private function getDifference($value): ?int
    {
        // Let's prepare the dates...
        $now = (new \DateTime())->setTime(0, 0);
        $date = Date::getDateTime($value);

        // ...and make comparison with "day" as unit
        if ($date instanceof \DateTime) {
            return Date::getDateDifference($now, $date, Date::DATE_DIFFERENCE_UNIT_DAYS);
        }

        return null;
    }