public static function getDayName($day)
    {
        if ($day < self::DOW_MONDAY || $day > self::DOW_SUNDAY) {
            return '';
        }

        $dayNames = [
            self::DOW_MONDAY => self::poorManTranslate('fts-shared', 'Monday'),
            self::DOW_TUESDAY => self::poorManTranslate('fts-shared', 'Tuesday'),
            self::DOW_WEDNESDAY => self::poorManTranslate('fts-shared', 'Wednesday'),
            self::DOW_THURSDAY => self::poorManTranslate('fts-shared', 'Thursday'),
            self::DOW_FRIDAY => self::poorManTranslate('fts-shared', 'Friday'),
            self::DOW_SATURDAY => self::poorManTranslate('fts-shared', 'Saturday'),
            self::DOW_SUNDAY => self::poorManTranslate('fts-shared', 'Sunday'),
        ];

        return $dayNames[$day];
    }