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

For example, the Julian date for December 11 ... Contrast with "Gregorian date," which is the common calendar notation of month, day and year. THIS DEFINITION IS FOR PERSONAL USE ONLY.

S ome years seem to zip by in the blink of an eye, while others seem to drag on for far longer. But some, like leap years, ...

The simplest way to explain why Easter falls on a different date each year is this: It falls on the first Sunday after the full moon that follows the spring equinox.

It is with this addition that the numbered names no longer aligned with the position of the months. Next came the Julian Calendar, established under the rule of Julius Caesar, based on the 12 ...

“In the Julian Calendar, as in the Hindu calendar, the new year began with the spring equinox around April 1,” the History Channel says. “People who were slow to get the news or failed to ...

According to the Farmer's Almanac, Easter is a movable feast. With the Gregorian calendar, it is celebrated between March 21 and April 25. In the Eastern Orthodox Church, which uses the Julian ...