BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//time.now/holidays//NONSGML v1.0//EN
BEGIN:VEVENT
UID:2355a3c0-e6b3-46cf-b4af-d47ce7d9cf80
DTSTAMP:20260420T074857Z
DTSTART;VALUE=DATE:20211231
SUMMARY:Day off (substituted from 01/03/2021) (Russie)
END:VEVENT
END:VCALENDAR