public static function cWeekEnding($year, $cWeek = 0) {
		if ($cWeek < 1 || $cWeek >= static::cWeeks($year)) {
			return static::cWeekBeginning($year + 1) - 1;
		}
		return static::cWeekBeginning($year, $cWeek + 1) - 1;
	}