Reliability of time functions

[haggen]

Could somebody (preferably Chip himself :P) answer me in detail how the functions below calculate the time, and what timezone they're in.

1. GetTimeStamp
2. GetFormattedTime
3. GetTimeString
4. GetDate
5. GetGameTimeMilliseconds
6. GetFrameTimeMilliseconds
7. GetFrameTimeSeconds
8. GetSecondsSinceMidnight

I'm particularly interested if any of the functions are based on the server's local time instead of the client's.

Thanks in advance!