Date.prototype.addHours= function(h){
    this.setHours(this.getHours()+h);
    return this;
}

var d = new Date();
h = -d.getTimezoneOffset()/60;
d = new Date("February 22, 2010 17:00:00").addHours(h);

$('#countdown').countdown({until: d, format: 'd', labels: ['','','',''], labels1: ['','','','']});