Gallic humor calls for the traditional joke is pinning a fish - these days a picture - on another's back. When it's discovered they yell 'Poisson d'Avril'
Although the origins of April Fools is obscure and debated, the most widely accepted explanation actually credits the April Fools as starting in France. The most popular theory about the origin involves the French calendar reform of the sixteenth century.
Today a common prank - not only among school-aged children - is to place a paper fish on the back of an unsuspecting person. When the paper fish is discovered, the victim is declared a “Poisson d’Avril.”
While it is not clear of the origins of fish being associated with April 1, many think the correlation is related to zodiac sign of Pisces (a fish), which falls near April.
If you are looking for an easy way to prank your friends or family, doodling or cutting out a paper fish and sticking it on the back of an unsuspecting victim is an easy way of commemorating the origins of April Fools’ Day.
Of course as someone who enjoys France in large part because of all the amazing food, my personal favorite part about Poisson d’Avril are the plethora of bakeries and cholocatiers that make fish shaped pastries and chocolates in honor of the holiday.