BEGIN:VCALENDAR METHOD:PUBLISH VERSION:2.0 BEGIN:VEVENT SUMMARY:Tag der Deutschen Einheit 2022 CREATED:20220921T110000Z DTSTART:20221001T090000Z DTEND:20221003T170000Z LOCATION:Erfurt END:VEVENT END:VCALENDAR response.setHeader("Content-Disposition","attachment;filename=event.ics");