public static function Validate($date, $format = DATEFORMAT::YMD, $separator = "/")
	{
		$timestamp = DateUtil::TimeStampFromStr($date, $format);
		$dateCheck = DateUtil::FormatDate($timestamp, $format, $separator, true);

		$date = $date . substr('--/--/---- 00:00:00', strlen($date));

		$timestamp2 = DateUtil::TimeStampFromStr($dateCheck, $format);
		return ($timestamp == $timestamp2) && ($date == $dateCheck);
	}