diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6408bef..dc9ea17 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,23 @@ 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).
 
+## [2.20.1] — 2026-09-07
+
+### Fixed
+- **An empty calendar now explains itself.** "No calendars configured" offered
+  an "Open system calendar settings" button that opened nothing — every screen
+  wired it to the same reload that had just produced the empty state. It now
+  opens the system's account chooser, filtered to the providers that sync
+  calendars ([#239]).
+- **Calendars that are all switched off no longer look like an empty month.**
+  When every calendar on the device is hidden at system level there is nothing
+  to draw, but the app said nothing at all: it only ever checked whether the
+  device had *no* calendars, so a device that had them and hid them fell
+  through to a blank grid with no hint. That case now says so, and points at
+  Settings → Calendars — the one screen that can switch a calendar back on. The
+  navigation drawer's calendar list drew the same conflation and is fixed with
+  it ([#239]).
+
 ## [2.20.0] — 2026-09-07
 
 ### Added
@@ -1654,3 +1671,4 @@ automatically, with zero telemetry and no internet permission.
 [#150]: https://codeberg.org/jlmakiola/calendula/issues/150
 [#146]: https://codeberg.org/jlmakiola/calendula/issues/146
 [#267]: https://codeberg.org/jlmakiola/calendula/issues/267
+[#239]: https://codeberg.org/jlmakiola/calendula/issues/239
diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index d0303be..80e35f6 100644
--- a/app/build.gradle.kts
+++ b/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 = 22000
-        versionName = "2.20.0"
+        versionCode = 22001
+        versionName = "2.20.1"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
     }
diff --git a/app/src/main/java/de/jeanlucmakiola/calendula/domain/CalendarVisibilityPlan.kt b/app/src/main/java/de/jeanlucmakiola/calendula/domain/CalendarVisibilityPlan.kt
index f9b84dc..6ccb621 100644
--- a/app/src/main/java/de/jeanlucmakiola/calendula/domain/CalendarVisibilityPlan.kt
+++ b/app/src/main/java/de/jeanlucmakiola/calendula/domain/CalendarVisibilityPlan.kt
@@ -46,3 +46,19 @@ fun hasSystemHiddenCalendars(
     calendars: List<CalendarSource>,
     pendingDisabledIds: Set<Long>,
 ): Boolean = calendars.any { !it.isVisibleInSystem && it.id !in pendingDisabledIds }
+
+/**
+ * The failure a calendar list implies, or null when there is something to show.
+ * Distinguishes "the device has no calendars" from "every one of them is
+ * switched off" (#239) — both leave the grid empty, but only the second is
+ * fixed from Settings → Calendars.
+ *
+ * The filter sheet's own hidden set is deliberately not folded in: emptying it
+ * is a deliberate act taken moments earlier, in a sheet that is still one tap
+ * away.
+ */
+fun calendarListFailure(calendars: List<CalendarSource>): FailureReason? = when {
+    calendars.isEmpty() -> FailureReason.NoCalendarsConfigured
+    calendars.none { it.isVisibleInSystem } -> FailureReason.AllCalendarsHidden
+    else -> null
+}
diff --git a/app/src/main/java/de/jeanlucmakiola/calendula/domain/Models.kt b/app/src/main/java/de/jeanlucmakiola/calendula/domain/Models.kt
index fa3fad0..7fba181 100644
--- a/app/src/main/java/de/jeanlucmakiola/calendula/domain/Models.kt
+++ b/app/src/main/java/de/jeanlucmakiola/calendula/domain/Models.kt
@@ -252,6 +252,7 @@ enum class RecurringWriteScope {
 enum class FailureReason {
     PermissionRevoked,
     NoCalendarsConfigured,
+    AllCalendarsHidden,
     ProviderUnavailable,
     EventNotFound,
     Unknown,
diff --git a/app/src/main/java/de/jeanlucmakiola/calendula/ui/CalendarHost.kt b/app/src/main/java/de/jeanlucmakiola/calendula/ui/CalendarHost.kt
index 2ef93d5..0141d94 100644
--- a/app/src/main/java/de/jeanlucmakiola/calendula/ui/CalendarHost.kt
+++ b/app/src/main/java/de/jeanlucmakiola/calendula/ui/CalendarHost.kt
@@ -31,6 +31,7 @@ import de.jeanlucmakiola.calendula.ui.common.CalendarView
 import de.jeanlucmakiola.calendula.ui.common.EventMoveHost
 import de.jeanlucmakiola.calendula.ui.common.EventMoveScope
 import de.jeanlucmakiola.calendula.ui.common.LocalEventMove
+import de.jeanlucmakiola.calendula.ui.common.LocalManageCalendars
 import de.jeanlucmakiola.calendula.ui.common.RescheduleViewModel
 import de.jeanlucmakiola.calendula.ui.common.drillToDay
 import de.jeanlucmakiola.calendula.ui.common.rememberCalendarSlideSpec
@@ -344,7 +345,12 @@ fun CalendarHost(
         // navigation, so it fades through rather than sliding — paging *within* a
         // view keeps the directional slide. AnimatedContent keyed on the view type.
