Healthy sleep is 7-9 hours, too much or too little has no effect.
Sleeping from 1 1 until 3 am at night will have a cosmetic effect, especially to prevent dark circles, which is called' beauty sleep'.
Sleep quality is the most important. If you are energetic during the day, it doesn't matter if you only sleep for two or three hours a day. If the quality of sleep is not good, it is useless to sleep for ten hours a day.
About getting up, it depends on your age and life needs. If you want to work or go to school, it is most important not to be late. If you retire, sleep until you wake up naturally. Everything goes with the flow, and happiness is the most important thing. Happiness is healthy.