You can only add a calendar using a link if the other person’s calendar is public.

  1. On your computer, open Google Calendar.
  2. Next to “Other calendars” on the left, click the Down arrow Down Arrow.
  3. Select Add by URL 
  4. Enter the calendar’s address in the field provided: https://calendar.google.com/calendar/ical/adaptiveclimbingclub%40gmail.com/public/basic.ics
  5. Click Add Calendar. The calendar will appear on the left side under “Other calendars.”