BEGIN:VCALENDAR
VERSION:2.0
BEGIN:VEVENT
SUMMARY:Local time
DTSTART:20150223T110000
DURATION:PT1H
END:VEVENT
BEGIN:VEVENT
SUMMARY:UTC
DTSTART:20150223T110000Z
DURATION:PT1H
END:VEVENT
BEGIN:VEVENT
SUMMARY:CET
DTSTART;TZID=CET:20150223T110000
DURATION:PT1H
END:VEVENT
END:VCALENDAR