BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Make a Calendar//Week Number//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VEVENT
UID:mac-week-1981-W15@make-a-calendar.com
DTSTAMP:20260920T170703Z
DTSTART;VALUE=DATE:19810406
DTEND;VALUE=DATE:19810413
SUMMARY:ISO Week 15, 1981
DESCRIPTION:Monday–Sunday · 1981-W15 · Apr 6 – Apr 12, 1981
URL:https://make-a-calendar.com/week-number/1981/15
END:VEVENT
END:VCALENDAR