The body gets the most restful sleep from 10:00pm-2:00AM. Your sleep runs in 90 minute cycles–from deep, to non-REM, to REM sleep. The later you get into the night, the deeper your REM sleep gets.
Non-REM sleep is responsible for declarative long-term memory. Declarative memory works on things that you can consciously recall, such as facts. REM sleep is responsible for procedural long-term memory, such as motor skills. It is known now that Non-REM just as beneficial as REM sleep.
The earlier you sleep, the more time you give your brain to fully recharge for the next day.
Contributors: Rebecca Lee from RemediesForMe