Javascript countdown for specific time and date

Question

I am using a jQuery plugin to put the countdown timer in my webpage. Currently the code that controls what the timer displays is:

Answer 1

Get the current time, and note that this will be the time set on the users computer clock, whatever that is set to, and set a certain date, then calculate the difference and use that for the plugin:

var date  = new Date(Date.UTC(2013, 8, 30, 12, 0, 0));
var now   = new Date();
var diff  = date.getTime()/1000 - now.getTime()/1000;

var clock = $('.clock').FlipClock(diff, {
    clockFace: 'DailyCounter',
    countdown: true
});

For accurate times I would reccoment using your webserver to output the current time.