählt) + Ende nie/Datum/Anzahl,
-      OptionCard-Stil)
-- [x] Recurrence-Humanizer nach `ui/common/RecurrenceText.kt` (Detail + Formular)
-- [x] `EventDetailScreen`: Edit-Action (nur `canModify`, kontextueller
-      WRITE-Request wie Delete); Save schließt Formular **und** Detail (die
-      getappte Occurrence existiert danach evtl. nicht mehr)
-- [x] **Occurrence-Edit (aus v2.0 vorgezogen, Review-Feedback):** Die
-      Scope-Frage kommt **beim Speichern** (Google-Modell, Review-Feedback):
-      ein dirty wiederkehrender Termin parkt in `SaveUiState.AwaitingScope`,
-      der Dialog bietet "Nur dieser Termin / Dieser und alle folgenden /
-      Ganze Serie"; bei geänderter Wiederholungsregel entfällt "nur dieser"
-      (eine Exception-Row trägt keine eigene Regel). "Nur dieser" schreibt
-      eine Modified-Occurrence-Exception (`CONTENT_EXCEPTION_URI`, alle
-      Formularwerte, leere Optionals als explizite NULLs weil der Provider
-      die Serien-Row klont), Reminder werden gegen die tatsächlichen
-      Provider-Rows abgeglichen. "Dieser und folgende" = Serien-Split:
-      neues Event mit den Formularwerten (insert zuerst — schlägt es fehl,
-      bleibt das Original unberührt), dann Original-RRULE per UNTIL gekappt;
-      ab der ersten Occurrence = normales Serien-Update. Ein mitgenommenes
-      COUNT zählt in der neuen Serie neu (kein Rest-COUNT-Rechnen wie AOSP)
-- [x] **Delete dreistufig (Review-Feedback):** "Nur dieser Termin" /
-      "Dieser und alle folgenden" (RRULE-Truncation via `rruleTruncatedAt`)
-      / "Alle Termine der Serie"; ab der ersten Occurrence = ganze Serie
-      löschen
-- [x] **Split-Duplikat-Bugfix (On-Device-Review):** Nach dem Serien-Split
-      blieb die getappte Occurrence doppelt sichtbar. Root cause (per
-      adb-Probe verifiziert): der Provider regeneriert die Instances eines
-      Events nur aus den **Values des Updates selbst** — ein RRULE-only-
-      Update lässt die alten Instances stehen, und ein Teilset (nur DTSTART)
-      erzeugt kaputte Nulllängen-Instanzen. Truncation-Updates schicken
-      deshalb das komplette Zeit-Set (DTSTART/DURATION/RRULE/ALL_DAY/
-      EVENT_TIMEZONE) zusammen (`truncateSeries`), wie AOSPs
-      EditEventHelper. Zusätzlich (Robustheit, Google-Modell): Cutoff =
-      Ende des Vortags in der Event-Zeitzone (`previousLocalDayEndUtcMillis`)
-      statt Occurrence−1s, und der Recurrence-Picker rendert UNTIL als
-      lokales Tagesende in UTC (`toRRule(zone)`) statt pauschal `T235959Z`
-      (sonst kann bei UTC+x ein Extra-Tag hineinrutschen)
-- [x] `CalendarHost`: Edit-Overlay mit Held-Key-Pattern
-- [x] `EventFormField.Recurrence` (Formular, "Mehr Felder", Settings-Default)
-- [x] Strings DE+EN
-
-**Tests:**
-- [x] `RecurrenceTest` (Parse/Render/Roundtrip, Ablehnung komplexer Regeln)
-- [x] `EventFormTest`: Prefill (timed/all-day), `populatedFields`, UNTIL-Validierung
-- [x] `EventWriteMapperTest`: Duration-Format, Dirty-Check-Pfade (Text-only,
-      Zeit einmalig/wiederkehrend, Recurrence an/aus, Reminder-only)
-- [x] `CalendarRepositoryImplTest` + `FakeCalendarDataSource`: update-Pfade
-- [x] `EventDetailMapperTest`: roher Titel
-
-Bewusst nicht in v1.3 (→ v2.0): Konflikt-Dialog, Kalender-Wechsel beim
-Bearbeiten (Sync-Adapter-Minenfeld, sperren auch alle Stock-Apps).
-
-## v2.0 — Abschluss (Scope-Recut 2026-06-11, nach v1.4)
-
-- ~~Quick-Add-Sheet (Titel + Zeit, Rest Defaults)~~ — **gestrichen**: das
-  Formular öffnet bereits vorbefüllt (sichtbarer Tag, zuletzt benutzter
-  Kalender, optionale Felder versteckt); der Sheet spart nur einen
-  Screen-Übergang und kostet eine zweite Create-Surface. Nur bei
-  Praxis-Feedback wieder aufnehmen
-- ~~Occurrence-Edit (Exception mit geänderten Werten)~~ — schon in v1.3
-  ausgeliefert (vorgezogen)
-- [x] Konflikt-Dialog beim Speichern (Leitentscheidung 5): `EditSnapshot`
-      (Formular + rohe Row-Zeiten) wird beim Laden gemerkt und vor dem
-      Schreiben gegen einen frischen Read verglichen; Abweichung parkt den
-      Save in `AwaitingConflict` (Überschreiben/Verwerfen/Abbrechen,
-      OptionCard-Stil), gelöschtes Event → `Gone`-Dialog. "Überschreiben"
-      schreibt weiterhin nur dirty Felder
-- Kalender-Wechsel beim Bearbeiten → v3-Backlog (copy+delete-Modell)
-- [x] Polish: F-Droid-Description + README auf Write-Support + Reminder
-      aktualisiert (DE+EN)
-- [x] F-Droid-Screenshots (de-DE + en-US, je 6: Woche/Monat/Tag/Detail/
-      Formular/Onboarding) — mit Demo-Kalendern auf dem Gerät aufgenommen
-- [x] Changelog, Release-Tag v2.0.0 (ausgeliefert 2026-06-11 — Milestone 2
-      damit abgeschlossen)

