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https://support.google.com/calendar/answer/37095?h…
Create a new calendar - Google Help
To remove a calendar from your list, next to the calendar's name, click Options Hide from list. Edit your calendar's name On your computer, open Google Calendar. On the left side of the page, under "My calendars," find your calendar. Next to your calendar, click Options Settings and sharing. In the "Name" box at the top, enter a new name.