diff --git a/web/e2e/smoke.spec.js b/web/e2e/smoke.spec.js
index a4f1b6d..b82d005 100644
--- a/web/e2e/smoke.spec.js
+++ b/web/e2e/smoke.spec.js
@@ -1072,7 +1072,9 @@ test('kalenderen viser Googles begivenheder over egne opgaver, og kun opgaven ka
 				read_only: true,
 				has_client: true,
 				redirect_uri: 'http://localhost/oauth/calendar/callback',
-				calendars: []
+				calendars: [
+					{ id: 'c1', remote_id: 'fam', name: 'Arbejde', colour: '#0b8043', shown: true }
+				]
 			}
 		})
 	);
@@ -1109,6 +1111,12 @@ test('kalenderen viser Googles begivenheder over egne opgaver, og kun opgaven ka
 	}
 	await expect(cell, `uge-visningen nåede aldrig frem til ${day}`).toBeVisible();
 
+	// Connected, with a calendar ticked — so neither of the two "there is nothing
+	// here" notices belongs on the screen. They exist so an empty grid is never
+	// unexplained, and an explanation for a state you are not in is noise.
+	await expect(page.getByText('Ingen kalender er forbundet endnu.')).toBeHidden();
+	await expect(page.getByText('Ingen af kontoens kalendere er valgt endnu.')).toBeHidden();
+
 	// Both kinds are in the same cell, which is the whole point of the view.
 	const event = cell.locator('.event').filter({ hasText: 'Bestyrelsesmøde' });
 	const allDay = cell.locator('.event').filter({ hasText: 'Feriedag' });
diff --git a/web/src/lib/locales/da.js b/web/src/lib/locales/da.js
index 69909b5..06035aa 100644
--- a/web/src/lib/locales/da.js
+++ b/web/src/lib/locales/da.js
@@ -630,6 +630,7 @@ export const da = {
 	'cal.notConnected':
 		'Ingen kalender er forbundet endnu. Det gøres under Indstillinger → Integrationer.',
 	'cal.settings': 'Indstillinger',
+	'cal.noneChosen': 'Ingen af kontoens kalendere er valgt endnu.',
 	'cal.allDay': 'Hele dagen',
 	'cal.openInGoogle': 'Åbn i Google Kalender',
 	'cal.beyondWindow':
diff --git a/web/src/lib/locales/en.js b/web/src/lib/locales/en.js
index e3c6c08..0e8709f 100644
--- a/web/src/lib/locales/en.js
+++ b/web/src/lib/locales/en.js
@@ -623,6 +623,7 @@ export const en = {
 	'cal.title': 'Calendar',
 	'cal.notConnected': 'No calendar is connected yet. That is done under Settings → Integrations.',
 	'cal.settings': 'Settings',
+	'cal.noneChosen': 'None of the account’s calendars are chosen yet.',
 	'cal.allDay': 'All day',
 	'cal.openInGoogle': 'Open in Google Calendar',
 	'cal.beyondWindow':
diff --git a/web/src/routes/indstillinger/integrationer/+page.svelte b/web/src/routes/indstillinger/integrationer/+page.svelte
index f23158c..5a57c04 100644
--- a/web/src/routes/indstillinger/integrationer/+page.svelte
+++ b/web/src/routes/indstillinger/integrationer/+page.svelte
@@ -197,8 +197,19 @@
 		calendarsSaved = false;
 		try {
 			await api.setCalendars(shownCalendars);
-			await loadCalendar();
 			calendarsSaved = true;
+			// And fetch, without being asked again.
+			//
+			// Ticking a calendar is somebody saying "show me this one". Saving the
+			// choice and leaving the grid empty until the sweep comes round a quarter
+			// of an hour later is a calendar that says a fortnight is clear — and the
+			// person is on this page, watching, with the button under their hand.
+			// Also what refreshes the panel: syncCalendarNow reloads it when it is done.
+			if (shownCalendars.length) {
+				await syncCalendarNow();
+			} else {
+				await loadCalendar();
+			}
 		} catch (e) {
 			app.toast(humanMessage(e));
 		} finally {
diff --git a/web/src/routes/kalender/+page.svelte b/web/src/routes/kalender/+page.svelte
index 81e2c84..2d55f0a 100644
--- a/web/src/routes/kalender/+page.svelte
+++ b/web/src/routes/kalender/+page.svelte
@@ -22,13 +22,18 @@
 	/** Null until the first answer, so nothing flashes before it is known. */
 	let window_ = $state(null);
 	let connected = $state(null);
+	/** Whether any calendar in the connected account is ticked. */
+	let anyShown = $state(false);
 	/** The dates the grid is showing, so the notice below can compare against them. */
 	let showing = $state(null);
 
 	$effect(() => {
 		api
 			.getCalendar()
-			.then((status) => (connected = status.connected))
+			.then((status) => {
+				connected = status.connected;
+				anyShown = (status.calendars ?? []).some((c) => c.shown);
+			})
 			.catch(() => {
 				// A calendar that could not be asked about is not a reason to withhold
 				// the grid: the tasks in it are verdande's own and do not depend on
@@ -101,6 +106,16 @@
 		</p>
 	{/if}
 
+	<!-- Connected, and nothing ticked. Worth its own sentence rather than an empty
+	     grid: "no calendar is chosen" and "nothing is booked" look identical, and
+	     only one of them is something to do about. -->
+	{#if connected && !anyShown}
+		<p class="hint">
+			{t('cal.noneChosen')}
+			<a href="/indstillinger/integrationer">{t('cal.settings')}</a>
+		</p>
+	{/if}
+
 	{#if beyond}
 		<p class="hint">{t('cal.beyondWindow', { from: window_.from, to: window_.to })}</p>
 	{/if}