docs/superpowers/plans/2026-06-11-04-reminder-notifications.md

@@ -1,119 +0,0 @@
-# Calendula - Plan 04: Reminder Notifications (v1.4)
-
-> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
-
-**Goal:** Calendula stellt Erinnerungen selbst als Notification zu (Etar-Modell).
-Der Provider plant die Alarme und broadcastet
-`android.intent.action.EVENT_REMINDER` — die sichtbare Notification postet er
-**nicht**, das muss eine Kalender-App tun. Für Nutzer, deren einzige
-Kalender-App Calendula ist, ist das essenziell, kein Nice-to-have.
-`./gradlew lint test assembleDebug` bleibt grün; Release erst nach
-On-Device-Review.
-
-**Architecture:** Eigenes kleines Datenmodul `data/reminders/` neben
-`data/calendar/` — der Receiver braucht weder Repository noch Flows. Schichtung
-wie gehabt: `EventReminderReceiver` (Hilt-EntryPoint) →
-`ReminderAlertStore` (Interface, Android-Impl auf `CalendarAlerts`) →
-`ReminderNotifier` (NotificationManager). Domain bleibt pure Kotlin
-(`ReminderAlert`-Modell, JVM-testbare Textformatierung).
-
-**Recherche-Befunde (AOSP `CalendarAlarmManager` + Etar, 2026-06-11):**
-
-1. Der Provider legt `CalendarAlerts`-Rows **nur für `METHOD_ALERT`-Reminder**
-   an (AOSP-Query: `AND method=1`). Der im Roadmap-Eintrag geforderte
-   METHOD-Filter (E-Mail überspringen) passiert also schon upstream — wir
-   filtern nicht doppelt. Calendula schreibt eigene Reminder ohnehin als
-   `METHOD_ALERT`.
-2. Der Broadcast ist implizit (Action + `content://com.android.calendar/…`-URI,
-   Extra `alarmTime`). Etars Manifest-Receiver ist `exported="true"` mit
-   `<data android:scheme="content"/>` — das übernehmen wir (plus Host,
-   enger gefasst). Den URI-Inhalt werten wir nicht aus; wir queryen selbst
-   "fällig & noch SCHEDULED".
-3. Etar postet aus dem Zustand `SCHEDULED ∪ FIRED` und verwaltet Dismiss über
-   eigene Services. Wir vereinfachen: nur `STATE_SCHEDULED AND alarmTime <= now`
-   posten, danach best-effort auf `FIRED` setzen (braucht `WRITE_CALENDAR`;
-   `SecurityException` wird geschluckt). Weggewischte Notifications kommen so
-   nie wieder, ohne deleteIntent-Maschinerie: FIRED-Rows fassen wir nicht an.
-   Re-Broadcasts ohne Write-Recht ersetzen still (Tag pro Alert +
-   `setOnlyAlertOnce`).
-
-**Leitentscheidungen:**
-
-1. **Kein eigenes Alarm-Scheduling** (kein `SCHEDULE_EXACT_ALARM`, kein
-   `BOOT_COMPLETED`, kein WorkManager): Zustellung hängt am Provider-Broadcast.
-   Etars Zusatz-Maschinerie (eigener AlarmScheduler) kommt erst, wenn sich
-   Zuverlässigkeit auf echten Geräten als Problem zeigt (Roadmap: bewusst
-   verschoben, ebenso Snooze-/Dismiss-Actions und Battery-Exemption).
-2. **Toggle default ON, Onboarding-Schritt danach:** Nach dem Kalender-Grant
-   folgt ein zweiter Onboarding-Screen (gleiche Shell wie der Permission-
-   Screen): erklärt Reminder, warnt vor Duplikaten (zweite Kalender-App mit
-   aktiven Notifications), fragt `POST_NOTIFICATIONS` an (nur API 33+ zeigt
-   einen Dialog; minSdk 29). "Später" schaltet den Toggle aus. Der Schritt
-   erscheint genau einmal (`reminder_onboarding_done`-Pref) — auch für
-   v1.0–v1.3-Upgrader, die das Feature so entdecken.
-3. **Settings-Spiegel:** Abschnitt "Erinnerungen" mit demselben Toggle +
-   Duplikat-Hinweis. Einschalten fordert `POST_NOTIFICATIONS` kontextuell an,
-   wenn sie fehlt.
-4. **Tap öffnet das Event-Detail:** Notification-Intent trägt
-   eventId/begin/end; `MainActivity` wird `singleTop`, reicht den Key als
-   Compose-State an `CalendarHost` durch (gleiches LongArray-Key-Muster wie
-   der Detail-Overlay selbst).
-5. **Ein Kanal, einfache Inhalte:** Kanal "Erinnerungen"
-   (`IMPORTANCE_HIGH`), pro Alert eine Notification (Tag = Alert-Id):
-   Titel = Eventtitel (Fallback "(Ohne Titel)"), Text = Zeitspanne
-   (ganztägig: Datum, UTC gelesen) + Ort. Kein Grouping/Summary, kein
-   Vollbild-Alarm.
-
----
-
-## Tasks
-
-**Manifest / Resourcen:**
-- [x] `POST_NOTIFICATIONS` ins Manifest; Receiver `.reminders.EventReminderReceiver`
-      `exported="true"`, Intent-Filter `EVENT_REMINDER` + `data scheme=content
-      host=com.android.calendar`; `MainActivity` → `launchMode="singleTop"`
-- [x] Monochromes Notification-Icon `drawable/ic_notification.xml`
-- [x] Strings DE+EN: Kanal, Onboarding-Copy, Settings-Abschnitt + Hinweis
-
-**Prefs:**
-- [x] `SettingsPrefs.remindersEnabled` (default **true**) + Setter;
-      `reminderOnboardingDone` (default false) + Setter; `SettingsPrefsTest`
-
-**Data layer (`data/reminders/`):**
-- [x] `ReminderAlert`-Modell (in `data/reminders/`, nicht domain — Alerts
-      erreichen nie einen Screen): alertId, eventId, begin/end als Millis,
-      title, location, isAllDay
-- [x] `ReminderAlertStore` (Interface) + `AndroidReminderAlertStore`:
-      `dueAlerts(nowMillis)` = `CalendarAlerts` mit
-      `STATE_SCHEDULED AND ALARM_TIME <= now`;
-      `markFired(ids, nowMillis)` setzt STATE/RECEIVED_TIME/NOTIFY_TIME,
-      `SecurityException` → Log (Write-Recht optional)
-- [x] `ReminderNotifier`: Kanal lazy anlegen, eine Notification pro Alert
-      (Tag = alertId, `setOnlyAlertOnce`, autoCancel, `when` = begin,
-      Category EVENT), Content-PendingIntent auf `MainActivity` mit
-      eventId/begin/end
-- [x] Zeitspannen-Text als pure Funktion (JVM-testbar) + Test
-
-**Receiver:**
-- [x] `EventReminderReceiver` (`@AndroidEntryPoint`): Action prüfen,
-      `goAsync()`; raus, wenn Pref aus, READ_CALENDAR fehlt oder
-      Notifications systemseitig geblockt; sonst posten → `markFired`
-
-**UI:**
-- [x] Onboarding-Shell aus `PermissionScreen` extrahieren
-      (`OnboardingScaffold` + BenefitRow, intern wiederverwendet)
-- [x] `NotificationOnboardingScreen` + ViewModel: Benefit-Rows (verpasst
-      nichts / Duplikat-Warnung), Primär-Button fordert `POST_NOTIFICATIONS`
-      (API 33+) und lässt den Toggle an, "Später" schaltet ihn aus; beide
-      setzen `reminder_onboarding_done`
-- [x] `RootScreen`: Kalender-Gate → Reminder-Schritt (einmalig) → `CalendarHost`
-- [x] `CalendarHost`: externer Detail-Key (Notification-Tap) wird wie ein
-      Event-Tap konsumiert; `MainActivity` parst Intent (onCreate +
-      onNewIntent) in Compose-State
-- [x] Settings: Abschnitt "Benachrichtigungen" — Toggle (mit kontextuellem
-      Permission-Request beim Einschalten) + Duplikat-Hinweistext
-
-**Abschluss:**
-- [x] `./gradlew lint test assembleDebug` grün
-- [x] CHANGELOG (`[Unreleased]`), ROADMAP-Status; **kein** Tag/Release vor
-      On-Device-Review

