diff --git a/src/calendar/Calendar.tsx b/src/calendar/Calendar.tsx
index 5c715260f9..8b9ebdaf2d 100644
--- a/src/calendar/Calendar.tsx
+++ b/src/calendar/Calendar.tsx
@@ -67,7 +67,7 @@ const Calendar = forwardRef<CalendarMethods, CalendarProps>((props, ref) => {
     style,
     mode: modeFromProps,
     value: valueFromProps,
-    firstDayOfWeek,
+    firstDayOfWeek = 1,
     format,
     range,
     head,