BEGIN:VEVENT
DTSTAMP:20170209T192358
SUMMARY:RDATE period
DTSTART:19961230T020000Z
DTEND:19961230T060000Z
UID:rdate_period
RDATE;VALUE=PERIOD:19970101T180000Z/19970102T070000Z,19970109T180000Z/PT5H
 30M
END:VEVENT