We go to bed at 9. Sometimes before to watch a film or doom scroll. We are up extra early. DD says she cannot possibly go to bed at this time too and has set herself a bed time of 10. However I've just heard her getting in to bed now and she was fucking about not actually in bed so could have been a midnight bedtime on a school night. She wakes up at 7 to get ready for school and it's 50/50 as to whether she is cheery or the devil. She is never spritely. I forget, at my age, whether spritely in the morning was ever actually a thing. So I've given her a stern word and said we'll have a chat tomorrow about appropriate bed times and strict rules. She has friends who go later and who go earlier.
So, 13 years old and up at 7am - when is bedtime?