Subscribe to this calendar in Google Calendar.

To subscribe to this calendar in iCal or Mozilla Sunbird, the subscription URL is
http://www.google.com/calendar/ical/1ke8nqj6178vs6emnshrloi6pg%40group.calendar.google.com/public/basic.ics
For iCal, choose Subscribe..., then paste in this URL. For Sunbird, choose Subscribe to Remote Calendar..., then On the Network, then iCalendar (ICS), then paste the URL in the Location field.