[perilunar]

I think that once a large number of people are living off-Earth, we should just use Unix time to coordinate and for all technical work.

Planets can use a local solar time and calendar. Habitats in free space could just move to Unix time and use a 100 kilosecond day.

[ymolodtsov]

Yes, but what do you use in life? What's on your watch?

[perilunar]

Ideally, whatever time is used locally, UTC, and Unix time.