diff --git a/web/src/pages/Booking.tsx b/web/src/pages/Booking.tsx
index a76e409..99cedc5 100644
--- a/web/src/pages/Booking.tsx
+++ b/web/src/pages/Booking.tsx
@@ -66,7 +66,10 @@ export default function Booking() {
       .filter(Boolean);
 
     const today = new Date();
-    const todayStr = today.toISOString().split('T')[0];
+    const year = today.getFullYear();
+    const month = String(today.getMonth() + 1).padStart(2, '0');
+    const day = String(today.getDate()).padStart(2, '0');
+    const todayStr = `${year}-${month}-${day}`;
     const isToday = date === todayStr;
     const currentHour = today.getHours();
     const currentMinute = today.getMinutes();