BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Make a Calendar//Week Number//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VEVENT
UID:mac-week-1981-W53@make-a-calendar.com
DTSTAMP:20260920T170538Z
DTSTART;VALUE=DATE:19811228
DTEND;VALUE=DATE:19820104
SUMMARY:ISO Week 53, 1981
DESCRIPTION:Monday–Sunday · 1981-W53 · Dec 28 – Jan 3, 1982
URL:https://make-a-calendar.com/week-number/1981/53
END:VEVENT
END:VCALENDAR