April Fools' Day (sometimes called All Fools' Day) is celebrated every year on 1 April by playing practical jokes and spreading hoaxes. The jokes and their victims are called April fools. People playing April Fool jokes expose their prank by shouting April Fool. Some newspapers, magazines, and other published media report fake stories, which are usually explained the next day or below the news section in small letters. Although popular since the 19th century, the day is not a public holiday in any country.
Geoffrey Chaucer's The Canterbury Tales (1392) contains the first recorded association between 1 April and foolishness.
As well as people playing pranks on one another on April Fools' Day, elaborate practical jokes have appeared on radio and TV stations, newspapers, web sites, and have been performed by large corporations. In one famous prank from 1957, the BBC broadcast a film in their Panorama current affairs series purporting to show Swiss farmers picking freshly-grown spaghetti, in what they called the Swiss Spaghetti Harvest. The BBC were later flooded with requests to purchase a spaghetti plant, forcing them to declare the film a hoax on the news the next day.
With the advent of the Internet and readily available global news services, April Fools' pranks can catch and embarrass a wider audience than ever before