Morilog\Jalali\jDateTime::jalaliMonthLength PHP Метод

    public static function jalaliMonthLength($jy, $jm)
    {
        if ($jm <= 6) {
            return 31;
        }
        if ($jm <= 11) {
            return 30;
        }
        return self::isLeapJalaliYear($jy) ? 30 : 29;
    }