There are a number of reasons why you’d want to be able to compare time zones at a glance–maybe you are a frequent traveler, or your colleagues are distributed across the world. Whatever the case, it is possible to show up to three time zones on your Outlook calendar, easing the mental math quite a bit!
Right click on the calendar icon in the lower left corner. Select options:
Select the Calendar section, then scroll down until “Time Zones”. Here, you can provide a label for the time zone (Home, Mountain Time, Alice, etc) enable a third time zone, and swap time zones as you see fit:
You can see the time zones in the Week, Work Week, Day, and Schedule views of the calendar: