The remaining time back to thirty-day left

[rsendres]

$('#counter').countdown({
image: "digits.png",
format: "dd:hh:mm:ss",
endTime: new Date('07/16/13 05:00:00')
});
if use this format above, and current date of my computer is the same "07/16/13 05:00:00" The remaining time back to thirty-day left (30days,00h,00m,00s). The correct thing to reset the timer to 00days, 00h, 00m,00s...