public function monthInRoman($number)
    {
        $number = intval($number);
        $romanNumbers = array(
                1  => 'I',
                2  => 'II',
                3  => 'III',
                4  => 'IV',
                5  => 'V',
                6  => 'VI',
                7  => 'VII',
                8  => 'VIII',
                9  => 'IX',
                10 => 'X',
                11 => 'XI',
                12 => 'XII');
        if ($number >= 0 && $number <= 12) {
            return $romanNumbers[$number];
        } else {
            return $number;
        }
    }