April Fools' Day is celebrated in different countries on April 1 every year. Sometimes referred to as All Fools' Day, April 1 is not a national holiday, but is widely recognized and celebrated as a day when many people play all kinds of jokes and foolishness. The day is marked by the commission of good-humoured or otherwise funny jokes and other practical jokes of varying sophistication on friends, family members, teachers, neighbors, work associates, etc.

Traditionally, in some countries such as Canada, New Zealand, the UK, Australia, Cyprus, and South Africa, the jokes only last until noon, and someone who plays a trick after noon is called an "April Fool" and taunted "April Fool's Day's past and gone, You're the fool for making one."