What time should a 12 year old have as bedtime on school night?

The American Academy of Pediatrics (AAP) recommends that children ages 6-12 years get 9-12 hours of sleep per night on a regular basis to promote optimal health. For a 12-year-old, this means that a reasonable bedtime on a school night would be between 8:00 PM and 9:00 PM to ensure they have sufficient time to get the recommended amount of sleep.