UTC a EST JavaScript
var tmpDate = new Date("Fri Jul 21 02:00:00 GMT 2012")
alert(tmpDate);
//Result: Fri Jul 20 22:00:00 EDT 2012
JS Ninja
var tmpDate = new Date("Fri Jul 21 02:00:00 GMT 2012")
alert(tmpDate);
//Result: Fri Jul 20 22:00:00 EDT 2012