With Outlook open hit CTRL + 6. This opens the folder view.
Scroll down to public folders and right click on the calendar.
Choose “Add to favorites” This will put it in your “Public Favorites”
Then hit CTRL + 2. This opens the calendar view.
There should now be a checkbox for your Public calendar. Select it.
You should be able to switch between views now and be able to see you public calendar whenever you change to the calendar view.