BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//time.now/holidays//NONSGML v1.0//EN
BEGIN:VEVENT
UID:68d31b5d-afd9-4885-85ce-84abadff2dae
DTSTAMP:20260420T075014Z
DTSTART;VALUE=DATE:20210503
SUMMARY:Day off (substituted from 05/01/2021) (Russie)
END:VEVENT
END:VCALENDAR