docs/superpowers/plans/2026-06-18-05-ics-export.md

@@ -1,150 +0,0 @@
-# Calendula - Plan 05: ICS Export (v2.7, Branch 1 von 2)
-
-> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
-
-**Goal:** Die Schreib-Hälfte des `.ics`-Themas. Calendula serialisiert eigene
-Events nach RFC 5545 — als Einzel-Event (Share-Sheet) und als
-Ganz-Kalender-Backup (SAF-Datei). Damit existiert für gerätelokale Kalender
-(`ACCOUNT_TYPE_LOCAL`) zum ersten Mal ein Backup; ohne Sync ist ein verlorenes
-Gerät sonst Totalverlust. Diese Branch baut **nur Export**; Import
-(Parser, Restore, Open-into-form) folgt in Branch 2 (`feat/ics-import`),
-beide landen zusammen in **einem** Release v2.7.0 — es gibt also keine
-Zwischenversion, die UIDs schreibt, ohne sie je zu lesen.
-`./gradlew lint test assembleDebug` bleibt grün; Release erst nach
-On-Device-Review (gemeinsam mit Branch 2).
-
-**Architecture:** Neue reine-Kotlin-Engine `domain/ics/` — kein
-`CalendarContract`, keine Android-Deps, voll JVM-testbar. Kern ist
-`IcsWriter` (nimmt eine Liste eigener Event-Modelle + Kalender-Metadaten,
-gibt einen `VCALENDAR`-String zurück). Keine ICS-Library: wir bleiben auf
-`kotlinx-datetime` (kein `java.time`-Desugaring) und hand-rollen wie schon
-bei RRULE in `Recurrence.kt`. Das Schreiben in eine SAF-Datei / das
-Share-Intent liegt in einer dünnen Android-Schicht
-(`data/ics/IcsExporter` o. ä.), die Provider-Reads → Domain-Modelle →
-`IcsWriter` → `OutputStream` verdrahtet.
-
-**Recherche-Befunde (Codebase, 2026-06-18):**
-
-1. **Keine ICS-Library, kein `java.time`-Desugaring** — Stack ist
-   `kotlinx-datetime` + `kotlin.time.Instant`. RRULE wird bereits in
-   `domain/Recurrence.kt` von Hand geparst/gerendert (inkl. der sorgfältigen
-   `UNTIL`/DST-Korrektur). `IcsWriter` reiht sich in genau diese Kultur ein und
-   nutzt `SimpleRecurrence.toRRule()` direkt.
-2. **Kein UID-Handling.** `Events.UID_2445` wird heute nirgends gelesen oder
-   geschrieben. Für idempotenten Restore in Branch 2 muss Import auf UID
-   matchen — ohne UID verdoppelt ein erneuter Import alles. Darum schreibt
-   **diese** Branch bereits UID bei jedem Insert (Vorarbeit; ohne Import noch
-   unsichtbar, zahlt sich erst in Branch 2 aus — beide im selben Release).
-3. **Zeitzonen werden gespeichert, aber nie vom Nutzer gewählt.** Lesen/Anzeige:
-   `EVENT_TIMEZONE` landet in `EventDetail.eventTimezone`, das Detail zeigt ein
-   Fremdzonen-Label nur bei Abweichung vom Gerät (`foreignTimeZoneLabel`).
-   Schreiben (`EventWriteMapper.toWriteTimes`): all-day → UTC-Mitternachten,
-   `EVENT_TIMEZONE="UTC"`; getimt → `EVENT_TIMEZONE = zone.id`, und alle Caller
-   übergeben `currentSystemDefault()` (kein Zonen-Feld im Formular). Jedes selbst
-   erstellte Event trägt also die Gerätezone zum Erstellzeitpunkt; eingesynkte
-   Events behalten ihre Originalzone.
-
-**Leitentscheidungen:**
-
-1. **Zeitzonen-Regel beim Schreiben (fallbasiert):**
-   - **All-day** → `DTSTART;VALUE=DATE:YYYYMMDD`, `DTEND` exklusiv
-     (Tag-danach). Keine Zone — trivial korrekt.
-   - **Getimt, nicht wiederkehrend** → UTC-Instant `…T…Z`. Ein Instant ist ein
-     Instant; die Anzeige rechnet beim Import wieder in die Gerätezone. Verlustfrei.
-   - **Getimt, wiederkehrend** → `DTSTART;TZID=<EVENT_TIMEZONE>:<lokale Wandzeit>`.
-     Eine Serie muss an der **Wandzeit** verankert sein, sonst driftet ein
-     „wöchentlich 9 Uhr" über die nächste DST-Grenze um eine Stunde. Die Zone
-     liegt bereits in `EVENT_TIMEZONE` vor; die lokale Wandzeit ist eine
-     `kotlinx-datetime`-Konversion (Instant → LocalDateTime in der Zone).
-   - **`VTIMEZONE`-Blöcke werden bewusst NICHT emittiert.** Beim eigenen
-     Round-Trip löst Branch-2-Import `TZID` gegen die OS-tz-Datenbank auf
-     (`kotlinx-datetime`/`java.time` kennen jede IANA-Id). Technisch nicht
-     RFC-konform; einziger Preis sind strenge Fremd-Parser ohne tz-DB — als
-     bekannte Lücke dokumentiert (Skip-and-report-Territorium des Imports),
-     kein Blocker. Voll-`VTIMEZONE` ist „später, falls nötig".
-2. **UID bei jedem Insert.** `insertEvent` schreibt fortan `Events.UID_2445`
-   (z. B. `<random-uuid>@calendula`). Bestehende Events ohne UID exportieren
-   wir mit einer **deterministischen, stabilen** Fallback-UID, abgeleitet aus
-   `event-id + DTSTART` (`<id>-<dtstart>@calendula`), damit derselbe Bestand
-   über mehrere Backups dieselbe UID behält und Branch-2-Restore nicht
-   verdoppelt. Bestehende Rows werden **nicht** rückwirkend gestempelt
-   (kein Migrations-Sweep über fremde Kalender).
-3. **Manueller Export, kein Background.** Backup via
-   `ACTION_CREATE_DOCUMENT` (SAF, MIME `text/calendar`, Default-Name
-   `calendula-backup-<datum>.ics`); Einzel-Event-Share via `ACTION_SEND` mit
-   einem `FileProvider`-Cache-File (`text/calendar`). Kein WorkManager, kein
-   geplantes/automatisches Backup (passt zum „kein Hintergrunddienst"-Ethos;
-   Auto-Backup bleibt explizit Roadmap-`later`).
-4. **Backup-Layout: eine kombinierte `VCALENDAR`-Datei** über alle
-   gerätelokalen (beschreibbaren) Kalender. Pro Event ein `VEVENT`; die
-   Kalender-Zugehörigkeit reist als `X-WR-CALNAME` / `CATEGORIES` o. ä. mit,
-   damit Branch-2-Restore wieder auffächern oder per Ziel-Picker einsortieren
-   kann. Eine Datei ist einfacher zu teilen/abzulegen als n Dateien.
-   *Offen, vor dem Backup-Task zu fixieren:* exaktes Property fürs
-   Kalender-Mapping (`X-WR-CALNAME` pro `VCALENDAR` erlaubt nur einen Namen;
-   für mehrere Kalender in einer Datei brauchen wir ein Pro-`VEVENT`-Property
-   wie `X-CALENDULA-CALENDAR` oder `CATEGORIES`).
-5. **Feldumfang = was Calendula modelliert.** `IcsWriter` serialisiert genau
-   die gelesenen Felder: `SUMMARY`, `DTSTART`/`DTEND` (Regel #1),
-   `LOCATION`, `DESCRIPTION`, `RRULE` (über `toRRule`), `VALARM` aus den
-   Remindern (DISPLAY, `TRIGGER` = `-PT<min>M`), `STATUS`
-   (CONFIRMED/TENTATIVE/CANCELLED), `TRANSP` (Free→TRANSPARENT/Busy→OPAQUE),
-   `UID`, `DTSTAMP`. Felder ohne sauberes Modell (Attendees, RECURRENCE-ID-
-   Ausnahmen) bleiben **vorerst weg** — Export erzeugt nichts, was Import in
-   Branch 2 nicht auch wieder lesen kann.
-6. **Korrekte RFC-5545-Mechanik:** Zeilen-Folding bei >75 Oktett (CRLF +
-   Space-Fortsetzung), Text-Escaping (`\` `;` `,` `\n`), CRLF-Zeilenenden,
-   `PRODID`/`VERSION:2.0`-Header. Eine reine, einzeln getestete Hilfsschicht
-   (`IcsLine`/`fold`/`escapeText`), nicht ad hoc im Writer verstreut.
-
----
-
-## Tasks
-
-**Domain-Engine (`domain/ics/`, reine Kotlin, JVM-Tests):**
-- [x] `IcsText`: `escapeText`, `foldLine` (75-Oktett, CRLF+Space) + Test
-      (`IcsTextTest`). Wert-Helfer (Instant→`…T…Z`, Wandzeit→`TZID`,
-      LocalDate→`VALUE=DATE`) leben als private Helfer in `IcsWriter`.
-- [x] `IcsEvent`-Eingabemodell (reine Kotlin: summary, start/end als Instant
-      + isAllDay + zoneId, recurrenceRule?, location, description,
-      reminderMinutes, status, availability, uid, calendarName) — entkoppelt
-      vom Provider-Modell
-- [x] `IcsWriter.writeCalendar(events, dtStamp)` → String: Header, pro Event
-      `VEVENT` nach Entscheidung #5, Zeitzonen-Regel #1, `VALARM`; JVM-Test
-      `IcsWriterTest` (all-day, getimt, wiederkehrend+TZID, unbekannte Zone,
-      Reminder, Escaping)
-- [x] UID-Ableitung `deriveIcsUid` (`uid ?: "<eventId>-<dtstartMillis>@calendula"`)
-      + Stabilitätstest
-
-**Provider → Domain (`data/calendar/IcsExportMapper.kt`):**
-- [x] Mapper Provider-Row → `IcsEvent` (`ColumnReader.toIcsEvent`) inkl.
-      DURATION→DTEND-Rekonstruktion (`parseRfc2445DurationMillis`),
-      `EventExportProjection`; Datasource-Methode `exportableEvents()` +
-      Repository `exportEvents()`; Test `IcsExportMapperTest`
-- [x] `insertEvent` schreibt `Events.UID_2445` (`UUID@calendula`) bei jedem
-      Create
-
-**Android-Export-Schicht:**
-- [x] `data/ics/IcsExporter`: `writeDocument(uri)` (SAF) + `stageShareFile`
-      (FileProvider-Cache) als UTF-8
-- [x] Einzel-Event-Share: Share-Action im Event-Detail → `IcsWriter` für ein
-      Event (one-off) → Cache-File über `FileProvider` → `ACTION_SEND`
-- [x] Ganz-Kalender-Backup: „Export as .ics file" in Settings → Calendars →
-      `ACTION_CREATE_DOCUMENT` → in den URI streamen; Ergebnis-Snackbar
-      (Plural „Exported N events")
-- [x] `FileProvider` + `file_paths.xml` im Manifest (Cache-Dir für Shares)
-- [x] Strings DE+EN: Share-Label/Chooser/Fehler, Backup-Sektion/Aktion/
-      Fehler + Plural, dateierter Default-Name
-
-**Abschluss:**
-- [ ] `./gradlew lint test assembleDebug` grün ← **nächster Schritt (Test)**
-- [x] CHANGELOG (`[Unreleased]`) ergänzt
-- [ ] On-Device-Review; **kein** Tag/Release vor Review und vor Merge von
-      Branch 2 (`feat/ics-import`)
-
-**Offene Detail-Calls (vor Review klären, nicht-blockierend):**
-- Kalender→Event-Mapping nutzt das per-`VEVENT`-Property `X-CALENDULA-CALENDAR`
-  (statt `X-WR-CALNAME`), damit eine kombinierte Datei mehrere Kalender trägt.
-- Backup = **eine** kombinierte `VCALENDAR`-Datei über alle lokalen Kalender.
-- EXDATE / `RECURRENCE-ID`-Ausnahmen werden beim Export ausgelassen
-  (`ORIGINAL_ID IS NULL`) — dokumentierter v1-Grenzfall, Import lässt sie auch aus.