         val viewSwitch = fadeThrough()
-        CompositionLocalProvider(LocalEventMove provides moveScope) {
+        CompositionLocalProvider(
+            LocalEventMove provides moveScope,
+            // The failure state's way out when every calendar is switched off
+            // (#239); nothing else in the calendar surfaces navigates here.
+            LocalManageCalendars provides { showCalendars = true },
+        ) {
         AnimatedContent(
             targetState = view,
             transitionSpec = { viewSwitch },
diff --git a/app/src/main/java/de/jeanlucmakiola/calendula/ui/agenda/AgendaViewModel.kt b/app/src/main/java/de/jeanlucmakiola/calendula/ui/agenda/AgendaViewModel.kt
index e288003..e894f40 100644
--- a/app/src/main/java/de/jeanlucmakiola/calendula/ui/agenda/AgendaViewModel.kt
+++ b/app/src/main/java/de/jeanlucmakiola/calendula/ui/agenda/AgendaViewModel.kt
@@ -11,6 +11,7 @@ import de.jeanlucmakiola.calendula.data.prefs.firstDayOfWeek
 import de.jeanlucmakiola.calendula.domain.CalendarSource
 import de.jeanlucmakiola.calendula.domain.EventInstance
 import de.jeanlucmakiola.calendula.domain.FailureReason
+import de.jeanlucmakiola.calendula.domain.calendarListFailure
 import kotlinx.coroutines.CoroutineDispatcher
 import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.flow.MutableStateFlow
@@ -156,9 +157,7 @@ class AgendaViewModel @Inject constructor(
         calendars: List<CalendarSource>,
         instances: List<EventInstance>,
     ): AgendaUiState {
-        if (calendars.isEmpty()) {
-            return AgendaUiState.Failure(FailureReason.NoCalendarsConfigured)
-        }
+        calendarListFailure(calendars)?.let { return AgendaUiState.Failure(it) }
         val anchor = params.anchor
         val rangeEnd = anchor.plus(
             params.range.dayCount(anchor, params.weekStart) - 1,
diff --git a/app/src/main/java/de/jeanlucmakiola/calendula/ui/common/CalendarFailure.kt b/app/src/main/java/de/jeanlucmakiola/calendula/ui/common/CalendarFailure.kt
index 09a761e..8eee97a 100644
--- a/app/src/main/java/de/jeanlucmakiola/calendula/ui/common/CalendarFailure.kt
+++ b/app/src/main/java/de/jeanlucmakiola/calendula/ui/common/CalendarFailure.kt
@@ -1,5 +1,9 @@
 package de.jeanlucmakiola.calendula.ui.common
 
+import android.content.Context
+import android.content.Intent
+import android.provider.CalendarContract
+import android.provider.Settings
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Spacer
@@ -10,8 +14,10 @@ import androidx.compose.material3.FilledTonalButton
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.compositionLocalOf
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
@@ -24,18 +30,29 @@ import de.jeanlucmakiola.calendula.domain.FailureReason
  */
 @Composable
 fun CalendarFailure(reason: FailureReason, onRetry: () -> Unit) {
+    val context = LocalContext.current
+    val manageCalendars = LocalManageCalendars.current
     val titleRes = when (reason) {
         FailureReason.PermissionRevoked -> R.string.state_failure_permission
         FailureReason.NoCalendarsConfigured -> R.string.state_failure_no_calendars
+        FailureReason.AllCalendarsHidden -> R.string.state_failure_all_hidden
         FailureReason.ProviderUnavailable -> R.string.state_failure_provider
         FailureReason.Unknown,
         FailureReason.EventNotFound -> R.string.state_failure_unknown
     }
     val actionRes = when (reason) {
         FailureReason.NoCalendarsConfigured -> R.string.state_failure_no_calendars_action
+        FailureReason.AllCalendarsHidden -> R.string.state_failure_all_hidden_action
         FailureReason.PermissionRevoked -> R.string.state_failure_permission_action
         else -> R.string.state_retry
     }
+    val onAction: () -> Unit = when (reason) {
+        FailureReason.NoCalendarsConfigured -> {
+            { context.startCalendarSetup() }
+        }
+        FailureReason.AllCalendarsHidden -> manageCalendars ?: onRetry
+        else -> onRetry
+    }
     Column(
         modifier = Modifier
             .fillMaxSize()
@@ -49,8 +66,30 @@ fun CalendarFailure(reason: FailureReason, onRetry: () -> Unit) {
             textAlign = TextAlign.Center,
         )
         Spacer(Modifier.height(24.dp))
-        FilledTonalButton(onClick = onRetry) {
+        FilledTonalButton(onClick = onAction) {
             Text(stringResource(actionRes))
         }
     }
 }
+
+/**
+ * Opens Settings → Calendars, the only screen that can switch a calendar back
+ * on. Null outside the calendar host — screens without it never raise the
+ * reason that needs it, and fall back to their own retry.
