diff --git a/resources/js/lib/changelog.ts b/resources/js/lib/changelog.ts
index 4aa6d9636..3be6b60e7 100644
--- a/resources/js/lib/changelog.ts
+++ b/resources/js/lib/changelog.ts
@@ -43,11 +43,13 @@ export function changelogDays(
     timeZone: string,
 ): ChangelogDay[] {
     const days: ChangelogDay[] = [];
+    const calendar = new Intl.DateTimeFormat('en-CA', { timeZone });
 
     for (const commit of commits) {
-        const date = new Date(commit.committed_at).toLocaleDateString('en-CA', {
-            timeZone,
-        });
+        const parsed = new Date(commit.committed_at);
+        const date = Number.isNaN(parsed.getTime())
+            ? 'Invalid Date'
+            : calendar.format(parsed);
         let day = days.at(-1);
 
         if (day?.date !== date) {
diff --git a/tests/Unit/Changelog.test.ts b/tests/Unit/Changelog.test.ts
index 23d33f856..448f4b2b1 100644
--- a/tests/Unit/Changelog.test.ts
+++ b/tests/Unit/Changelog.test.ts
@@ -94,3 +94,12 @@ void test('names the day relative to today in the reader’s time zone', () => {
     assert.deepEqual(changelogDayHeading('2026-10-14', 'Europe/Budapest', now), { title: 'Wednesday', date: 'Oct 14' });
     assert.deepEqual(changelogDayHeading('2025-12-31', 'Europe/Budapest', now), { title: 'Wednesday', date: 'Dec 31, 2025' });
 });
+
+void test('keeps grouping when a commit has an invalid timestamp', () => {
+    const days = changelogDays(
+        [commit(1, 'not-a-date', 'alice'), commit(2, '2026-10-18T03:30:00Z', 'bob')],
+        'Europe/Budapest',
+    );
+
+    assert.deepEqual(days.map((day) => day.date), ['Invalid Date', '2026-10-18']);
+});