Google users can subscribe to this calendar by clicking here.

iPhone users can subscribe to this calendar by opening the Calendar App, tapping "Calendars" then "Add Calendar" and "Add Subscription Calendar". Paste the link below into the box.
https://calendar.google.com/calendar/ical/c_de0b5c47800e87865775c3213c49417c976c4161705ceb6e7f234595524f6d9c%40group.calendar.google.com/public/basic.ics

Your calendar app should update when changes are made to the master calendar.