@boomerang,
I'm a natural night owl of sorts - I remember watching tv to 1 a.m. when I was twelve as my dad and I liked to watch a certain chaotic but interesting chicago late night program, the Tom Duggan show. But even before that, I read in bed until the twelfth of never. Back then we lived close to my school.
In high school, once I hit sixteen I worked three days a week after school and on weekends and dealt with more homework and was reader otherwise. Longer way to school, and more than one bus to my job. Parent picked me up in the hospital circle or a friend who worked there too, in her case as a Tray Girl (helper in the wards), took me home on her way to hers. Midnight awakeness was part of that.
I don't know that it was any kind of circadian change for me though I get that happens - when, over decades, I've had night classes in art or landscape architecture or evening design review meetings, stuff that had me alive and perking, I'd have trouble getting home and bopping right to sleep. When I used to use the now-to-me-fabulous etching press on the sixth floor of the art building often to around 1 a.m., I'd stop at 7-11 on the way home, buy a pint of ice cream and a magazine and go home and loll before getting to sleep. Work at 8 a.m.
Over time I noticed my most energetic/creative time of day was something like 4 p.m.
Years go by and for various reasons I'm up relative to the sun, but sort of jerky as my natural night owl shows up sometimes.
So, re school, what would I like to see for kids? Choices. In this education climate here in the U.S. I don't think that'll happen anytime soon, if ever.
I can well see why Sozobe chose later class times in university years.