Есть сайт: 
http://twzgame.ru/time
Взял с него скрипт:
function updateTime() {
	var now = new Date();
	var startHours = now.getUTCHours();
	var startMinutes = now.getUTCMinutes();
	var startSeconds = now.getUTCSeconds();
	var extraHours = Math.floor(startMinutes*6/60)+0;
	var extraMinutes = Math.floor(startSeconds*6/60);
	var extraSeconds = 0;
	var hours =   (startHours*6   + extraHours )%24;
	var minutes = (startMinutes*6 + extraMinutes)%60;
	var seconds = (startSeconds*6 + extraSeconds)%60;
	if (seconds < 0) {
		minutes--;
		seconds+= 60;
	}
	if (minutes < 0) {
		hours--;
		minutes+= 60;
	}
	if (hours < 0) {
		hours += 24;
	}
	return function() {
		//Update time
		if (++seconds == 60) {
			seconds = 0;
			minutes++;
		}
		if (minutes == 60) {
			minutes = 0;
			hours++;
		}
		if (hours == 24) {
			hours = 0;
		}
		self.postMessage([hours, minutes, seconds]);
	}
}
var updater = updateTime();
setInterval(updater, 166.667);
Переделал так:
function updateTime() {
	var now = new Date();
	var startHours = now.getUTCHours();
	var startMinutes = now.getUTCMinutes();
	var startSeconds = now.getUTCSeconds();
	var extraHours = Math.floor(startMinutes*6/60)+0;
	var extraMinutes = Math.floor(startSeconds*6/60);
	var extraSeconds = 0;
	var hours =   (startHours*6   + extraHours )%24;
	var minutes = (startMinutes*6 + extraMinutes)%60;
	var seconds = (startSeconds*6 + extraSeconds)%60;
	if (seconds < 0) {
		minutes--;
		seconds+= 60;
	}
	if (minutes < 0) {
		hours--;
		minutes+= 60;
	}
	if (hours < 0) {
		hours += 24;
	}
		//Update time
		if (++seconds == 60) {
			seconds = 0;
			minutes++;
		}
		if (minutes == 60) {
			minutes = 0;
			hours++;
		}
		if (hours == 24) {
			hours = 0;
		}
 WScript.Echo (hours + ':' + minutes + ':' + seconds);
}
var updater = updateTime();
Вопрос: Почему разные минуты и секунды на сайте и в Echo?