docs/superpowers/plans/2026-06-18-06-ics-import.md

@@ -1,122 +0,0 @@
-# Calendula - Plan 06: ICS Import (v2.7, Branch 2 von 2)
-
-> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
-
-**Goal:** Die Lese-Hälfte des `.ics`-Themas, aufgesetzt auf den Writer aus
-Branch 1 (`feat/ics-export`, gemerged in `release/v2.7.0`). Calendula parst
-RFC-5545-Dateien und führt sie über zwei Wege ein: eine einzelne `VEVENT` öffnet
-das vorausgefüllte Erstellen-Formular (Review vor dem Speichern), eine Datei mit
-vielen Events geht in einen Bulk-Import mit Ziel-Kalender-Auswahl und
-Ergebnis-Report. Damit schließt sich der Backup→Restore-Kreis für lokale
-Kalender. Beide Branches landen in **einem** Release v2.7.0.
-`./gradlew lint test assembleDebug` bleibt grün; Release erst nach
-On-Device-Review.
-
-**Architecture:** `IcsParser` lebt rein in `domain/ics/` neben `IcsWriter` —
-kein Android, JVM-testbar, symmetrisch zum Writer. Ausgabe ist ein
-`IcsParseResult` (`events: List<ParsedIcsEvent>` + `warnings: List<String>`).
-`ParsedIcsEvent` ist die Parse-Variante von `IcsEvent` (gleiche Felder, aber
-`uid: String?` — eine eingelesene `VEVENT` kann ohne UID kommen). Zwei Adapter:
-`ParsedIcsEvent.toEventForm(zone)` (Einzel-Öffnen → `EventForm`) und eine
-Repository-Methode `importEvents(targetCalendarId, events)` → `ImportSummary`
-(Bulk). Datei-IO (`Uri` lesen, Intent) liegt in `data/ics/` bzw. der
-Activity/Compose-Schicht; Routing 1-vs-viele entscheidet anhand der geparsten
-Event-Anzahl.
-
-**Liberal-in/strict-out (Leitprinzip):** unbekannte Properties, fremde
-`VTIMEZONE`-Blöcke und `RECURRENCE-ID`-Ausnahmen werden **übersprungen und im
-Report vermerkt**, nie still verschluckt; ein einzelnes kaputtes `VEVENT` lässt
-den Rest der Datei durch.
-
-**Leitentscheidungen:**
-
-1. **Parse-Mechanik (Umkehr von `IcsText`):** zuerst **Unfolding** (CRLF +
-   Space/Tab → wegfalten), dann pro Zeile `NAME[;params]:value` zerlegen,
-   TEXT-Werte **unescapen** (`\\` `\;` `\,` `\n`). Eine reine, einzeln getestete
-   Schicht (`IcsLineParser`), nicht ad hoc im Walker.
-2. **Datum/Zeit-Parsing (Umkehr der Writer-Zeitzonenregel):**
-   - `VALUE=DATE` (`YYYYMMDD`) → all-day, Instant auf UTC-Mitternacht (wie der
-     Provider all-day speichert), exklusives `DTEND` bleibt exklusiv.
-   - `…T…Z` → UTC-Instant.
-   - `…T…` mit `TZID=<zone>` → lokale Wandzeit in der Zone, aufgelöst gegen die
-     **OS-tz-Datenbank** (`TimeZone.of`); unbekannte/fehlende `TZID` →
-     Gerätezone als Fallback (+ Warnung).
-   - Kein `VTIMEZONE`-Parsing — `TZID` wird gegen die OS-DB aufgelöst (s. Branch-1
-     Entscheidung); ein `VTIMEZONE`-Block wird übersprungen (Warnung nur, wenn
-     seine `TZID` nicht in der OS-DB ist).
-3. **Routing 1-vs-viele:** genau **eine** `VEVENT` → vorausgefülltes
-   Erstellen-Formular (`ParsedIcsEvent.toEventForm`, `calendarId=null` →
-   Formular wählt wie gehabt den zuletzt genutzten Kalender vor). **Mehr als
-   eine** → Bulk-Import-Screen (Ziel-Kalender-Picker, nur beschreibbare). Leere
-   Datei → freundlicher „nichts gefunden"-Hinweis.
-4. **UID-Dedup beim Bulk-Import:** vor dem Insert die vorhandenen
-   `Events.UID_2445` des Ziel-Kalenders lesen; eine eingelesene UID, die schon
-   existiert, wird **übersprungen** (gezählt als „bereits vorhanden"). v1:
-   skip-not-update — kein Überschreiben, das hält den Restore idempotent und
-   verlustfrei. Events ohne UID bekommen beim Insert eine frische
-   (`UUID@calendula`, wie `insertEvent`).
-5. **Empfang via Intent:** Manifest-`ACTION_VIEW`/`SEND` mit MIME `text/calendar`
-   (+ `.ics`-Pfadmuster für `file`/`content`-Schemes). `MainActivity`
-   (`singleTop`, wie beim Reminder-Tap) liest den `Uri`, parst, und reicht das
-   Ergebnis als Compose-State an `CalendarHost` (gleiches Key-Muster wie der
-   Notification-Deep-Link).
-6. **Reminder/Status/Transp zurück:** `VALARM` `TRIGGER` (negatives `-PT…`,
-   `PT0…`) → Lead-Minuten; `STATUS`/`TRANSP` → `EventStatus`/`Availability`.
-   `DURATION`-statt-`DTEND` über `parseRfc2445DurationMillis` (existiert aus
-   Branch 1). Attendees werden **nicht** importiert (kein Modell; Warnung wenn
-   vorhanden).
-
-**Recherche-Befunde (Codebase, 2026-06-18 — aus Branch 1):**
-- `IcsText.escapeText`/`foldLine` + `IcsWriter` existieren; Parser spiegelt sie.
-- `parseRfc2445DurationMillis` (in `IcsExportMapper.kt`) parst die
-  Provider-`DURATION`-Formen inkl. des nicht-standardkonformen `P<n>S`.
-- `EventForm` (Domain): Zeiten als `LocalDateTime` in Gerätezone, `calendarId`
-  nullable; das Formular wählt bei `null` den zuletzt genutzten Kalender vor.
-- `insertEvent` schreibt bereits `Events.UID_2445`; für den Import muss eine
-  **vorgegebene** UID durchgereicht werden (Insert-Variante / Parameter).
-
----
-
-## Tasks
-
-**Parser-Engine (`domain/ics/`, reine Kotlin, JVM-Tests):**
-- [x] `IcsText`: `unescapeText` + `unfold(lines)` ergänzen (+ Test)
-- [x] `IcsLineParser`: `NAME;PARAM=v;PARAM=v:VALUE` → (name, params-map, value);
-      Param-Werte ggf. in Quotes; Test (Kantenfälle: Doppelpunkt im Wert,
-      gequotete Params)
-- [x] `ParsedIcsEvent` (wie `IcsEvent`, aber `uid: String?`) + Datum/Zeit-Parser
-      (`VALUE=DATE` / `…Z` / `TZID` → Instant + isAllDay + zoneId)
-- [x] `IcsParser.parse(text)` → `IcsParseResult(events, warnings)`: VCALENDAR/
-      VEVENT-Walk, skip-and-report für `RECURRENCE-ID`/unbekannte `VTIMEZONE`/
-      Attendees; ein defektes VEVENT killt nicht den Rest. **Round-trip-Test**
-      gegen `IcsWriter`-Ausgabe (all-day, getimt, wiederkehrend+TZID, Reminder)
-      + Fremd-Quirks (gefaltete Zeilen, fehlende UID, `PT…`-Trigger)
-
-**Datenschicht (`data/calendar/` + `data/ics/`):**
-- [x] `ParsedIcsEvent.toEventForm(zone)` (Einzel-Öffnen → `EventForm`); Test
-- [x] Datasource: `existingUids(calendarId)` (Query `Events.UID_2445`) +
-      `insertImported(event, calendarId)` (Insert mit vorgegebener/erzeugter UID)
-- [x] Repository `importEvents(targetCalendarId, events)` → `ImportSummary`
-      (imported / skippedDuplicate / skippedUnsupported); UID-Dedup; Test mit
-      Fake-Datasource
-- [x] `IcsImporter` (`data/ics/`): `Uri` → Text lesen (UTF-8, `contentResolver`)
-
-**Intent + Routing:**
-- [x] Manifest: `ACTION_VIEW`/`ACTION_SEND`, MIME `text/calendar`, `.ics`-
-      Pfadmuster (`file`/`content`); `MainActivity` parst eingehenden `Uri`
-- [x] Routing in `CalendarHost`: 1 Event → Erstellen-Formular vorausgefüllt;
-      >1 → Bulk-Import-Screen; 0 → Hinweis
-
-**UI:**
-- [x] Bulk-Import-Screen: Ziel-Kalender-Picker (OptionCard, nur beschreibbare),
-      Anzahl/Vorschau, Import-Button → `ImportSummary` als Ergebnis
-- [x] Einzel-Öffnen: `EventEditScreen` mit vorausgefülltem Formular (neuer
-      Prefill-Pfad im `EventEditViewModel`, ohne `eventId`)
-- [x] Strings DE+EN: Import-Titel, Ziel-Auswahl, Ergebnis-Plurals
-      (importiert / übersprungen-vorhanden / übersprungen-nicht-unterstützt),
-      leere-Datei-Hinweis
-
-**Abschluss:**
-- [x] `./gradlew lint test assembleDebug` grün
-- [ ] CHANGELOG done; ROADMAP/STATE pending; v2.7 cut **erst** wenn beide
-      Branches gemerged sind und On-Device-Review durch ist

