when it comes to school holidays , France is divided into zones , the 3 zones have different holidays , except in the summer and xmas I think .
There French are also pretty hardcore when it comes to pupils missing school, for any reason. There are pretty hefty penalties.
Personally I am totally opposed to taking kids out of school for holidays. It teaches them that education is less important than more frivolous stuff and can have a serious effect on their attitude to learning. Parents who dress up their self interest in “but little johnny will learn loads, will write a diary, will do all his work etc etc” are just justifying their own self interest as other than seeing a few foreigners not much really happens. Certainly no more than if the holiday was during proper school holidays.
I see it all the time at college, kids (always the ones with relatively affluent parents) get taken off for holidays, fall behind on their work, do badly in their exams and then the parents are asking me what I am going to do about it. All parents seem to think their kids are clever and a week off here or there will not affect their learning. Unfortunately, their perception of their kids ability is usually exaggerated and their learning is affected no matter how good the kids are. Equally cheap holidays seem to be a bit like crack, no matter how often people say “only this once”, once they get a taste for it they cant stop, even when it comes to important periods like GCSE and A level years.
However do what you like but: accept the responsibility for you genius kids doing less well than you expected, don’t moan about crap schools and teachers being the only reason behind said underachievement, don’t expect the teachers to do loads of extra work to bring your kids up to speed etc etc.