A time that does not leave you mentally dead the following day.
you need at least 8 hours of sleep
About 9pm! So hurry up!
I'm up at six too in the morning, I usually go between 11-12.
As soon as you can. Maybe 8, or at the latest 10, but if you're not in bed at least by 11 or 12 you'll be sorry in the morning
Between 9 and 10 pm it's ok.
you go to school on a sunday?
before 10 pm , early to bed is early to rise