Please follow these instructions to subscribe to the calendar in Outlook on Windows:

1. Copy the calendar link.
2. Switch to the calendar view in Outlook.
3. Right click My calendars (or Other calendars), select Add calendar, select From Internet.
4. In the dialogue that pops up, paste the calendar link.
5. Approve the subscription.

The calendar is now available in Outlook. Check the checkbox besides the new calendar to view it.

For Safari on Mac, read these instructions.

In other calendar applications, copy the link and then follow the appropriate procedure.