diff --git a/frontend/src/lib/shared/dashboard/ReaderRecentDocs.svelte b/frontend/src/lib/shared/dashboard/ReaderRecentDocs.svelte
index 3fd37db4..4052fc8a 100644
--- a/frontend/src/lib/shared/dashboard/ReaderRecentDocs.svelte
+++ b/frontend/src/lib/shared/dashboard/ReaderRecentDocs.svelte
@@ -12,7 +12,7 @@ interface Props {
 const { documents }: Props = $props();
 
 function isNew(doc: Document): boolean {
-	return doc.createdAt === doc.updatedAt;
+	return new Date(doc.createdAt).getTime() === new Date(doc.updatedAt).getTime();
 }
 </script>
 
diff --git a/frontend/src/lib/shared/dashboard/ReaderRecentDocs.svelte.spec.ts b/frontend/src/lib/shared/dashboard/ReaderRecentDocs.svelte.spec.ts
index 6d0f45f7..502a10d9 100644
--- a/frontend/src/lib/shared/dashboard/ReaderRecentDocs.svelte.spec.ts
+++ b/frontend/src/lib/shared/dashboard/ReaderRecentDocs.svelte.spec.ts
@@ -55,6 +55,18 @@ describe('ReaderRecentDocs', () => {
 		await expect.element(badge).not.toBeInTheDocument();
 	});
 
+	it('shows "Neu" badge when createdAt and updatedAt represent the same instant in different ISO formats', async () => {
+		const sameInstantDoc: Document = {
+			...baseDoc,
+			id: 'doc-same-instant',
+			createdAt: '2025-01-01T12:00:00Z',
+			updatedAt: '2025-01-01T12:00:00.000Z'
+		};
+		render(ReaderRecentDocs, { documents: [sameInstantDoc] });
+		const badge = page.getByText(/^Neu$/i);
+		await expect.element(badge).toBeInTheDocument();
+	});
+
 	it('renders sender link when sender is present', async () => {
 		const docWithSender: Document = {
 			...baseDoc,