Copy this URL:
https://calendar.google.com/calendar/ical/c_7e85d46ec9789bdf4d74a9338f23ca7d11dc906998a7c6b74a49aecf00f6b66c%40group.calendar.google.com/public/basic.ics
Open your calendar app or website (Outlook, Apple Calendar, iPhone Calendar, Gmail or Android Calendar, etc.).
Find and choose ‘Subscribe to a Calendar’.
Paste the link and confirm.