April Fools' Day is an annual custom on April 1 consisting of practical jokes and hoaxes. Jokesters often expose their actions by shouting "April fools" at the recipient. There are many disputed origins between April 1 and foolishness, but playing harmless pranks upon one's neighbor has been relatively common in the world, historically. It’s only a public holiday in Odessa, Ukraine. People there observe "Humorina" by dressing up in costumes and fooling around, while pranking others passing by.
