How to Delete an Event
Access the Calendar module and select either view.
Double-click the event intended to be deleted.
In Room view, clicking the desired event once shows two options: Set Rooms and Edit Event.

Click Edit Event to open the Edit Event pop-up window.
The Edit Event pop-up window appears.
3. Click the three-dot icon in the top right corner of the pop-up window.

The Delete button appears.
4. Click the Delete button.
A window pops up confirming the deletion.
For further information, visit
Calendar - How-to pages