It's still a direct astronomical observation. Easter is considered the most important date on the Christian calendar — sorry Christmas — but unlike its counterpart, the holiday changes dates every ...

TAYLOR, Pa. -- For Orthodox Christians who follow the Julian calendar all around the world, January 7 is Christmas Day. People gathered inside St. George's Orthodox Church in Taylor for a special mass ...

ST CLAIR, Pa. — Hearing "Merry Christmas" a week into January might sound odd for some, but not for folks at St. Michael the Archangel Orthodox Church in St. Clair. "It is a necessary celebration to ...

The rare date Feb. 29 is coming up − and though it only crops up every four years, it is indeed real. But what about Feb. 30 or March 32? Sorry, folks. Those are ...

David Sim is the Associate Picture Editor at Newsweek (London). His responsibilities include managing the website's image gallery content and producing captivating photo reports on global news events.

For something that’s meant to lend order to our lives, the modern Western calendar has a messy history. The mess, in part, comes about because of the difficulty of coordinating the orbits of celestial ...

The Gregorian calendar is the calendar used by most of the world. Also called the "Christian calendar" or "Western calendar," it is internationally accepted as a civil calendar by all but a handful of ...

The Western world celebrates New Year's Day on the first of January, though that was not always the case, and it took at least two major calendrical reforms in as many millennia to cement Jan. 1 as ...