Can't get countdown clock to show the correct time

I have changed my newDate to see where the problem lies but cannot get it to match my target time to 2/22/2012 7pm

this.onEnterFrame = function() {

    var today = new Date();

    var currentYear = today.getFullYear();

    var currentTime = today.getTime();

    var targetDate = new Date(2012, 2, 31, 7);

    var targetTime = targetDate.getTime();

    var timeLeft = targetTime-currentTime;

    //var timeLeft = 900000000000;

    var sec = Math.floor(timeLeft/1000);

    var min = Math.floor(sec/60);

    var hrs = Math.floor(min/60);

    var days = Math.floor(hrs/24);

    sec = String(sec%60);

    if (sec.length<2) {

        sec = "0"+sec;

    }

    min = String(min%60);

    if (min.length<2) {

        min = "0"+min;

    }

    hrs = String(hrs%24);

    if (hrs.length<2) {

        hrs = "0"+hrs;

    }

    days = String(days);

    var counter = String(days + ":" +  hrs + ":" + min + ":" + sec);

    time_days.text = days-31

    time_hrs.text = hrs

    time_mins.text = min

    time_secs.text = sec

};