Evolution supports the use of time zones. If you share calendar files with friends or co-workers, it is possible you will need to configure your time zone. To configure your time zone:
Click Edit > Preferences, then click Calendar and Tasks.
Click the icon next to the Time Zone field, then select your location.
Each red dot represents a major city.
Select a city, then click OK.
You can also configure time zone information specific to the Start and End time in each appointment. To do that, simply create a new appointment and click on a globe to customize the time zone that the time exists in. For example, if you live in New York but have a telephone meeting set for noon with someone in California, you need to make sure that you're not calling each other at a bad time. Setting time zones on a per-appointment basis helps avoid that potential confusion.