April Fool's Day

April Fools' Day
An April Fools' Day hoax marking the construction of the Copenhagen Metro in 2001
Also called	All Fools' Day
Type	Cultural, Western
Significance	Practical Jokes, Hoaxes
Observances	Comedy
Date	April 1
Next time	1 April 2017 (2017-04-01)
Frequency	Annual

April Fools' Day (sometimes called All Fools' Day) is celebrated every year on April 1 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 April 1 and foolishness.

The custom of setting aside a day for the playing of harmless pranks upon one's neighbor is recognized everywhere. Some precursors of April Fools' Day include the Roman festival of Hilaria.

In Chaucer's Canterbury Tales (1392), the "Nun's Priest's Tale" is set Syn March bigan thritty dayes and two. Modern scholars believe that there is a copying error in the extant manuscripts and that Chaucer actually wrote, Syn March was gon. Thus the passage originally meant 32 days after March, i.e. 2 May, the anniversary of the engagement of King Richard II of England to Anne of Bohemia, which took place in 1381. Readers apparently misunderstood this line to mean "32 March", i.e. April 1. In Chaucer's tale, the vain cock Chauntecleer is tricked by a fox.

In 1508, French poet Eloy d'Amerval referred to a poisson d’avril (April fool, literally "Fish of April"), a possible reference to the holiday. In 1539, Flemish poet Eduard de Dene wrote of a nobleman who sent his servants on foolish errands on April 1. In 1686, John Aubrey referred to the holiday as "Fooles holy day", the first British reference. On April 1, 1698, several people were tricked into going to the Tower of London to "see the Lions washed".