Because people in the past to wake up early to come home. Whether it is home cooking, it's off to a child care pathways to work outside the home. Once back home, take a shower and eat and then going to bed.
Because people will wake up each morning before work home to complete. Whether cooking, sweeping the ball home care went to work outside the home. Once back home, shower and eat and go to bed.
Because old people will wake up in the morning chores to complete, such as cooking, sweeping, take care of you, so go to work outside, and upon returning home, shower and eat. Then go to bed.