Still count what is the time difference between your location and your attendees countries? Already know what is CET, EST, PT and more?

There is no need to count the time with Kommunity since "Localization" will do it instead of you. 

Set an event's date and time in your own time zone. Your event time will change in according to the participant's time zone he/she is currently in or set in the account settings. 

Everyone will be in time with no hustle!