Javascript Date.UTC mysql date converter

utc.date.js

/**
 * Date.UTC mysql date converter
 *
 * @author Lawrence Cherone <lawrence@cherone.co.uk>
 */
var UTC = (function() {
	var _Date = function(year, month, day, hour, minute, second) {
		// year is string string date
		if (typeof year === "string" && year != '' && month == undefined && day == undefined) {
			var regex_date = /^([0-9]{2,4})-([0-1][0-9])-([0-3][0-9])?$/;
			var regex_datetime = /^([0-9]{2,4})-([0-1][0-9])-([0-3][0-9]) (?:([0-2][0-9]):([0-5][0-9]):([0-5][0-9]))?$/;

			// mysql datetime format 00-00-00 00:00:00
			if (year.match(regex_datetime)) {
				var t = year.replace(regex_datetime, "$1 $2 $3 $4 $5 $6").split(' ');
				return new Date(Date.UTC(t[0], t[1]-1, t[2], t[3], t[4], t[5]));
			}
			// mysql date format 0000-00-00
			else if (year.match(regex_date)) {
				var t = year.replace(regex_date, "$1 $2 $3 0 0 0").split(' ');
				return new Date(Date.UTC(t[0], t[1]-1, t[2], t[3], t[4], t[5]));
			} else {
				var dt = new Date(year);
				return new Date(Date.UTC(dt.getFullYear(), dt.getMonth(), dt.getDate(), dt.getHours(), dt.getMinutes(), dt.getSeconds()));		
			}
		} else {
			hour 	= (hour   == undefined) ? 0 : hour;
			minute 	= (minute == undefined) ? 0 : minute;
			second 	= (second == undefined) ? 0 : second;

			return new Date(Date.UTC(year, month, day, hour, minute, second));
		}
	};    

	var _Timestamp = function(year, month, day, hour, minute, second) {
		return _Date(year, month, day, hour, minute, second).getTime();
	};

	return {
		Date: _Date,
		Timestamp: _Timestamp
	};
})();

/* Example - Get UTC Date object from mysql date formats or build */
console.log(UTC.Date('2016-02-01'));             
console.log(UTC.Date('2016-02-01 01:00:30'));   
console.log(UTC.Date(2016, 02, 01, 01, 00, 30));

/* Example - Get UTC timestamp from mysql date formats or build */
console.log(UTC.Timestamp('2016-02-01'));     
console.log(UTC.Timestamp('2016-02-01 01:00:30'));
console.log(UTC.Timestamp(2016, 02, 01, 01, 00, 30));