BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//collective//icalendar//6.3.2.dev310//EN
BEGIN:VEVENT
UID:1
DTSTAMP:19960817T083000Z
SUMMARY:Event 1
END:VEVENT
BEGIN:VEVENT
UID:2
DTSTAMP:19960817T083000Z
SUMMARY:This starts one week after Event 1
RELATED-TO;VALUE=UID;RELTYPE=STARTTOSTART;GAP=P1W:1
END:VEVENT
END:VCALENDAR