I've always had kids of all ages here for that length. I don't think I have anyone here for less than 10 hours (sometimes one). I've never had an issue with adjustments to it or anything. Same old, same old. I'm open for 12 hours a day, so anything less than that is just lovely in my mind
My sister works for government here as well and does that extra hour too for that 1 Friday every 3 weeks off. She still pays for that day though. It's her choice not to use it.