This article covers how to subscribe to somebody else's calendar.
1) Navigate to your Google Calendar.
2) Click on the + icon next to Other calendars.
3) Choose Subscribe to calendar.
4) Enter the name or email of the person whose calendar you want to view in the field under Add calendar.
5)Press the Enter key when finished or click on the contact listed in the results.
6) To return to the Calendar, click on the arrow in the upper left corner next to Settings.
7) The person's calendar will now be listed in the left hand column under Other calendars. To hide or make an already subscribed to calendar visible. Click on the colour square to the left of the person's name.
Calendar visible
Calendar visible