private static function getMonths(): array
    {
        $months = [-1 => static::getConstant('TXT_DATETIME_MMM', 'TXT_DATETIME_MMM')];
        for ($i = 1; $i <= 12; $i++) {
            $months[$i] = static::getConstant('TXT_DATETIME_MONTH_'.$i.'_SHORT', 'TXT_DATETIME_MONTH_'.$i.'_SHORT');
        }
        return $months;
    }