April Fools' Day, also known as All Fools' Day, is observed annually on April 1st.
The exact origin of the holiday is unknown, but it has been celebrated for centuries in various cultures.
In France, the holiday is known as "Poisson d'Avril," which translates to "April Fish," and is celebrated by placing paper fish on people's backs.
The most common April Fools' Day prank is the "fake news" prank, where individuals create and share false news stories or headlines.
Other popular pranks include putting salt in the sugar bowl, setting someone's clock back an hour, and switching the contents of two similar-looking containers.
Some companies and organizations have also used April Fools' Day as a marketing opportunity by creating elaborate pranks and hoaxes.
Despite its playful nature, April Fools' Day has also been the source of controversy and criticism, with some arguing that pranks can be harmful and insensitive.