BEGIN:VCALENDAR
PRODID:-//Mozilla.org/NONSGML Mozilla Calendar V1.1//EN
VERSION:2.0
METHOD:PUBLISH
BEGIN:VTIMEZONE
TZID:Asia/Phnom_Penh
BEGIN:STANDARD
TZOFFSETFROM:+0700
TZOFFSETTO:+0700
TZNAME:+07
DTSTART:19700101T000000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
CREATED:20190424T071344Z
LAST-MODIFIED:20190424T071348Z
DTSTAMP:20190424T071348Z
UID:22980b30-c69a-491e-9f44-8e8a19d51685
SUMMARY:testing day
DTSTART;TZID=Asia/Phnom_Penh:20181024T150000
DTEND;TZID=Asia/Phnom_Penh:20181024T160000
TRANSP:OPAQUE
END:VEVENT
END:VCALENDAR