BEGIN:VCALENDAR
NAME:US Holidays
PRODID:-//CalMerge//Calendar Merger 1.0//EN
VERSION:2.0
CALSCALE:GREGORIAN
BEGIN:VEVENT
UID:20231225T000000-001@example.com
DTSTART;VALUE=DATE:20231225
DTEND;VALUE=DATE:20231226
DTSTAMP:20231225T000000Z
SUMMARY:Christmas Day
END:VEVENT
END:VCALENDAR