docs/superpowers/specs/2026-06-08-calendar-app-design.md

@@ -1,406 +0,0 @@
-# Calendula - V1 Design Spec
-
-**Date:** 2026-06-08
-**Status:** Draft for review
-**Author:** Jean-Luc Makiola (with Claude)
-
-## 1. Motivation & Goal
-
-Eine Android-native, Open-Source-Kalender-App im Material 3 Expressive Design.
-Schließt die Lücke, dass es derzeit keinen optisch zeitgemäßen Kalender abseits
-von Google Calendar gibt - speziell mit dem 2025er Expressive-Design.
-
-**Was die App NICHT macht:**
-- Eigene CalDAV/iCal-Synchronisation - das übernimmt der Android `CalendarContract`
-  bzw. Drittsoftware wie DAVx5
-- Eigene lokale Event-DB - alle Daten leben im `CalendarContract`
-
-**Was die App macht:**
-- Schöne, moderne UI über Android-Bordmittel
-- Liest aus `CalendarContract` (alle Quellen: Nextcloud/CalDAV via DAVx5,
-  Google, lokal, WebCal-Subscriptions)
-- V1 ist read-only; Schreibrechte kommen in V2
-
-## 2. Scope - V1 MVP (Variante "B")
-
-### In-Scope
-- 3 Hauptansichten: Monat, Woche, Tag
-- Event-Detail-Sheet (read-only Detailansicht)
-- Multi-Kalender-Toggle (Sichtbarkeit pro Kalender)
-- Heute-Button (Jump-to-Date gestrichen, siehe Out-of-Scope)
-- Settings-Screen (Theme, Dynamic Color, Wochenstart, Sprache)
-- Permission-Flow für `READ_CALENDAR`
-- Empty-States und Error-Recovery
-- DE + EN Lokalisierung
-- Tests + CI ab Tag 1
-
-### Out-of-Scope (V2+)
-- Jump-to-Date / Datum-Picker (aus V1-Scope gestrichen)
-- Event-Create/Edit/Delete (V2)
-- Home-Screen-Widget
-- Volltextsuche
-- Quick-Add
-- Notifications/Reminders (System macht das schon, nicht doppeln)
-- Tablet-/Foldable-spezifische Layouts
-- iOS (Kotlin-Native ist explizit Android-only)
-
-## 3. Tech Stack
-
-| Layer | Wahl | Begründung |
-|---|---|---|
-| Sprache | Kotlin 2.0+ | Android-Native-Standard |
-| UI | Jetpack Compose + Material3 Expressive (1.5+) | Echter M3 Expressive Support |
-| Min SDK | 29 (Android 10) | Modern, keine Compat-Pfade |
-| Target SDK | 36 (Android 16) | Aktuell, wie HouseHoldKeaper CI |
-| DI | Hilt | Industriestandard |
-| Persistenz Prefs | DataStore (Preferences) | Theme, Wochenstart, Filter-State |
-| Persistenz Daten | keine | Source of Truth bleibt `CalendarContract` |
-| Datum/Zeit | `kotlinx.datetime` (Domain), `java.time` an Provider-Grenze | Saubere API |
-| Navigation | Compose Navigation, Single-Activity | Standard |
-| Lokalisierung | Android Resources (`strings.xml`) + Plurals | DE + EN ab V1 |
-| Tests | JUnit5, Truth, Turbine, Compose UI Test | JVM-first, Instrumented nur für ContentResolver-Integration |
-| Build | Gradle Kotlin DSL + Version Catalog | Lesbar, typsicher |
-| CI | Gitea Workflows (adaptiert von HouseHoldKeaper) | Gleiche Konvention wie restliche Projekte |
-
-### Permissions
-- `READ_CALENDAR` (einzige Runtime-Permission)
-- `android.permission.QUERY_ALL_PACKAGES` **nicht** nötig (Maps-Intent geht ohne)
-
-### App-Identifier
-- **App-Name:** Calendula (vom lateinischen *kalendae* - "der erste Tag des Monats", Wortwurzel von "Kalender"; gleichzeitig der Name der Ringelblume)
-- **Package:** `de.jeanlucmakiola.calendula`
-- Convention identisch zu `HouseHoldKeaper`: `de.jeanlucmakiola.<app_name>`
-
-## 4. Architektur
-
-### Modul-Struktur
-Single Gradle module `:app` für V1. Feature-Split (`:core`, `:feature-*`) erst
-wenn nötig - YAGNI.
-
-### Package-Layout
-```
-de.jeanlucmakiola.calendula/
-├── CalendulaApp.kt + MainActivity.kt
-├── data/          ContentResolver-Wrapper, Repositories
-├── domain/        Pure-Kotlin Models (Event, CalendarSource)
-└── ui/
-    ├── theme/     M3 Expressive Theme, Dynamic Color
-    ├── month/     Monatsansicht (Composable + ViewModel + State)
-    ├── week/      Wochenansicht
-    ├── day/       Tagesansicht
-    ├── detail/    Event-Detail-Sheet
-    ├── filter/    Kalender-Filter-Sheet
-    ├── settings/  Settings-Screen
-    ├── permission/ Permission-Request-Screen
-    └── common/    Geteilte Composables (LoadingScreen-Helper, FailureScreen-Helper)
-```
-
-### Layer-Verantwortlichkeiten
-- **data/**: Nur Layer der Android-Klassen kennt (`ContentResolver`, `Cursor`,
-  `CalendarContract`). Mapped auf Domain-Modelle.
-- **domain/**: Pure Kotlin. Keine Android-Imports.
-- **ui/**: Compose-Code, ViewModels. Hängt von domain ab, niemals direkt an data.
-
-## 5. Datenfluss & Domain-Modell
-
-### Domain-Modelle (pure Kotlin)
-
-```kotlin
-data class CalendarSource(
-    val id: Long,
-    val displayName: String,
-    val accountName: String,    // z.B. "jlmak@nextcloud.example.com"
-    val accountType: String,    // z.B. "at.bitfire.davdroid" (DAVx5), "com.google" (Google), "LOCAL"
-    val color: Int,
-    val isVisibleInSystem: Boolean,  // CalendarContract.Calendars.VISIBLE
-)
-
-data class EventInstance(
-    val instanceId: Long,        // Instances._ID (eindeutig pro Vorkommen)
-    val eventId: Long,           // Events._ID (gleich für alle Vorkommen)
-    val calendarId: Long,
-    val title: String,
-    val start: Instant,
-    val end: Instant,
-    val isAllDay: Boolean,
-    val color: Int,              // Effektiv: Event.color ?: Calendar.color
-    val location: String?,
-)
-
-data class EventDetail(
-    val instance: EventInstance,
-    val description: String?,
-    val organizer: String?,
-    val attendees: List<Attendee>,
-    val rrule: String?,          // Read-only: nur "wiederkehrt wöchentlich" anzeigen
-)
-
-data class Attendee(val name: String, val email: String?, val status: AttendeeStatus)
-enum class AttendeeStatus { Accepted, Declined, Tentative, NeedsAction, Unknown }
