Considering how humans have developed a 24 hour sleep cycle due to the Earth's rotational period and our natural diurnal circadian rhythm, and star fleets human only club attitude dictating social norms, how do other species adapt?

Unless Vulcan and Kronos have the same day/night cycle as Earth, the species from these planets would not be accustomed to our day/night cycle. How do they handle the change?

This is asking about Non-humans on Star Fleet ships, which tend to be a "human's only club".

  • 1
    There appear to be at least 5 questions here. You need to tighten this up. Are you asking about ship-board life, duty rosters, whether other planets have differing rotational periods or what?
    – Valorum
    Feb 13, 2015 at 0:04
  • 2
    They are all connected...
    – user16696
    Feb 13, 2015 at 0:26
  • 2
    Vulcans are stoic. They would take the Star Fleet shipboard time in stride. Romulans, however, would simply take the ship over and adjust the time accordingly. Feb 13, 2015 at 2:10
  • 1
    If I did, I wouldn't need to ask. But in real life, look at the mars rover teams who had to adapt to Mars time (40 minutes longer each day adds up). Or how wolves and cats, mainly nocturnal or crepuscular have become diurnal through human contact as dogs.
    – user16696
    Feb 13, 2015 at 3:33
  • 1
    @cde Your question remains unclear. Are you asking about what happens when aliens visit Starfleet vessels, or are you asking about sleep cycles on board the alien vessels? I would assume individual sleeping quarters could be set to duplicate the daily cycle of any guests or prisoners taken aboard the larger Starfleet vessels. Feb 13, 2015 at 17:45

1 Answer 1


There's actually very little canonical to go on, honestly.

The NX era (2150s) and the NCC-1701 era (2260s) both show us relatively unmixed crews. NX-01 had only two aliens (T'Pol and Phlox), while NCC-1701 had only one alien (Spock) until after its refit. Neither Star Trek: Enterprise nor Star Trek [classic] ever once broached the subject. Both, however, suggested at various times that Vulcans, at least, have greater control over processes that, for humans, would be entirely autonomic. This suggests that Vulcans might be able to adjust their sleep cycle accordingly. The NCC-1701-D era suggests that starships now have more integrated crews, but still never seems to talk about this issue.

On the flip-side, Bajor is glossed to have a 26-hour day, and both Deep Space 9 and Defiant run on this schedule, requiring Terrans to adjust accordingly. Nobody ever mentions having a problem doing so, however. They simply seem to accept it as a fact of life.

  • So basically what you're saying is, the attitude is "suck it up and deal with it". Aug 6, 2015 at 11:06
  • Actually, I think the attitude is, "Star Trek isn't about sleep deficit disorder" :-) Page through the many questions that have no answers and you're left with the inescapable conclusion that the writers just never cared enough to answer them. It wasn't what the show was about. Aug 6, 2015 at 16:14

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.