You can create a calendar group that displays multiple calendars together so that you can easily compare dates and appointments and schedule events at a time that everyone has available.
Display the Calendar window. In the My Calendars area, select the check boxes of the calendars that you want to display.
On the Home tab, in the Manage Calendars group, click Calendar Groups.
Choose Save As New Calendar Group.
Type a name for the calendar group.
The new group appears in the Folder pane on the left side of the Calendar window.