Builds show incorrect start times
Accepted answer
The build times are stored as Linux Epoch time on the server. The client then must interpret that time into an appropriate client presentation. This is done with the client JVM for the RTC client. Starting your Eclipse client with the vmargs of -Duser.timezone=<timezone>, will start the client in that timezone. Look up your timezone for what value to fill into the timezone.
~Spencer
One other answer
Yes, the build's start time is recorded as millis-since-epoch, but there's an inconsistency in how that's treated. It's assigned based on the server's clock, but rendered based on the client machine's clock.
The timezone conversion should be taken care of by the client already though.
Maybe Eclipse is unable to determine the timezone properly for some reason. Check what it's choosing for user.timezone in Help > About > Installation Details > Configuration (when not specified with -D, of course).
A separate, known issue is that you can get discrepancies if there's significant clock drift between the client and server.