How to Deactivate Calendars
Navigate to Settings > Calendars.
Choose the one you’d like to deactivate, and click the 3-dot dropdown menu.
Click “Deactivate calendar”
In the popup window, click Save to deactivate the calendar.
Back in the calendar settings area, you’ll be able to tell which calendars are active by the “Status” column that shows draft and active calendars.
How to Activate Calendars
Click the 3-dot dropdown menu for the calendar you wish to reinstate, or activate.
Click “Activate Calendar”.
The calendar will be instantly re-enabled.