+ */
+val LocalManageCalendars = compositionLocalOf<(() -> Unit)?> { null }
+
+/**
+ * Open the system screen for putting a calendar on the device: the account
+ * chooser filtered to calendar providers, falling back to account settings
+ * where no chooser resolves. Both are system components, so nothing here needs
+ * a `<queries>` entry.
+ */
+private fun Context.startCalendarSetup() {
+    val intents = listOf(
+        Intent(Settings.ACTION_ADD_ACCOUNT)
+            .putExtra(Settings.EXTRA_AUTHORITIES, arrayOf(CalendarContract.AUTHORITY)),
+        Intent(Settings.ACTION_SYNC_SETTINGS),
+    )
+    intents.firstOrNull { runCatching { startActivity(it) }.isSuccess }
+}
diff --git a/app/src/main/java/de/jeanlucmakiola/calendula/ui/day/DayViewModel.kt b/app/src/main/java/de/jeanlucmakiola/calendula/ui/day/DayViewModel.kt
index 961d0c3..4146aee 100644
--- a/app/src/main/java/de/jeanlucmakiola/calendula/ui/day/DayViewModel.kt
+++ b/app/src/main/java/de/jeanlucmakiola/calendula/ui/day/DayViewModel.kt
@@ -8,6 +8,7 @@ import de.jeanlucmakiola.calendula.data.di.IoDispatcher
 import de.jeanlucmakiola.calendula.domain.CalendarSource
 import de.jeanlucmakiola.calendula.domain.EventInstance
 import de.jeanlucmakiola.calendula.domain.FailureReason
+import de.jeanlucmakiola.calendula.domain.calendarListFailure
 import de.jeanlucmakiola.calendula.ui.week.layoutAllDay
 import de.jeanlucmakiola.calendula.ui.week.layoutDay
 import kotlinx.coroutines.CoroutineDispatcher
@@ -88,9 +89,7 @@ class DayViewModel @Inject constructor(
         calendars: List<CalendarSource>,
         instances: List<EventInstance>,
     ): DayUiState {
-        if (calendars.isEmpty()) {
-            return DayUiState.Failure(FailureReason.NoCalendarsConfigured)
-        }
+        calendarListFailure(calendars)?.let { return DayUiState.Failure(it) }
         val days = listOf(day)
         val allDay = instances.filter { it.isAllDay }
         val timed = instances.filterNot { it.isAllDay }
diff --git a/app/src/main/java/de/jeanlucmakiola/calendula/ui/filter/CalendarFilterList.kt b/app/src/main/java/de/jeanlucmakiola/calendula/ui/filter/CalendarFilterList.kt
index a7699d7..7bf8480 100644
--- a/app/src/main/java/de/jeanlucmakiola/calendula/ui/filter/CalendarFilterList.kt
+++ b/app/src/main/java/de/jeanlucmakiola/calendula/ui/filter/CalendarFilterList.kt
@@ -125,6 +125,7 @@ private fun FilterLoading(modifier: Modifier = Modifier) {
 private fun FilterMessage(reason: FailureReason, modifier: Modifier = Modifier) {
     val msg = when (reason) {
         FailureReason.NoCalendarsConfigured -> R.string.state_failure_no_calendars
+        FailureReason.AllCalendarsHidden -> R.string.state_failure_all_hidden
         FailureReason.PermissionRevoked -> R.string.state_failure_permission
         else -> R.string.state_failure_provider
     }
diff --git a/app/src/main/java/de/jeanlucmakiola/calendula/ui/filter/FilterViewModel.kt b/app/src/main/java/de/jeanlucmakiola/calendula/ui/filter/FilterViewModel.kt
index 86d7924..218c364 100644
--- a/app/src/main/java/de/jeanlucmakiola/calendula/ui/filter/FilterViewModel.kt
+++ b/app/src/main/java/de/jeanlucmakiola/calendula/ui/filter/FilterViewModel.kt
@@ -8,6 +8,7 @@ import de.jeanlucmakiola.calendula.data.di.IoDispatcher
 import de.jeanlucmakiola.calendula.data.prefs.CalendarPrefs
 import de.jeanlucmakiola.calendula.domain.CalendarSource
 import de.jeanlucmakiola.calendula.domain.FailureReason
+import de.jeanlucmakiola.calendula.domain.calendarListFailure
 import de.jeanlucmakiola.calendula.ui.common.groupByAccount
 import kotlinx.coroutines.CoroutineDispatcher
 import kotlinx.coroutines.flow.SharingStarted
@@ -35,8 +36,9 @@ class FilterViewModel @Inject constructor(
             // Calendars switched off device-wide don't belong in the drawer's
             // hide/show list; they live only in Settings → Calendars.
