The original Roman calendar divided the year from March to December into 10 months of either 29 or 31 days, based on lunar ...

Finally, the calendar we all know was adopted by Pope Gregory XIII in 1582. After skipping 10 days in October 1582 to "catch up," it has changed little since then. What to know about February and ...

In 1582, Pope Gregory XIII reformed the calendar, dropping 10 days and making the equinox fall on March 21 again. Most Eastern Christians did not adopt the new calendar, leading to a situation ...

Celebrating the Week of Prayer for Christian Unity, Pope Francis reaffirmed the Catholic Church's willingness to accept a proposal for a common date for celebrating Easter in the ...

Eventually, the calendar we all know was adopted by Pope Gregory XIII in 1582, and it's changed little since then — not that the system is flawless. February gets a leap year once every four ...

A majority of Russian Orthodox churches worldwide use the Julian calendar, which celebrates Christmas on Jan. 7, instead of using the Gregorian calendar proposed by Pope Gregory XIII in 1582.

Pope Francis on Sunday called for a unified Easter date among Christian churches in the spirit of promoting unity. "It is a happy coincidence that Easter in this ecumenical Jubilee Year is celebrated ...

Pope Francis reaffirms Catholic Church's willingness to accept a common date for Easter in the West and East, highlighting ...