BEGIN:VCALENDAR
VERSION:2.0
METHOD:PUBLISH
PRODID:-//PinCalendar.com -  Example Calendar  //EN
BEGIN:VEVENT
UID:1513
DTSTART:20161108T180000Z
DTEND:20161108T180000Z
DTSTAMP:20260517T062027
SUMMARY:Custom Button
URL:https://www.pincalendar.com/example/calendar/calendar23110/event/1513/
 ?q=ical
END:VEVENT
END:VCALENDAR