Event Brief
Dec 29, 2025 at 6:03 AM ET
Why Do We Celebrate New Year on January 1?
By The BriefBrief
Exploring the origins of the January 1 New Year celebration linked to the Gregorian calendar.
WHO: Pope Gregory XIII
WHAT: Introduction of the Gregorian calendar
WHEN: Dec 28, 2025 at 7:00 PM ET
WHERE: Roman Empire
WHY: To integrate various cultural ideas into a unified calendar system
How this brief is built: The BriefBrief correlates multiple sources into one evolving event brief, updated as new facts emerge.
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