But 6am is a made up construct. It's an artifact of the logistics of getting kids to school before the parents' working hours and accommodating those kids' aft

But 6am is a made up construct. It's an artifact of the logistics of getting kids to school before the parents' working hours and accommodating those kids' after-school jobs. If you move school an hour later then typical working hours also have to move an hour later and nothing actually changes. Our children will say it is unnatural for teenagers to wake up at 7am.