Well, when we were in college, we all slept and got up according to our mood. Sometimes we stay up all night, sometimes we sleep until noon, depending on the mood of the day and the degree of staying up late the day before. However, I won't go to bed before 3 am at the latest, because it's too early, and the entrance guard downstairs in the dormitory will open. So, basically, our bedtime is after 3 am, and our wake-up time is after 10 am. But it also depends on the course arrangement. If you have classes in the morning, you must get up early!