You can delete events that you create from your class calendar using the following steps:
On the Master menu, click the Calendar tab.
In the calendar, navigate to the event you want to delete and click x in the right corner of the event.
Click Manage Events, click next to the event you want to delete; or to delete multiple events, select the check boxes for the events and click Delete Events.
You are prompted to confirm the deletion. If the event has multiple occurrences, you are prompted to confirm whether you want to delete the selected occurrence or all occurrences in the series.