private function parseCalendar(HTTPRequest $request, Announcement $announce)
 {
     $dateIntervalOneDay = new DateInterval('P1D');
     $dateIntervalSixMonth = new DateInterval('P2Y');
     $publicationDate = new DateTime();
     $publicationDate->add($dateIntervalOneDay);
     if ($request->postData('publication-date-radio') == 'manual') {
         $date = $request->postData('publication-date');
         $date = DateTime::createFromFormat('j/m/Y', $date);
         $publicationDate = $date;
     }
     $announce->setPublicationDate($publicationDate->format('Y-m-d'));
     $endPublicationDate = $publicationDate;
     $endPublicationDate->add($dateIntervalSixMonth);
     if ($request->postData('end-publication-date-radio') == 'manual') {
         $date = $request->postData('end-publication-date');
         $date = DateTime::createFromFormat('j/m/Y', $date);
         $endPublicationDate = $date;
     }
     $announce->setEndPublicationDate($endPublicationDate->format('Y-m-d'));
 }