-```
-
-### Repository
-
-```kotlin
-interface CalendarRepository {
-    fun calendars(): Flow<List<CalendarSource>>
-    fun instances(range: ClosedRange<Instant>): Flow<List<EventInstance>>
-    suspend fun eventDetail(eventId: Long): EventDetail
-}
-```
-
-**Implementation-Details:**
-- Hält `ContentObserver` auf `CalendarContract.CONTENT_URI` registriert
-- Bei Observer-Trigger: re-query, emit neuer Wert via SharedFlow
-- Queries laufen auf `Dispatchers.IO`
-- `instances(range)` nutzt `CalendarContract.Instances.CONTENT_BY_DAY_URI`
-  oder `CONTENT_URI` mit Time-Range - Recurrence-Expansion macht der Provider
-- App-eigene "ausgeblendete Kalender-IDs" leben in DataStore als `Set<Long>`,
-  kombinieren via `combine()` mit Calendar-Flow
-
-### ViewModel-Pattern
-
-Ein ViewModel pro Top-Level-Screen. State immer als sealed interface
-(siehe Section 7 - Loading/Failure/Success).
-
-ViewModel kennt aktuelle "Cursor"-Position (welcher Monat/Woche/Tag) und
-fragt Repository nur für sichtbaren Range an - kein "alle Events der Welt".
-
-## 6. Screens & Menüs
-
-### Hauptscreens
-
-**S1 - Monatsansicht**
-- Zeigt einen Monat im Überblick
-- Pro Tag erkennbar: hat-Events / keine-Events, ggf. Andeutung über Anzahl/Farbe
-- Navigation: vorwärts/zurück zwischen Monaten
-- Tap auf Tag → Tagesansicht für diesen Tag
-- Heute deutlich markiert
-
-**S2 - Wochenansicht**
-- Zeigt eine Woche mit Zeitschiene
-- Events auf ihrer Uhrzeit, Calendar-Farbe
-- Overlap-Events: nebeneinander aufgelöst
-- All-Day-Events extra dargestellt
-- Navigation: vorwärts/zurück zwischen Wochen
-- Tap Event → Event-Detail-Sheet
-
-**S3 - Tagesansicht**
-- Eine Spalte, mehr Detail pro Event als Wochenansicht
-- All-Day-Events extra
-- Navigation: vorwärts/zurück zwischen Tagen
-- Tap Event → Event-Detail-Sheet
-
-**S4 - Event-Detail-Sheet (Bottom-Sheet, ModalBottomSheet)**
-- Pflicht-Inhalte: Titel, Start/Ende oder "Ganztägig", Kalender-Zugehörigkeit
-- Konditional: Ort (Tap → Maps-Intent), Beschreibung, Teilnehmer, RRULE-Hinweis
-- Dismissable via Drag oder Back-Geste
-
-### Menüs
-
-**M1 - View-Switcher**
-- Wechsel zwischen Monat / Woche / Tag
-- Immer erreichbar von allen Hauptansichten
-- State persistent (zuletzt aktive Ansicht)
-
-**M2 - Heute**
-- Schnell zurück zu "heute" (Drawer-Eintrag, ausgeliefert in v0.5)
-- ~~Springe zu beliebigem Datum via Datum-Picker~~ — **gestrichen**, siehe Out-of-Scope
-- Erreichbar von allen Hauptansichten
-
-**M3 - Kalender-Filter (Bottom-Sheet)**
-- Sichtbare Kalender ein-/ausblenden
-- Gruppiert pro Account (Nextcloud / Local / Google / …)
-- Pro Eintrag: Name, Calendar-Farbe
-- Persistiert in DataStore
-- Erreichbar von allen Hauptansichten
-
-**M4 - Settings**
-- Theme: System / Light / Dark
-- Dynamic Color: an/aus (auto disabled wenn API < 31)
-- Wochenstart: Auto (aus Locale) / Mo / So
-- Sprache: Auto / DE / EN
-- About: Version, Lizenz, Link zum Quellcode (Gitea)
-
-### Spezial-Flows
-
-**F1 - Erst-Start / Permission-Flow**
-- Beim ersten App-Start: `READ_CALENDAR`-Request
-- Erklärungs-Text: "Wir lesen nur deinen Gerätekalender - keine Daten verlassen das Gerät"
-- Bei Denial: friendlicher Recovery-Screen mit Re-Request-Button + Link zu System-Settings
-
-**F2 - Empty-State (keine Kalender / keine Events)**
-- Keine Kalender konfiguriert: Hinweis "Füge in DAVx5 oder System-Settings einen Kalender hinzu" mit Intent-Link zu System-Calendar-Settings
-- Kalender da, aber aktuelle Ansicht leer: dezent, kein nerviger Placeholder
-
-**F3 - Reaktion auf externe Änderungen**
-- DAVx5/System-Calendar ändert sich → App aktualisiert sich automatisch via ContentObserver
-- Kein manueller Pull-to-Refresh
-
-## 7. UI-State-Modell: Loading / Failure / Success
-
-**Pflicht-Pattern für jeden Screen.** Keine Ausnahmen.
-
-### ViewModel-State
-
-```kotlin
-sealed interface MonthUiState {
-    data object Loading : MonthUiState
-    data class Failure(val reason: FailureReason) : MonthUiState
-    data class Success(
-        val month: YearMonth,
-        val eventsPerDay: Map<LocalDate, List<EventInstance>>,
-        val visibleCalendars: List<CalendarSource>,
-    ) : MonthUiState
-}
-
-enum class FailureReason {
-    PermissionRevoked,        // → Re-Request-Screen
-    NoCalendarsConfigured,    // → Empty-State mit Intent zu System-Settings
-    ProviderUnavailable,      // → Retry-Screen
-    EventNotFound,            // → nur für Event-Detail-Sheet
-    Unknown,                  // → Fallback
-}
-```
-
-### Composable-Dispatch
-
-```kotlin
-@Composable
-fun MonthScreen(viewModel: MonthViewModel) {
-    val state by viewModel.state.collectAsStateWithLifecycle()
-    when (val s = state) {
-        is MonthUiState.Loading -> MonthLoadingScreen()
-        is MonthUiState.Failure -> MonthFailureScreen(s.reason, onRetry = viewModel::retry)
-        is MonthUiState.Success -> MonthSuccessScreen(s, ...)
-    }
-}
-```
-
-### Pflicht-Composables pro Screen
-
-| Screen | Loading | Failure-Varianten | Success |
-|---|---|---|---|
-| Monat | Skelett-Grid (Shimmer) | Permission, NoCalendars, Provider | Grid mit Events |
-| Woche | Skelett-Schiene | Permission, NoCalendars, Provider | Schiene mit Events |
-| Tag | Skelett-Schiene | Permission, NoCalendars, Provider | Schiene mit Events |
-| Event-Detail | kompakter Skelett-Sheet | EventNotFound, Provider | Voll-Detail |
-| Kalender-Filter | Skelett-Liste | Provider | Liste |
-| Settings | sofort (DataStore ist instant) | - | direkt |
-
-**Regeln:**
