protected function setMonthAllDaysIntoArray(\DateTime $lngDate)
    {
        $firstDayGivenMonth  = strtotime($lngDate->modify('first day of this month')->format('Y-m-d'));
        $lastDayInGivenMonth = strtotime($lngDate->modify('last day of this month')->format('Y-m-d'));
        $secondsInOneDay     = 24 * 60 * 60;
        return range($firstDayGivenMonth, $lastDayInGivenMonth, $secondsInOneDay);
    }