Earlier quoted context omitted.
What time do you think little children go to bed?
Children tend to be solar powered. Getting them to bed before 10pm in mid summer nights can be a real challenge in northern latitudes. Black out curtains really help. But starting the bedtime routine when the sun is out is a real chore. I honestly have no idea how Alaskans get their kids to sleep at all in the summer.
I don't think there are many one-size-fits-all answers when it comes to kids.