BuddyPress.org

There are so many causes of time-settings problems that you really have to dig into the threads and see if you can find what’s causing your particular issue.

Here are a few to start:

https://buddypress.org/forums/topic/time-offset-is-incorrect#post-22818

https://buddypress.org/forums/topic/the-tale-of-the-time#post-14726

https://buddypress.org/forums/topic/timezone-problem#post-11955