Google Calendar: https://calendar.google.com/calendar/u/1?cid=Y182MDQzMmNlMzAxYzFkOTE5ODdmOWU4NWMwMTZkMzlhNzczMWJlZTM2NTI4MmUwNTI2ZmI4M2Q0Y2E2NjBiMzliQGdyb3VwLmNhbGVuZGFyLmdvb2dsZS5jb20
iCal: https://calendar.google.com/calendar/ical/c_60432ce301c1d91987f9e85c016d39a7731bee365282e0526fb83d4ca660b39b%40group.calendar.google.com/public/basic.ics