Trimester 1a start 9/4
Trimester 1b 10/9
Trimester 2a 11/21
Trimester 2b 1/21
Trimester 3a 3/6
Trimester 3b 4/24
When you unsubscribe from a calendar, you won't be able to see it again unless there's another owner of the calendar who can re-share it with you.
On your device, open Google Calendar.
In the top right, click Settings. (the gear icon)
In the left column, select the calendar you want to remove.
Click Remove calendar.
Click Unsubscribe.
Click Remove calendar.