The time I go to bed is at 10:00 Pm (I used to go to bed at 12:00 PM) and get up at 7:00 AM(For school) because firstly teenagers need 8-10 hours of sleep. Here is how much sleep each group needs.
Infant 4–12 months 12–16 hours per 24 hours (including naps)
Toddler 1–2 years 11–14 hours per 24 hours (including naps)
Preschool 3–5 years 10–13 hours per 24 hours (including naps)
School Age 6–12 years 9–12 hours per 24 hours
Teen 13–18 years 8–10 hours per 24 hours
Adult 18–60 years 7 or more hours per night
61–64 years 7–9 hours
65 years and older 7–8 hours
We need a good sleep because our brains sort and store information from our day and as you sleep, your body also uses its energy to make your bones, muscles, and other body parts grow. if you don't sleep well you really weaken your immune system, cause thinking issues, and lead to weight gain. So it's good to have a proper time of sleeping.