BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Make a Calendar//Week Number//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VEVENT
UID:mac-week-1977-W1@make-a-calendar.com
DTSTAMP:20260920T181417Z
DTSTART;VALUE=DATE:19770103
DTEND;VALUE=DATE:19770110
SUMMARY:ISO Week 1, 1977
DESCRIPTION:Monday–Sunday · 1977-W01 · Jan 3 – Jan 9, 1977
URL:https://make-a-calendar.com/week-number/1977/1
END:VEVENT
END:VCALENDAR