April Fools’ Day or All Fools’ Day is a day celebrated in various countries on April 1. The day is marked by the commission of hoaxes and other practical jokes of varying sophistication on friends, family members, enemies, and neighbors, or sending them on a fool’s errand, the aim of which is to embarrass the gullible.

Traditionally, in some countries, such as the UK, Australia, South Africa and parts of Canada, the jokes only last until noon, and someone who plays a trick after noon is called an "April Fool".