I wonder how they would handle this in space, or on other planets? If you’re in a ship, there is no sunrise or sunset, and you aren’t going to have a 24 hour cycle of sunrise and sunset on the moon, Mars, Venus, or some alien planet orbiting a distant star.

I guess the simplest answer is to pick a location that matches whatever time they are running on (since people presumably still operate on a 24 hour clock) and to align the timing to match that. If the important thing is the observance of the ritual rather than the celestial events, then this works I guess.

On the other hand, if you’re in space on a ship or station, sunrise and sunset could be simulated by simply reorienting the thing so that the sun is hitting one side or another. Does orbiting earth or another planet mean that sunrise and sunset happen in rapid succession as you pass in and out of the planet’s shadow?

And on an alien planet with our sun as a star in the night sky, do you time it based on the star that planet is orbiting or the position relative to our sun? And then there’s the question of what the date even is, since you not only have a different local orbit and seasons, but you might not even be moving through time at the same rate, and relativity makes the concept of “now” kind of tricky when spread across interstellar distances.