diff --git a/samples/react-calendar/src/services/IEventData.ts b/samples/react-calendar/src/services/IEventData.ts
index c5cab8557..a62765ffb 100644
--- a/samples/react-calendar/src/services/IEventData.ts
+++ b/samples/react-calendar/src/services/IEventData.ts
@@ -20,6 +20,6 @@ export interface IEventData {
   fRecurrence?: string | boolean;
   EventType?: string;
   UID?: string;
-  RecurrenceID?: string;
+  RecurrenceID?: Date;
   MasterSeriesItemID?: string;
 }