diff --git a/src/lib/__tests__/calendar-a11y.test.ts b/src/lib/__tests__/calendar-a11y.test.ts
index 23f25d68..27e6e71d 100644
--- a/src/lib/__tests__/calendar-a11y.test.ts
+++ b/src/lib/__tests__/calendar-a11y.test.ts
@@ -14,6 +14,8 @@ import {
   participantRemoveAccessibilityLabel,
 } from '../calendar-a11y';
 import { useSettingsStore } from '../../stores/settings-store';
+import { gregorianCalendar, jalaliCalendar } from '../calendar-system';
+import { displayNow } from '../calendar-timezone';
 
 const t = (_key: string, fallback?: string, params?: Record<string, string | number>) =>
   formatMessage(fallback ?? '', params, 'en');
@@ -54,7 +56,28 @@ describe('eventAccessibilityLabel', () => {
 
 describe('header and chip buttons', () => {
   it('names the month button by the month it shows, not "Click to change month"', () => {
-    expect(monthButtonAccessibilityLabel('October 2026', t)).toBe('October 2026, change month');
+    expect(monthButtonAccessibilityLabel(new Date(2026, 9, 15), gregorianCalendar, enUS, t)).toBe('October 2026, change month');
+  });
+
+  it('reads the year also in the current year, where the header leaves it out', () => {
+    const now = displayNow();
+    const month = new Intl.DateTimeFormat('en-US', { month: 'long' }).format(now);
+    expect(monthButtonAccessibilityLabel(now, gregorianCalendar, enUS, t)).toBe(`${month} ${now.getFullYear()}, change month`);
+    expect(monthButtonAccessibilityLabel(now, jalaliCalendar, enUS, t)).toMatch(/ \d{4}, change month$/);
+  });
+
+  it('has "change month" translated in every app overlay', async () => {
+    const fs = await import('node:fs');
+    const path = await import('node:path');
+    const dir = path.resolve(__dirname, '../../../locales/rn');
+    const files = fs.readdirSync(dir).filter((f) => f.endsWith('.json'));
+    expect(files.length).toBeGreaterThanOrEqual(29);
+    for (const file of files) {
+      const overlay = JSON.parse(fs.readFileSync(path.join(dir, file), 'utf8'));
+      const value = overlay.calendar?.change_month_named as string | undefined;
+      expect(value, file).toContain('{month}');
+      if (file !== 'en.json') expect(value, file).not.toContain('change month');
+    }
   });
 
   it('names the cross on a participant chip by the person it removes', () => {
diff --git a/src/lib/calendar-a11y.ts b/src/lib/calendar-a11y.ts
index 97fcbd6c..c5a6d37e 100644
--- a/src/lib/calendar-a11y.ts
+++ b/src/lib/calendar-a11y.ts
@@ -3,7 +3,7 @@ import type { Locale } from 'date-fns';
 import type { Calendar, CalendarEvent } from '../api/types';
 import { getEventDisplayEndDate, getEventStartDate, getPrimaryCalendarId, timePattern } from './calendar-utils';
 import { isDeclinedByUser } from './calendar-participants';
-import { formatCalendarDay } from './calendar-system';
+import { formatCalendarDay, monthTitle, type CalendarSystem } from './calendar-system';
 
 type Translate = (key: string, fallback?: string, params?: Record<string, string | number>) => string;
 
@@ -14,10 +14,11 @@ type Translate = (key: string, fallback?: string, params?: Record<string, string
 /**
  * "October 2026, change month" for the header button that opens the month
  * panel: the month shown first, then what the button does. Not the
- * webmail's "Click to change month" (calendar.mini_calendar_change).
+ * webmail's "Click to change month" (calendar.mini_calendar_change). The
+ * year is always read, also where the header leaves it out (this year).
  */
-export function monthButtonAccessibilityLabel(title: string, t: Translate): string {
-  return t('calendar.change_month_named', '{month}, change month', { month: title });
+export function monthButtonAccessibilityLabel(date: Date, system: CalendarSystem, locale: Locale, t: Translate): string {
+  return t('calendar.change_month_named', '{month}, change month', { month: monthTitle(date, system, locale, true) });
 }
 
 /** "Remove Ana" for the cross on an invited participant's chip (webmail recipient_remove_named). */
diff --git a/src/screens/CalendarScreen.tsx b/src/screens/CalendarScreen.tsx
index 7ba8289e..78dd7b66 100644
--- a/src/screens/CalendarScreen.tsx
+++ b/src/screens/CalendarScreen.tsx
@@ -1037,7 +1037,7 @@ export default function CalendarScreen() {
           style={styles.titleBtn}
           hitSlop={6}
           accessibilityRole="button"
-          accessibilityLabel={monthButtonAccessibilityLabel(headerTitle(titleDate, locale, system), t)}
+          accessibilityLabel={monthButtonAccessibilityLabel(titleDate, system, locale, t)}
           accessibilityState={{ expanded: monthPanelOpen }}
         >
           <Text style={styles.headerTitle} numberOfLines={1}>