Who Was Pope Gregory XIII? Meet Man Behind Your New Year Celebrations; Your Party Planner From 443 Years Ago​on January 1, 2026 at 6:52 am

Happy New Year 2026: The Gregorian calendar, followed across most of the parts of world today, was introduced more than 400 years ago by Pope Gregory XIII. Happy New Year 2026: The Gregorian calendar, followed across most of the parts of world today, was introduced more than 400 years ago by Pope Gregory XIII.