On this day, February 29, conversations the world over may conjure the name of Pope Gregory XIII – widely known for his reform of the calendar that bears his name. The need for calendar reform was ...

On Tuesday, we will certainly celebrate the New Year’s Day for the year 2013, arguably the most international of all festivals. What people do not always recognize is that the date of Jan. 1 for New ...

The Gregorian calendar, followed across most of the parts of world today, was introduced more than 400 years ago by Pope ...

ROME (AP) — Pope Gregory XIII, the 16th century pontiff responsible for what is today known as the Gregorian calendar, now has another, celestial claim to fame. A working group of the International ...

This week is significant, for religious reasons it has not always existed. It was in 1582, Pope Gregory XIII instituted a major reform of the calendar, which has since been almost universally adopted.

We're all Gregorians now. But it took a while. On New Year's Day, just about every corner of the world will flip a calendar in accordance with the system commissioned by Pope Gregory XIII in the 1580s ...

Thursday, Feb. 29 is leap day — that's something you don't hear very often. Here’s what you need to know about the day that happens almost every four years. 🗓️ What is a leap year? A leap year is ...

ROME -- Pope Gregory XIII, the 16th century pontiff responsible for what is today known as the Gregorian calendar, now has another, celestial claim to fame. A working group of the International ...