April Fools' Day is celebrated on April 1st each year. It is a day when people play practical jokes and hoaxes on each other. The jokes and their victims are called "April fools." The origins of this day are unclear, but it has been observed for centuries in various cultures. Traditions vary around the world, with some countries having specific customs. For example, in France, children often tape a paper fish to someone's back as a prank. In Scotland, the day is celebrated for two days, with the second day focusing on more serious pranks.