That’s “parent” not “adult”

I with no kids at home have excellent sleep

Teens are the ones (after new mothers) who suffer the most, with natural sleep cycles starting around midnight or in the early morning and wake times in the late morning or early afternoon, but school schedules that force them to be active at school from 9am

Sure, but I’m assuming the “mom” in OP’s story was just trying to help their child get enough sleep.