My body goes to sleep when it wants to go to sleep and wakes when it wants to wake...habits, schedule, etc. have had no effect. I can fall asleep one night at 11 and wake up at 8 the next day. I can fall asleep at 2 another night and wake up at 4 and not be able to go back to sleep. it’s quite annoying...
People ages one to 23 need ten to twelve hours of sleep….after that ten hours