diff --git a/functions/api/events-team/events/[id]/forgotten.ts b/functions/api/events-team/events/[id]/forgotten.ts
new file mode 100644
index 0000000..48adcda
--- /dev/null
+++ b/functions/api/events-team/events/[id]/forgotten.ts
@@ -0,0 +1,13 @@
+export async function onRequestPost(context: RequestContext) {
+  const id = context.params.id as string;
+
+  await context.env.D1.prepare(
+    "UPDATE events SET performed_at = 0 WHERE id = ?;",
+  )
+    .bind(id)
+    .run();
+
+  return new Response(null, {
+    status: 204,
+  });
+}