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

Here's everything you should know about April Fools' Day, including how it started and some of the most infamous pranks.

People Are Sharing Their Hilarious Fails From Last Week, And These 24 Made Me Laugh So Hard I Snorted ...

What is it about the first day of April that brings out the prankster, or the fool (you know who you are) in us?

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.

The day is celebrated on the first of April each year and is known as that one day when people can engage in pranks, as it is ...

Another popular theory links the tradition to the 16th-century calendar reforms. Pope Gregory XIII ordered Christian nations to adopt the Gregorian calendar in 1582, officially shifting New Year ...