BEGIN:VCALENDAR
VERSION:2.0
PRODID:icalendar-ruby
CALSCALE:GREGORIAN
BEGIN:VTIMEZONE
TZID:America/Denver
BEGIN:DAYLIGHT
DTSTART:20260308T030000
TZOFFSETFROM:-0700
TZOFFSETTO:-0600
RRULE:FREQ=YEARLY;BYDAY=2SU;BYMONTH=3
TZNAME:MDT
END:DAYLIGHT
BEGIN:STANDARD
DTSTART:20261101T010000
TZOFFSETFROM:-0600
TZOFFSETTO:-0700
RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=11
TZNAME:MST
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTAMP:20260418T085619Z
UID:03b0271b-7283-4afc-ba25-19b3c31390ad
DTSTART;VALUE=DATE:20260201
DTEND;VALUE=DATE:20260523
DESCRIPTION:Classes with the best attendance earn treats every week. Please
  encourage your student to be to school unless they are ill. Thank you!!
LOCATION:
SUMMARY:Attendance challenge 
END:VEVENT
END:VCALENDAR