diff --git a/src/components/pages/post-meetup/modals/date-picker-modal/calendar/index.tsx b/src/components/pages/post-meetup/modals/date-picker-modal/calendar/index.tsx
index a6842b38..9017032b 100644
--- a/src/components/pages/post-meetup/modals/date-picker-modal/calendar/index.tsx
+++ b/src/components/pages/post-meetup/modals/date-picker-modal/calendar/index.tsx
@@ -33,7 +33,7 @@ export const Calendar = ({ currentTab, dateFieldValue, updateDateField }: Props)
     const { newHours, newMinutes } = selectedTimeTo24Hour(selectedTime);
 
     selectedDates[0].setHours(newHours, newMinutes, 0, 0);
-    updateDateField(selectedDates[0].toString());
+    updateDateField(selectedDates[0].toISOString());
   }, [selectedDates, selectedTime]);
 
   return (