feat(intent): create events from external ACTION_INSERT launches (#30)

Register an intent-filter for ACTION_INSERT on the events dir mime type
(vnd.android.cursor.dir/event), the way the AOSP calendar accepts one, so
other apps and widgets (e.g. the Todo Agenda widget) can launch Calendula
to create a new event.

MainActivity.insertFormOrNull parses the standard CalendarContract extras
(EXTRA_EVENT_BEGIN_TIME/END_TIME/ALL_DAY, Events.TITLE/DESCRIPTION/
EVENT_LOCATION/RRULE) into a prefilled EventForm via the pure, unit-tested
buildInsertEventForm — omitted fields fall back to the same defaults the
in-app "new event" uses (next full hour, +1h). The form is routed through
the existing single-event prefill channel (RootScreen → CalendarHost →
the create form for review), with calendarId left null so it resolves to
the last-used / first-writable calendar. No new permission is needed
(WRITE_CALENDAR is already held), and the user still explicitly saves.

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

CHANGELOG.md

@@ -5,9 +5,30 @@ 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]
+## [2.13.0] — 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 +43,18 @@ 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 +71,11 @@ 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 +802,11 @@ 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
+[#29]: https://codeberg.org/jlmakiola/calendula/issues/29

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
-        versionName = "2.12.0"
+        versionCode = 21300
+        versionName = "2.13.0"
 
         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, "${UUID.randomUUID()}@calendula")
-            put(CalendarContract.Events.TITLE, form.title.trim())
-            put(CalendarContract.Events.ALL_DAY, if (form.isAllDay) 1 else 0)
-            put(CalendarContract.Events.DTSTART, times.dtStartMillis)
-            // The provider's invariant: recurring rows carry RRULE+DURATION
-            // (and no DTEND), one-off rows carry DTEND.
-            if (form.rrule == null) {
-                put(CalendarContract.Events.DTEND, times.dtEndMillis)
-            } else {
-                put(CalendarContract.Events.RRULE, form.rrule)
-                put(CalendarContract.Events.DURATION, times.toRfc2445Duration(form.isAllDay))
-            }
-            put(CalendarContract.Events.EVENT_TIMEZONE, times.timezone)
-            put(CalendarContract.Events.AVAILABILITY, form.availability.toProviderValue())
-            put(CalendarContract.Events.ACCESS_LEVEL, form.accessLevel.toProviderValue())
-            form.location.trim().takeIf { it.isNotEmpty() }
-                ?.let { put(CalendarContract.Events.EVENT_LOCATION, it) }
-            form.description.trim().takeIf { it.isNotEmpty() }
-                ?.let { put(CalendarContract.Events.DESCRIPTION, it) }
+        val values = buildEventInsertValues(
+            form,
+            uid = "${UUID.randomUUID()}@calendula",
+            times = form.toWriteTimes(ZoneId.systemDefault()),
+        ).toContentValues().apply {
             // 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=${form.calendarId}")
         val eventId = ContentUris.parseId(uri)
-        // Best effort (spec §8): the event exists at this point — a reminder
-        // that fails to attach is logged, not surfaced as a failed create.
-        encodedReminders(form, allDayReminderTimeMinutes)
-            .forEach { minutes ->
+        seedReminders(eventId, form, allDayReminderTimeMinutes)
+        // Guests are best-effort like reminders: a row that fails to attach is
+        // logged, not surfaced as a failed create. Calendula never sends an
+        // invitation — it only writes the rows; the backend decides delivery.
+        insertAttendees(eventId, form.attendees)
+        return eventId
+    }
+
+    /**
+     * Attach [form]'s reminders to a freshly inserted event. Best effort
+     * (spec §8): the event exists at this point — a reminder that fails to
+     * attach is logged, not surfaced as a failed create.
+     */
+    private fun seedReminders(eventId: Long, form: EventForm, allDayReminderTimeMinutes: Int) =
+        insertReminderRows(eventId, encodedReminders(form, allDayReminderTimeMinutes))
+
+    /** Insert one `METHOD_ALERT` reminder row per raw provider offset. */
+    private fun insertReminderRows(eventId: Long, encodedMinutes: List<Int>) {
+        encodedMinutes.forEach { minutes ->
             val reminder = ContentValues().apply {
                 put(CalendarContract.Reminders.EVENT_ID, eventId)
                 put(CalendarContract.Reminders.MINUTES, minutes)
@@ -628,11 +810,25 @@ class AndroidCalendarDataSource @Inject constructor(
                 Log.w(TAG, "Failed to attach reminder ($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)
-        return eventId
+    }
+
+    /**
+     * A managed all-day event's reminders, encoded so they fire at
+     * [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/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/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

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/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) {
-            textStyle.color
-        } else {
-            MaterialTheme.colorScheme.onSurface
+        color = when {
+            // A disabled field reads as dimmed, like a locked value.
+            !enabled -> MaterialTheme.colorScheme.onSurfaceVariant
+            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/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.
-    val valueColor = if (isError) {
-        MaterialTheme.colorScheme.error
-    } else {
-        MaterialTheme.colorScheme.primary
+    // detail screen; errors flip them to the error colour; a locked (managed)
+    // row dims to a plain, non-tappable value.
+    val valueColor = when {
+        !enabled -> MaterialTheme.colorScheme.onSurfaceVariant
+        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 }
-    }.catch { emit(emptyList()) }
+        calendars.filter { it.canModifyContents && it.id !in disabled && !it.isManaged }
+    }
 
     /** 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
-    // than a (non-composable) joinToString transform.
-    val parts = ArrayList<String>(minutes.size)
-    for (m in minutes) parts.add(reminderLeadTimeLabel(m))
-    return parts.joinToString(", ")
+    return minutes.map { reminderLeadTimeLabel(it) }.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 ->
-                ReminderOverrides(overrides, allDayOverrides, calendars)
+                prefs.managedCalendarIds,
+            ) { 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/res/values-es/strings.xml

@@ -6,4 +6,416 @@
         <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.</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">Nueva formulario de 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>
 </resources>

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

@@ -6,4 +6,416 @@
         <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>
 </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/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/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.

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/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.