I'm not a parent, but I can imagine that if some of my schedule had to change by 30 minutes some months out of the year, I'd find it more inconvenient.

What if school starts/ends at a different time but my job does not?

What if I have a standing appointment at a business that keeps its hours year round that now conflicts with one that changed to winter hours?

It seems more like a different set of problems than a solution.