On your computer, open Google Calendar. You can’t share calendars from the Google Calendar app.

On the left, find the “My calendars” section. To expand it, click the Down arrow .

Hover over the calendar you want to share, and click More  (3 vertical dots) Settings and sharing.

Under “Share with specific people,” click Add people.

Add a person’s or Google group’s email address. Use the drop-down menu to adjust their permission settings. Learn more about access permissions.

Click Send.

The recipient will need to click the emailed link to add the calendar to their list.