To delete one or more calendars from Calendar Server, use the cscal utility delete command. This utility deletes the calendar, but it does not delete the user from the directory server.
The following two examples demonstrate different tasks you can accomplish with cscal delete:
To delete a specific calendar with the calendar ID email@example.com:meetings:
cscal delete firstname.lastname@example.org:meetings
To delete all calendars whose primary owner is email@example.com:
cscal -o firstname.lastname@example.org delete
The delete command removes all of the calendar information from the calendar database and cannot be undone. After you delete a calendar, you can recover the calendar data only if it was backed up. For more information, see Chapter 17, Backing Up and Restoring Calendar Server Data.