A calendar notation in which the date is represented by one number. For example, the Julian date for December 11, 1942 is 2430705; while December 12, 1942 is 2430706. The Julian date is widely ...

These graphics explain why Easter Sunday changes each year based on ancient interpretations of the solar and lunar cycles.

Christians around the world will celebrate on the same day this year, a relative rarity. Pope Francis would like to make it ...