April Fools' Day is widely known as a time for jokes and hoaxes, but exactly why do these traditionally take place on April 1 is a bit a baffling mystery.

The online world got an April Fools' Day makeover as YouTube rolled out 1911 viral videos and the Huffington Post put up a mock pay wall. Lighthearted pranks are an annual Web tradition on April Fools ...

People have always been stymied about the origins of April Fools' Day, dating all the way back to the late Middle Ages (as far as academics could confidently say). In 1760, the parody periodical Poor ...