var currentTime = new Date()
var month = currentTime.getMonth() + 1
var day = currentTime.getDate()

if(month == 5 && day == 24){
    // if day is 24 May
    var div = document.createElement('div');
    div.setAttribute('id', '24may');
    document.getElementById('head').appendChild(div);

    document.getElementById('head').style.position = 'relative';

    var may24 = document.getElementById('24may');

    may24.style.background = 'url(i/24mai.jpg)';
    may24.style.position = 'absolute';
    may24.style.zIndex = '1000';
    may24.style.top = '15px';
    may24.style.left = '246px';
    may24.style.width = '64px';
    may24.style.height = '51px';
}