Individual users cannot set a specific timezone at the user profile level. Timestamps in Rally (such as revision history) appear in a single timezone for all users, regardless of their physical location.
Symptoms
Rally removed the ability for individual users to choose a personal timezone to ensure workspace-wide consistency. The timezone is now configured globally at the Workspace level.
The timezone setting is managed by Workspace or Subscription Administrators. To update the Workspace timezone:
Note: Changes made here apply to all users within that specific workspace.
https://community.broadcom.com/communities/community-home/digestviewer/viewthread?MID=760177