public function setDayOfDeliveryDate($dayOfDeliveryDate, $useIntTime = false) {
		if($useIntTime) {
			$dayOfDeliveryDate = date('Y-m-d', $dayOfDeliveryDate);

			if($dayOfDeliveryDate === false)
				$dayOfDeliveryDate = null;
		}

		$this->dayOfDeliveryDate = $dayOfDeliveryDate;
	}