-- Loading ist ein bewusst gestalteter Screen (Skeleton + Shimmer), kein loser Spinner
-- Failure ist ein eigener Screen mit Erklärung + Recovery-Action, kein Toast
-- Beim UI-Design später: alle drei Varianten pro Screen skizzieren, nie nur Success
-- Tests: pro Screen mindestens `renders_loading`, `renders_failure`, `renders_success`
-
-## 8. Error Handling & Edge Cases
-
-### Philosophie
-Calendar-Apps dürfen niemals an leeren/malformen Daten crashen. Defensive
-Validierung im Repository, kaputte Instanzen still droppen + via `Log.w` loggen.
-
-### Konkrete Fehlerfälle
-| Fall | Verhalten |
-|---|---|
-| ContentResolver-Query wirft (Permission revoked zur Laufzeit) | State → `Failure(PermissionRevoked)`, UI zeigt Re-Request |
-| Calendar `displayName` null | Fallback "(Unbenannter Kalender)" |
-| Event `title` null/leer | Fallback "(Ohne Titel)" |
-| `dtend < dtstart` | Event droppen, Warn-Log |
-| `dtstart` vor Unix-Epoch | Event droppen, Warn-Log |
-| Maps-Intent fehlt | SnackBar "Keine Karten-App installiert" |
-| DataStore-IO-Fehler | Defaults verwenden, weiter, Warn-Log |
-
-### Edge Cases im UI
-- **All-Day-Events über mehrere Tage:** in Wochen-/Tagesansicht über mehrere
-  Tage gespannter All-Day-Strip
-- **Events über Mitternacht:** in Wochen-/Tagesansicht am Folgetag fortsetzen
-- **Instant Events (start == end):** Mindesthöhe rendern für Tap-Target
-- **Viele Events an einem Tag:** in Monatsansicht "+N more" statt Overflow
-- **Timezones:** alle Berechnungen in Geräte-Local-TZ, außer all-day = floating
-
-## 9. i18n & Accessibility
-
-### i18n
-- `res/values/strings.xml` = englische Master-Strings
-- `res/values-de/strings.xml` = deutsche Übersetzungen
-- Alle Strings extrahiert, auch Plurals (`<plurals>` für "1 Event" / "N Events")
-- Wochentags-/Monatsnamen via `java.time.format.DateTimeFormatter` mit aktiver
-  Locale (kein Hardcoding)
-- Sprach-Override aus Settings via `AppCompatDelegate.setApplicationLocales`
-
-### Accessibility (V1-Minimum)
-- Alle interaktiven Elemente: `contentDescription`, Tap-Target ≥ 48dp
-- Event-Items: semantisches Label "Titel, Start-Zeit, Dauer, Kalender X"
-- Calendar-Color **immer** mit Label/Form kombiniert (nie nur-Farbe-Information)
-- Dynamic-Text-Size respektiert (keine fixen sp-Werte für Text)
-- Hoher-Kontrast: M3-Theme reagiert automatisch
-- TalkBack-Smoke-Tests im UI-Test-Plan
-
-## 10. Testing
-
-Best Practices, kein Diskussionsbedarf:
-- **Unit-Tests:** JUnit5 + Truth + Turbine. Repository, ViewModels, Date/Time-Helpers,
-  ContentResolver-Wrapper (mit Mock-Cursor)
-- **UI-Tests:** Compose UI Test pro Screen, mindestens `renders_loading` /
-  `renders_failure` / `renders_success` + 1-2 Interaktions-Tests
-- **Coverage-Ziel:** pragmatisch ~70% lines, 100% für Repository + Date-Logik.
-  Kein Coverage-Gate in CI, aber Pflicht-Run
-- **Instrumented-Tests:** nur für ContentResolver-Integration (echte
-  CalendarContract-Queries auf Emulator)
-
-## 11. CI/CD
-
-Adaption der `HouseHoldKeaper`-Pipeline, nur Flutter-Steps durch Gradle ersetzt.
-
-### `.gitea/workflows/ci.yaml` (push + PR)
-- Setup Java 17 + Android SDK 36
-- `./gradlew lint`
-- `./gradlew test`
-- `./gradlew assembleDebug`
-- Trivy Filesystem-Scan (HIGH/CRITICAL, `continue-on-error` wie HHK)
-
-### `.gitea/workflows/release.yaml` (auf Git-Tags)
-- Alles aus `ci.yaml`
-- Version aus Git-Tag in `app/build.gradle.kts`:
-  - `versionName = "${tag#v}"`
-  - `versionCode = MAJOR*10000 + MINOR*100 + PATCH` (HHK-Konvention)
-- Keystore aus Gitea Secrets (`KEYSTORE_BASE64`, `KEY_PASSWORD`, `KEY_ALIAS`)
-- `./gradlew assembleRelease`
-- F-Droid-Pipeline 1:1 wie HHK: Hetzner-Sync, `fdroid update -c`, Re-Upload
-
-### Repo-Konventionen
-- `CHANGELOG.md` wird beim Taggen gepflegt (patch/minor/major)
-- `fdroid-metadata/de.jeanlucmakiola.calendula/` Verzeichnis-Struktur
-- `LICENSE` = MIT, Jean-Luc Makiola, 2026
-- `.planning/` mit `PROJECT.md`, `REQUIREMENTS.md`, `ROADMAP.md`, `STATE.md`
-
-## 12. Design-Decisions (gelöst)
-
-### Theme-Seed-Color (Fallback wenn kein Dynamic Color verfügbar)
-**`0xFF5C6B7A`** - desaturiertes Schiefer-Blaugrau.
-- Bewusst anders als HouseHoldKeaper's Sage (`0xFF7A9A6D`), damit beide Apps unterscheidbar sind
-- Mid-Saturation → M3 Expressive Dynamic Color generiert daraus eine ausgewogene Palette
-- Cool aber nicht kalt → passt zu "modern functional"
-- Funktioniert in Light- und Dark-Theme
-
-### App-Icon (Adaptive Launcher)
-**Statische "1" auf M3-Expressive-Squircle.**
-- **Foreground:** Stilisierte Ziffer "1" (bold), zentriert auf einem Squircle
-- **Background:** Seed-Color `0xFF5C6B7A` (slate)
-- **Bedeutung:** Die "1" referenziert *kalendae* (der erste Tag des Monats) - Wortwurzel sowohl von "Kalender" als auch "Calendula". Die App heisst Calendula, aber das Icon zeigt klar: dies ist ein Kalender.
-- Adaptive-Icon-Spec: Foreground 432dp x 432dp Safe-Zone in 108dp Tile, Background fest
-- Vektor-basiert (kein PNG), in `res/drawable/ic_launcher_*.xml` als VectorDrawable
-
-### Konkretes UI-Layout pro Screen
-**Bewusst offen** - wird in eigener UI-Design-Iteration nach Spec-Approval entworfen
-(Mockups pro Screen, alle drei States, vor Implementation).
-
-## 13. Nächste Schritte nach Spec-Approval
-
-1. Implementation-Plan via `writing-plans`-Skill aus diesem Spec ableiten
-2. Initiales Gradle-Projekt-Scaffolding
-3. Tooling: Lint-Config, Detekt o.ä., CI-Workflows initial
-4. Iterative UI-Design-Phase (Mockups pro Screen, alle drei States,
-   bevor implementiert wird)
-5. Feature-by-Feature-Implementation gegen den Plan

