BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
BEGIN:VEVENT
SUMMARY:Sunrise (day change this week only)
DTSTART;TZID=Europe/London:20230928T070000
DTEND;TZID=Europe/London:20230928T171500
LOCATION:South Nutfield
DESCRIPTION: 
STATUS:CONFIRMED
SEQUENCE:0
END:VEVENT
END:VCALENDAR