             val enabled = calendars.filter { it.isVisibleInSystem }
-            if (enabled.isEmpty()) {
-                FilterUiState.Failure(FailureReason.NoCalendarsConfigured)
+            val failure = calendarListFailure(calendars)
+            if (failure != null) {
+                FilterUiState.Failure(failure)
             } else {
                 FilterUiState.Success(groupCalendarsForFilter(enabled, hidden))
             }
diff --git a/app/src/main/java/de/jeanlucmakiola/calendula/ui/month/MonthViewModel.kt b/app/src/main/java/de/jeanlucmakiola/calendula/ui/month/MonthViewModel.kt
index a7a70a9..9123823 100644
--- a/app/src/main/java/de/jeanlucmakiola/calendula/ui/month/MonthViewModel.kt
+++ b/app/src/main/java/de/jeanlucmakiola/calendula/ui/month/MonthViewModel.kt
@@ -10,6 +10,7 @@ import de.jeanlucmakiola.calendula.data.prefs.firstDayOfWeek
 import de.jeanlucmakiola.calendula.domain.CalendarSource
 import de.jeanlucmakiola.calendula.domain.EventInstance
 import de.jeanlucmakiola.calendula.domain.FailureReason
+import de.jeanlucmakiola.calendula.domain.calendarListFailure
 import de.jeanlucmakiola.calendula.domain.isDeclined
 import de.jeanlucmakiola.calendula.ui.week.coversDay
 import de.jeanlucmakiola.calendula.ui.week.layoutAllDay
@@ -208,9 +209,7 @@ class MonthViewModel @Inject constructor(
         calendars: List<CalendarSource>,
         instances: List<EventInstance>,
     ): ContinuousMonthUiState {
-        if (calendars.isEmpty()) {
-            return ContinuousMonthUiState.Failure(FailureReason.NoCalendarsConfigured)
-        }
+        calendarListFailure(calendars)?.let { return ContinuousMonthUiState.Failure(it) }
         // Bucketed once for the whole window: a row then takes the handful of
         // events on its seven days instead of re-scanning a year of them.
         val byDay = DayIndex(instances, zone)
@@ -314,9 +313,7 @@ class MonthViewModel @Inject constructor(
         calendars: List<CalendarSource>,
         instances: List<EventInstance>,
     ): MonthUiState {
-        if (calendars.isEmpty()) {
-            return MonthUiState.Failure(FailureReason.NoCalendarsConfigured)
-        }
+        calendarListFailure(calendars)?.let { return MonthUiState.Failure(it) }
         val weeks = layoutMonthWeeks(ym, weekStart, instances, zone)
         return MonthUiState.Success(
             month = ym,
diff --git a/app/src/main/java/de/jeanlucmakiola/calendula/ui/week/WeekViewModel.kt b/app/src/main/java/de/jeanlucmakiola/calendula/ui/week/WeekViewModel.kt
index 26ca439..edaed06 100644
--- a/app/src/main/java/de/jeanlucmakiola/calendula/ui/week/WeekViewModel.kt
+++ b/app/src/main/java/de/jeanlucmakiola/calendula/ui/week/WeekViewModel.kt
@@ -10,6 +10,7 @@ import de.jeanlucmakiola.calendula.data.prefs.resolveFirstDay
 import de.jeanlucmakiola.calendula.domain.CalendarSource
 import de.jeanlucmakiola.calendula.domain.EventInstance
 import de.jeanlucmakiola.calendula.domain.FailureReason
+import de.jeanlucmakiola.calendula.domain.calendarListFailure
 import de.jeanlucmakiola.calendula.domain.isDeclined
 import kotlinx.coroutines.CoroutineDispatcher
 import kotlinx.coroutines.ExperimentalCoroutinesApi
@@ -126,9 +127,7 @@ class WeekViewModel @Inject constructor(
         calendars: List<CalendarSource>,
         instances: List<EventInstance>,
     ): WeekUiState {
-        if (calendars.isEmpty()) {
-            return WeekUiState.Failure(FailureReason.NoCalendarsConfigured)
-        }
+        calendarListFailure(calendars)?.let { return WeekUiState.Failure(it) }
         val days = (0 until 7).map { start.plus(it, DateTimeUnit.DAY) }
