diff --git a/src/frontend/src/pages/CalendarPage/Components/EventModal.tsx b/src/frontend/src/pages/CalendarPage/Components/EventModal.tsx
index b84d5360ad..c60f168b35 100644
--- a/src/frontend/src/pages/CalendarPage/Components/EventModal.tsx
+++ b/src/frontend/src/pages/CalendarPage/Components/EventModal.tsx
@@ -115,7 +115,7 @@ export interface EventPayload {
 }
 
 const schema = yup.object().shape({
-  title: yup.string().required('Title is required'),
+  title: yup.string().required('Title is required').matches(/^\S*$/, 'Whitespace is not allowed'),
   eventTypeId: yup.string().required('Event Type is required'),
   requiredMemberIds: yup.array().of(yup.string().required()).default([]),
   optionalMemberIds: yup.array().of(yup.string().required()).default([]),