diff --git a/app/routes/book-event.tsx b/app/routes/book-event.tsx
index 8dc8c06..458cb6e 100644
--- a/app/routes/book-event.tsx
+++ b/app/routes/book-event.tsx
@@ -47,10 +47,10 @@ export default function () {
   const [submitSuccess, setSubmitSuccess] = useState(false);
 
   useEffect(() => {
-    currentDate.setUTCDate(0);
     setDatePickerMin(
-      `${currentYear}-${currentMonth.toString().padStart(2, "0")}-01`,
+      `${currentYear}-${currentMonth.toString().padStart(2, "0")}-${currentDate.getUTCDate().toString().padStart(2, "0")}`,
     );
+    currentDate.setUTCDate(0);
     setDatePickerMax(
       `${currentYear}-${currentMonth.toString().padStart(2, "0")}-${new Date(currentYear, currentMonth, 0).getUTCDate()}`,
     );