Open the calendar (MS Office Outlook 2013).
Open the Ordner tab, click on Open Calendar and select From the internet.
4. Paste the URL from step 1 into the calendar URL box and click OK.
5. Make sure to subscribe to the calendar you just added in order to update MS office.
6. Voilà! The newly added calendar can be hidden or displayed via corresponding checkboxes.
NOTE: MS Outlook does not support calendar reminder notifications.