BEGIN:VCALENDAR
                        VERSION:2.0
                        PRODID:-//hacksw/handcal//NONSGML v1.0//EN
                        BEGIN:VEVENT
                        UID:299832e8618fc807e1ae19efadf4a2a5https://www.olsd.org.uk
                        DTSTAMP:20260725T025810
                        DTSTART:TZID=20260725T025810
                        DTEND:TZID=20260725T025810
                        SUMMARY:Mass (First Saturday)
                        DESCRIPTION:
                        END:VEVENT
                        END:VCALENDAR