From http://stackoverflow.com/questions/17018055/doctrines-date-field-how-to-write-query

new_gist_file_0

    if(null !== $today) {
        $today0 = new \DateTime($today->format("Y-m-d"));
        $today23 = new \DateTime($today->format("Y-m-d"));

        $today0->setTime(0,0,0);
        $today23->setTime(23,59,59);

        $qb->where($qb->expr()->orX(
            $qb->expr()->orX(
                $qb->expr()->between('r.dateFrom', ':today0', ':today23'),
                $qb->expr()->between('r.dateTo', ':today0', ':today23')
            ),
            $qb->expr()->andX(
                $qb->expr()->lte('r.dateFrom', ':today23'),
                $qb->expr()->gte('r.dateTo', ':today0')
            )
        ));
        $qb->setParameter('today0', $today0);
        $qb->setParameter('today23', $today23);
    }