Change Background with CSS on particular date?

Question

Does anyone know how to change the background of a website automatically using CSS on specific dates? Like valentines, easter, xmas etc.

Answer 1

You wont be able to do it using only css but you could do it combining javascript and css like so,

var checkDate=new Date(),
today = new Date();
checkDate.setFullYear(2011,1,14);

if (today.getTime() === checkDate.getTime()){
    document.getElementById("background").className += 'valentinesBackgroundStyle';
}

http://jsfiddle.net/sH429/