Only helpful while we're (nearly) all on the same celestial body. What matters is whether someone is by convention asleep, working, or relaxing. I expect we'l

Only helpful while we're (nearly) all on the same celestial body. What matters is whether someone is by convention asleep, working, or relaxing. I expect we'll plug UTC into some software to determine exactly that. Or more directly, ping their calendar to see when they designate themselves available.