In addition to the default timezone, you can display timezones that have been marked as favourites by you. The default timezone can be changed in the basic settings
How to display multiple timezones in a calendar view:
Click on in the tool bar. Select one of the following entries: , or .
Click on the button on the left side above the calendar sheet.
A menu opens. Enable a timezone in the menu below Favorites.
By clicking on you can add/remove timezones to/from favourites.