BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//PIMUTILS.ORG//NONSGML khal / icalendar //EN
BEGIN:VTIMEZONE
TZID:Europe_London
BEGIN:DAYLIGHT
TZOFFSETFROM:+0000
TZOFFSETTO:+0100
TZNAME:BST
DTSTART:19810329T010000
RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=3
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0100
TZOFFSETTO:+0000
TZNAME:GMT
DTSTART:19961027T020000
RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=10
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
SUMMARY:An Event
DTSTART;TZID=Europe_London;VALUE=DATE-TIME:20140509T193000
DTEND;TZID=Europe_London;VALUE=DATE-TIME:20140509T203000
DTSTAMP;VALUE=DATE-TIME:20140401T234817Z
UID:123
END:VEVENT
END:VCALENDAR