Adding to Google Calendar
If you already use Google calendar click the +Google calendar button at the bottom to add!
iCal Subscription:
Copy and paste the following URL to add the calendar through iCal subscription
https://calendar.google.com/calendar/ical/mastccs.org_vquvfo3b2mq9uhpejtqrcb1gb4%40group.calendar.google.com/public/basic.ics