It will change over time. My child is now in high school, but not yet driving age, so I have to provide much of the transportation. School starts at 7:30am, 4 days a week (0 period) and 9am the other day. He has after school activities that means he gets home at 9:30pm 2-3 nights a week. He stays at school the entire time and studies or goofs off with the rest of the band students depending on his workload.
Going to bed before 10pm is basically impossible for us. 11pm is more common. Then it's up again between 5:30 and 6:30 to do it all again.