fastlane/metadata/android/de-DE/full_description.txt

@@ -10,6 +10,12 @@ Serie) und einem einfachen Wiederholungs-Picker. Erinnerungen stellt
 Calendula selbst als Benachrichtigung zu — ein Tipp darauf öffnet den
 Termin.
 
+Optional lassen sich Geburtstage, Jahrestage und weitere besondere Tage
+deiner Kontakte im Kalender anzeigen. Du schaltest das selbst ein; Kontakte
+werden nur auf deinem Gerät gelesen, nie hochgeladen und nie verändert —
+Calendula spiegelt die Daten lediglich in lokale Kalender, die du voll
+kontrollierst.
+
 Der Unterschied liegt im Design: echtes Material 3 Expressive durchgehend,
 mit Dynamic Color, expressiven Animationen und neuen Shape-Sprachen.
 

fastlane/metadata/android/en-US/changelogs/21300.txt

@@ -0,0 +1,70 @@
+### Added
+- Calendula now speaks Spanish and Italian. Both arrived as community
+  translations through [Calendula's Weblate](https://weblate.dev.jeanlucmakiola.de/projects/calendula/)
+  — a **huge thank you** to
+  [kikerw](https://weblate.dev.jeanlucmakiola.de/user/kikerw/) for the Spanish
+  translation and to
+  [corrent](https://weblate.dev.jeanlucmakiola.de/user/corrent/) for the Italian
+  one! Pick your language under Settings → Language or in Android's per-app
+  language settings. Strings added in this very release may still show in
+  English until the translations catch up. Want Calendula in your language?
+  Translating happens entirely in the browser — every contribution is welcome.
+- See your contacts' birthdays and anniversaries in your calendar. A new,
+  **optional** feature (Settings → Contact special dates) mirrors your contacts'
+  birthdays, anniversaries and other dates into local "Birthdays",
+  "Anniversaries" and "Other dates" calendars that stay in sync as your contacts
+  change. Each is a normal local calendar, so you set its colour, visibility and
+  reminders the usual way — new birthdays even start with a reminder a week before
+  *and* on the day. The title format is yours to customise (`{name}`, `{year}`).
+  This is the first feature to use the contacts permission: it is requested only
+  when you turn the feature on, everything stays on your device (Calendula has no
+  internet access), and your contacts are only ever read, never changed. Thanks
+  to @moonj for the suggestion ([#15]).
+- Set more than one default reminder per calendar. A calendar's default
+  reminders — and the global defaults under Settings → Notifications — can now
+  hold several lead times instead of just one, so new events can start with, say,
+  a reminder a week before *and* one on the day. The reminder pickers are now
+  multi-select; per-calendar overrides can still inherit the global default or
+  turn reminders off entirely. Thanks to @moonj for the suggestion ([#14]).
+- Widget headers now open the app. Tapping the month/year title on the month
+  widget opens the app on the month view, and tapping the "Upcoming" title on
+  the agenda widget opens it on your default view — so there's a one-tap way
+  back into the app that lands where you'd expect, instead of only through a day
+  or event. On the month widget, tapping anywhere on a day — not just the small
+  date number — now opens that day, and the "today" button snaps the grid back
+  to the current month in place. Thanks to @rgz46vic and @ptab for the
+  suggestions ([#18], [#20]).
+- Make Calendula's text your own. Settings → Appearance gains **Headings font**
+  and **Body font** pickers: keep the system default, choose a bundled face
+  (Atkinson Hyperlegible, Lora, JetBrains Mono — each previewed in its own
+  face), or load any `.ttf`/`.otf` file from your device, independently per
+  role. Font size and colour stay with Android's accessibility scaling and the
+  app theme, as discussed on the issue. Thanks to @abrossimow for the
+  suggestion ([#19]).
+- Choose what the view-switch button cycles through. Settings → Appearance now
+  lets you pick which views the top-right quick-switch button rotates between
+  and drag them into your preferred order; views you switch off stay reachable
+  from the navigation menu, which can be reordered the same way. Thanks to
+  @abrossimow for the suggestion ([#24]).
+
+### Fixed
+- Month widget arrows and "today" button work again. On release builds the
+  prev/next-month arrows and the jump-to-today control on the month widget did
+  nothing when tapped — code shrinking had stripped the tap handlers behind
+  them. They respond again. Thanks to @rgz46vic for the report ([#18]).
+- Disabled calendars no longer notify. Reminders for events in a calendar you
+  have disabled (Settings → Calendars) are now suppressed instead of still
+  popping up — matching how a disabled calendar's events already stay hidden
+  everywhere else in the app ([#17]).
+- Editing a single occurrence of a recurring event works again. Choosing **Only
+  this event** and saving a change to one event in a repeating series silently
+  did nothing — the change was rejected and the edit form simply reappeared with
+  nothing applied. The edited occurrence is now stored correctly, so the change
+  lands on just that one event and leaves the rest of the series untouched
+  ([#16]).
+- Every calendar can be picked when creating an event. The event editor's
+  calendar picker was a fixed-height dialog, so with many calendars anything
+  past the first nine or so was simply unreachable. It is now a full-screen,
+  scrollable list grouped by account, with each calendar's colour shown.
+  Thanks to @dschuermann for the report ([#29]).
+

fastlane/metadata/android/en-US/changelogs/21301.txt

@@ -0,0 +1,16 @@
+### Added
+- Create events from other apps and widgets. Calendula now registers the
+  standard "insert event" intent, so other apps and home-screen widgets (such as
+  the Todo Agenda widget) can hand off to Calendula to create a new event — it
+  opens the new-event form prefilled with whatever they passed (title, time,
+  location, description). Thanks to @dschuermann for the suggestion ([#30]).
+
+### Fixed
+- Some recurring events could not be opened. Events in a series that started
+  before 1970 — for example yearly birthdays or anniversaries synced over CalDAV
+  — showed "Something went wrong" instead of opening. They now open normally, and
+  show up in search again. Thanks to @dschuermann for the report ([#34]).
+- The time picker now follows your 24-hour setting. With Calendula set to
+  24-hour time, the dial for choosing an event's start and end time still showed
+  AM/PM; it now matches your setting. Thanks to @abrossimow for the report
+  ([#27]).

fastlane/metadata/android/en-US/full_description.txt

@@ -8,6 +8,11 @@ changes (only this event / this and all following / the whole series) and a
 simple repeat picker. Calendula also delivers your event reminders as
 notifications — tap one and you're on the event.
 
+Optionally, show your contacts' birthdays, anniversaries and other special
+dates in your calendar. You turn this on yourself; contacts are read only on
+your device, are never uploaded, and are never changed — Calendula only
+mirrors the dates into local calendars you fully control.
+
 The differentiator is the design: real Material 3 Expressive throughout,
 with dynamic color, expressive motion, and expressive shapes.