Example fo recurring event, 1 week, no end, exported by Google

# The recurring event were recorded every monday the 20150518. This is the Recurrence-id, but then
# first occurrence was moved on tuesday. So this record were added.
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20150519T100000
DTEND;TZID=Europe/Paris:20150519T110000
DTSTAMP:20150517T175754Z
UID:9026chuafli29ns5soshvckamc@google.com
RECURRENCE-ID;TZID=Europe/Paris:20150518T100000
CREATED:20150517T174404Z
DESCRIPTION:
LAST-MODIFIED:20150517T175008Z
LOCATION:
SEQUENCE:1
STATUS:CONFIRMED
SUMMARY:aaa
TRANSP:OPAQUE
END:VEVENT

# The recurring event were recorded every monday the 20150518.
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20150518T100000
DTEND;TZID=Europe/Paris:20150518T110000
RRULE:FREQ=WEEKLY;BYDAY=MO
DTSTAMP:20150517T175754Z
UID:9026chuafli29ns5soshvckamc@google.com
CREATED:20150517T174404Z
DESCRIPTION:
LAST-MODIFIED:20150517T174404Z
LOCATION:
SEQUENCE:0
STATUS:CONFIRMED
SUMMARY:aaa
TRANSP:OPAQUE
END:VEVENT




Example fo recurring event, every 2 month, no end, exported by Google

BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20150519T080000
DTEND;TZID=Europe/Paris:20150519T090000
RRULE:FREQ=MONTHLY;INTERVAL=2;BYMONTHDAY=19
DTSTAMP:20150517T175754Z
UID:urkq3ih1mlaqeu4dbkpdh4i61s@google.com
CREATED:20150517T175658Z
DESCRIPTION:
LAST-MODIFIED:20150517T175658Z
LOCATION:
SEQUENCE:0
STATUS:CONFIRMED
SUMMARY:bbbbb
TRANSP:OPAQUE
END:VEVENT
