The average adult human should be sleeping around eight or nine hours every night. In today’s work-a-holic environment, many do not get this amount of sleep due to working up to eighty hours a week, or more, instead of the more appropriate forty hour work week because they can’t afford not to do the work. That said, some humans prefer to stay up late into the night and can function off a lower amount of sleep.
It all depends on how much sleep they get during the week and the weekend. Others prefer to stick to the adage “early to bed, early to rise”. By going to bed early, they can get more out of their morning. It also makes more sense with the circadian rhythm that is naturally in the human system - to sleep when the sun sets and wake when it rises.
