protected function hijriToTimestamp(
        $arYear, $arMonth, $arDay, $hour = null, $minute = null, $second = null, $correction = 0
    ) {
        $hour = isset($hour) ? $hour : date('H');
        $minute = isset($minute) ? $minute : date('i');
        $second = isset($second) ? $second : date('s');
        
        return (new Mktime())->mktime($hour, $minute, $second, $arMonth, $arDay, $arYear,
            $correction);
    }