Users view dates and times in the intranet in their local time, since Bitrix24 detects browser settings and adjusts times displayed appropriately. So wherever an employee is located, he or she will be able to view portal activities in reference to the proper local time - this is especially useful in the Activity Stream, blogs, and forums.
Meetings which are planned among employees in different time zones are correctly displayed for each participant, regardless of their location.
When a users enter the intranet, their local time is detected and the difference with the server is noted for that session.
Time zone setting for an individual user
Server time zone settings
|Blog: BSM v11.0: Keeping hours straight|