public function toNativeDateTime()
    {
        $year  = $this->getYear()->toNative();
        $month = $this->getMonth()->getNumericValue();
        $day   = $this->getDay()->toNative();

        $date = new \DateTime();
        $date->setDate($year, $month, $day);
        $date->setTime(0, 0, 0);

        return $date;
    }