Share your calendar with someone - Google Help
https://support.google.com/calendar/answer/37082?hl=en
On your computer, open Google Calendar.; On the left, find the "My calendars" section. You might need to click it to expand it. Point to the calendar you want to unshare, click More Settings and sharing.; Under "Access permissions," turn off Make available to public.. To stop sharing with specific people: Under "Share with specific people," next to the person you want to remove, click Remove .
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