Calendar

Don't download the calendar and import into your own calendar as you'll then not receive important updates.

If you use Outlook, Apple iCal, iOS, Android, you should Subscribe to the calendar (so that you will automatically receive updates) using the following URL:

https://calendar.google.com/calendar/u/1?cid=c3VwZXJ0cm9vcDE5N0BnbWFpbC5jb20