> Or, we come up with a system that actually follows the rhythms of nature, rather than forcing a standard schedule year round.
The clock-driven day is one of humanity's greatest inventions. You can't build a spacefaring society on "following the rhythms of nature."
Eh, I say give it a try. Worst case we don't get to space but have a good time.
Eh, we still have timezones, and a spacefaring civilization will most likely at least use a time that matches their planet’s cycle.