If you have added an Event to the Calendar in error, you can delete it as long as NO end-users have enrolled in the Event (it is better to Cancel the Event, rather than delete it). To delete an Event from the Calendar:
1.Navigate to the Calendar page.
2.Click the View list 
icon to change the Calendar view.
3.Click in the row of the Event to be deleted.
4.Click the Remove selected items 
icon on the toolbar.
5.Click OK to confirm deletion of the Event.
6.If the Calendar grid (i.e., Month/Week/Day) is preferred, click the View month 
icon to change back to the Calendar grid.