public function setDateFormat(Event $e)
    {
        /* @var EventsForm $form */
        $form = $e->getParam('form');
        /* @var EventsHydrator $hydrator */
        $hydrator = $form->getHydrator();
        /* @var DateTime $dateTimeStrategy */
        $dateTimeStrategy = $hydrator->getStrategy('dateTime');
        $dateTimeStrategy->setHydrateFormat($this->getOptions()->getDateFormat());
    }