Add the calendar to your phone via the following links.
iCal format (i.e. for iPhones):
https://calendar.google.com/calendar/ical/c_7o3ar2q9cps163p2ido6av6i78%40group.calendar.google.com/public/basic.ics
Public URL:
https://calendar.google.com/calendar/embed?src=c_7o3ar2q9cps163p2ido6av6i78%40group.calendar.google.com&ctz=America%2FNew_York