BEGIN:VCALENDAR
VERSION:2.0
BEGIN:VEVENT
URL:https://www.chat-fr.org/evenements/viewevent/375-retour-vers-18-h?groupid=136 
DTSTART:20170628T130000
DTEND:20170628T140000
SUMMARY:retour vers 18 H
RRULE:FREQ=DAILY;UNTIL=20170630T000000
DESCRIPTION:
LOCATION:ici
END:VEVENT
END:VCALENDAR