You can have additional calendars to your own, this is particularly useful for a shared calendar.  To add an additional calendar, open Outlook then follow the steps below.

1. Open your calendar:
   
   
   
   
    
2. • Right click on "Other Calendars, then click "Add Calendar", then click "From Addressbook":
     
     
     
     
      
3. • Double click on the calendar you want to add, then click OK: