BEGIN:VCALENDAR
VERSION:2.0
PRODID:icalendar-ruby
CALSCALE:GREGORIAN
BEGIN:VEVENT
DTSTAMP:20260519T112345Z
UID:1766c01d-2ada-4cc2-8ecb-c93d3f3579d8
DTSTART;VALUE=DATE:20260309
DTEND;VALUE=DATE:20260310
SUMMARY:Cohort #2 Starts
END:VEVENT
END:VCALENDAR