         val allDay = instances.filter { it.isAllDay }
         val timed = instances.filterNot { it.isAllDay }
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 982ee2e..40e9971 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -14,6 +14,8 @@
     <string name="state_failure_permission_action">Grant access</string>
     <string name="state_failure_no_calendars">No calendars configured.</string>
     <string name="state_failure_no_calendars_action">Open system calendar settings</string>
+    <string name="state_failure_all_hidden">All your calendars are switched off.</string>
+    <string name="state_failure_all_hidden_action">Manage calendars</string>
     <string name="state_failure_provider">Could not read the calendar.</string>
 
     <!-- Long-press a field to copy it (#195) -->
diff --git a/app/src/test/java/de/jeanlucmakiola/calendula/domain/CalendarVisibilityPlanTest.kt b/app/src/test/java/de/jeanlucmakiola/calendula/domain/CalendarVisibilityPlanTest.kt
index 8f01442..fa53d15 100644
--- a/app/src/test/java/de/jeanlucmakiola/calendula/domain/CalendarVisibilityPlanTest.kt
+++ b/app/src/test/java/de/jeanlucmakiola/calendula/domain/CalendarVisibilityPlanTest.kt
@@ -121,4 +121,24 @@ class CalendarVisibilityPlanTest {
             ),
         ).isTrue()
     }
+
+    @Test
+    fun `no calendars on the device is its own failure`() {
+        assertThat(calendarListFailure(emptyList()))
+            .isEqualTo(FailureReason.NoCalendarsConfigured)
+    }
+
+    @Test
+    fun `calendars that are all switched off read as hidden, not missing`() {
+        // The remedy differs: one needs a calendar made, the other needs one
+        // switched back on (#239).
+        assertThat(calendarListFailure(listOf(cal(1L, visible = false), cal(2L, visible = false))))
+            .isEqualTo(FailureReason.AllCalendarsHidden)
+    }
+
+    @Test
+    fun `one visible calendar is enough to show something`() {
+        assertThat(calendarListFailure(listOf(cal(1L, visible = false), cal(2L, visible = true))))
+            .isNull()
+    }
 }
diff --git a/app/src/test/java/de/jeanlucmakiola/calendula/domain/ModelsTest.kt b/app/src/test/java/de/jeanlucmakiola/calendula/domain/ModelsTest.kt
index 2209173..324acf6 100644
--- a/app/src/test/java/de/jeanlucmakiola/calendula/domain/ModelsTest.kt
+++ b/app/src/test/java/de/jeanlucmakiola/calendula/domain/ModelsTest.kt
@@ -36,11 +36,12 @@ class ModelsTest {
     }
 
     @Test
-    fun `FailureReason enum has all five variants`() {
+    fun `FailureReason enum has all six variants`() {
         assertThat(FailureReason.values().toSet()).isEqualTo(
             setOf(
                 FailureReason.PermissionRevoked,
                 FailureReason.NoCalendarsConfigured,
+                FailureReason.AllCalendarsHidden,
                 FailureReason.ProviderUnavailable,
                 FailureReason.EventNotFound,
                 FailureReason.Unknown,
diff --git a/fastlane/metadata/android/en-US/changelogs/22001.txt b/fastlane/metadata/android/en-US/changelogs/22001.txt
new file mode 100644
index 0000000..4e9195c
--- /dev/null
+++ b/fastlane/metadata/android/en-US/changelogs/22001.txt
@@ -0,0 +1,11 @@
+New
+• Long-press an event's title, location or description to copy.
+• Settings → About lists the open-source projects we ship.
+
+Changed
+• Week & day: each hour sits in its own cell, not a line.
+• Unanswered invitations are drawn as outlines.
+
+Fixed
+• "No calendars configured" now really opens the system calendar setup.
+• When every calendar is switched off, the app says so instead of a blank month.