I have teachers kids, all expect my newest child. The mom has a very flexible schedule, so I'm able to fit her in when my youngest is in preschool. So in a way, she'll be following the school calendar as well.
I technically stay open for Christmas and spring break. I rarely have anyone say they plan to come, even though I encourage them to go out and do their Christmas shopping, etc. If I get kids, it's usually only one or two, for a short day. Anyways, they pay me for stats. If I wasn't open, they would not pay for the stats.