Switching clocks changes the schedule only by one hour, in a one-size-fits-all fashion. Even at 30deg north, summer and winter sunrises are multiple hours apart

Switching clocks changes the schedule only by one hour, in a one-size-fits-all fashion. Even at 30deg north, summer and winter sunrises are multiple hours apart. This is why summer and winter schedules for businesses are multiple hours apart in far northern areas. Somehow enough coordination is managed organically.