Does school holiday affect your business?

My business is sort of sensitive to school holiday, perhaps because when children are on any sort of holidays, parents use the opportunity to go on holiday.
I wonder if this is a universal thing or just apply to UK.

its universal, everybody goes out somewhere on the holiday when they got the chance.

Proxy Sites see a sharp decline in revenue I hear, no games sites or MySpace, Facebook etc. for them to visit through your site. Unfortunately, ofcourse, you have to take these things on the chin.

The only proxy sites which benefit from school holidays are the paid-to-use ones I think; they can use this time to update their systems etc.