The industrial revolution made us get up with the chickens?
I actually think it'd be great if we could have seasonal work schedules. Winter work days should be 6 hours, not 8. Let the whole of society hibernate a bit. Leave at least one or two daylight hours that aren't taken up by work or commute.
That'd be offset by having to work 15 during the summer. Up here in Alberta our shortest days are 7.5 hours and longest are 17.