You can change the timezone associated with your account from your Profile page:
Click on the dropdown menu and you will see all the available timezone options. First find the region you live in (Africa, America, Anctartica, Artic, Asia, Atlantic, Australia, Europe, Indian, Pacific), then select the city related to your time zone (for example Kolkata for India Standard Time, Jakarta for Western Indonesia, Mexico City for Central Zone in Mexico).
It is important to have the correct timezone associated with your account because all video conferences are displayed in the timezone you select from the dropdown.
If you are unable to figure out your correct time zone please send us a request through the support centre.