Though pranksters and joke-lovers in many countries now gleefully prepare to dupe friends and loved ones on April Fool's Day, no one knows exactly when or why, or even where, this tradition began.
A giddy spurt of practical joking seems to have coincided with the coming of spring since the time of the Ancient Romans and Celts, who celebrated a festival of mischief-making. The first mentions of an All Fool's Day (as it was formerly called) came in Europe in the Middle Ages.
Some trace April Fool's Day back to Roman mythology, particularly the story of Ceres, Goddess of the harvest, and her daughter, Proserpina.
Pluto, God of the Dead, abducted Proserpina and took her to live with him in the underworld. The girl called out to her mother, but Ceres could only hear the echo of her daughter's voice and searched for her in vain.
Such "fool's errands," or wild goose chases, became a popular practical joke in Europe in later centuries.