diff --git a/src/hooks/useAnimation.ts b/src/hooks/useAnimation.ts
index d444363..5cd30b7 100644
--- a/src/hooks/useAnimation.ts
+++ b/src/hooks/useAnimation.ts
@@ -47,7 +47,7 @@ function buildFrames(periodDays: number): TimeFrame[] {
     const from = cursor;
     const to = Math.min(cursor + HALF_WEEK, now);
     frames.push({
-      label: `${fmt(from, { day: 'numeric', month: 'short' })} – ${fmt(to - 1, { day: 'numeric', month: 'short' })}`,
+      label: `${fmt(from, { weekday: 'short', day: 'numeric', month: 'short' })} – ${fmt(to - 1, { weekday: 'short', day: 'numeric', month: 'short' })}`,
       from,
       to,
     });