protected function dateDiffNoDST(\DateTime $from, \DateTime $to)
    {
        $fromUTC = new \DateTime($from->format('Y-m-d\TH:i:s+00:00'));
        $toUTC = new \DateTime($to->format('Y-m-d\TH:i:s+00:00'));

        return $fromUTC->diff($toUTC);
    }