APRIL FOOL’S DAY

In other countries is also called “poisson d'avril” (in French) and “pesce d'aprile” (In Italian).
April fool’s day is a culture holiday celebrated in the most of the western world, in countries like Italy, France, Germany, United Kingdom, Brazil, Portugal and United States.
This holiday is usually celebrated on April 1st , even Fools day is not a legal holiday, is recognized and celebrated as a day which tolerates practical or ‘heavy’ jokes and all kind of foolishness.
Traditionally, in some countries such as New Zealand, the UK, Australia, and South Africa, the jokes only last until noon, and someone who plays a trick after noon is called an "April Fool".
Elsewhere, such as in France, Ireland, Italy, South Korea, Japan, Russia, The Netherlands, Germany, Brazil, Canada, and the U.S., the jokes last all day.
ORIGINS
A lot of stories have given to explain how Fools day appear, but the version story, who tells that the jokes that people play to another begin in Carlos IX’s reign (France), is the most certain.
In XVI century people in France celebrated New Year since March 25th until April 1st, but on 1564 the king adopted the Gregorian calendar, so New Year celebration was moved to January 1st, but some people, who didn’t approve or simply forgot the change continued celebrating the holiday on April so the jokers took advantage of this situation for make some foolishness, so April Fool’s day started.
The name has given for zodiacal reasons.