[Ctrl]+2: Go to Calendar view from any other view.

[Alt]+1-9: View specific number of days, beginning with the selected day. For instance, if April 14 is selected and you press [Alt]+4, Calendar will display April 14 through 17. I use this one often.

[Ctrl]+G: Go to a specific date. When you press [Ctrl]+G in Calendar view, Outlook displays a dialog box. Enter a date or choose a date from the dropdown, and click OK. Calendar view will maintain the current view.

[Alt]+-: Switch to Weeks view. (That’s the hyphen or minus character to the right of 0.)

[Alt]+=: Switch to Month view. (That’s the equal sign to the left of [Backspace]).

[Ctrl]+[Shift]+A: Create a new appointment in any view.