Calendar Tab. To view the calendar, switch to the calendar window by pressing ctrl+2 or click on the calendar icon at the foot of the folder pane. If you downloaded one of those templates and there isn't any calendar tab on the ribbon, try downloading it again.

Displays your calendar’s weekly, or monthly schedules and agenda on new tabs. The navigation bar at the bottom of the screen allows you to switch between the different features in outlook like email, calendar, contacts (or people) and tasks.