I was watching
The Undiscovered Country and something struck me... The clock.
It's the only iteration of
Star Trek where a very visible clock is a significant part of the bridge (with the time of Gorkon's assassination being important to the plot). But I started to wonder about the implications of that clock and whether ALL Starfleet vessels, no matter where they are, operate by a standardized time/clock?
And what would they set the time by? It's a 24-hour clock, so it seems to be based on an Earth time.
- But would Greenwich Mean Time (GMT)/Zulu/UTC still have dominance in the 23rd century?
- Since the Federation President and Council seem to have their main offices in Paris, would it be the Central European Time Zone?
- Or, since Starfleet Command is in San Francisco, would Starfleet vessels base their clocks on the Pacific Time Zone?
To further complicate this,
Deep Space Nine implies the station operates on a 26-hour day. However, it is a Bajoran station. So the Bajorans can set the time to whatever they want on their station.