This is very much an open question in halacha. I'd assume they'd use Mars time for sunrise/sunset, but how the calendar would work I have no idea. Halacha is ve

This is very much an open question in halacha. I'd assume they'd use Mars time for sunrise/sunset, but how the calendar would work I have no idea. Halacha is very earth-centric and I don't know what it would look like in space.