What is an April fool?
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http://www.museumofhoaxes.com/aforigin.html you will find all the answers about April fools on this site their are many different theories as to where it originated from enjoy the page.
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Because having the year start in January is relatively recent, and has to do with centering the calendar around Christ. In pagan cultures, like the Greeks who created Astrology, the vernal equinox was the beginning of the new year. This usual fall on or about March 21, so April 1 was the New Year Day. After the calendar change, Christians called all OLD believers fools. Hence "April Fools Day". If you don't believe it, look it up!
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I think Beltane or May Day is the Pagan New Year or Halloween.\n Per All Knowing Wikipedia.org:\n"The origin of this custom has been much disputed, and many theories have been suggested, e.g. that it is a farcical commemoration of Christ being sent from Annas to Caiaphas, from Caiaphas to Pilate, from Pilate to Herod, and from Herod back again to Pilate, the crucifixion having taken place about the 1st of April.\n\nWhat seems certain is that it is in some way or other a relic of those once universal festivities held at the vernal equinox, which, beginning on old New Year's day, the 25th of March, ended on the 1st of April.\n\nIt has been suggested that Europe derived its April-fooling from the French [1]. They were the first nation to adopt the reformed Gregorian calendar, Charles IX in 1564 decreeing that the year should begin with the 1st of January. Thus the New Year's gifts and visits of felicitation which had been the feature of the 1st of April became associated with the first day of January, and those who disliked or did not hear about the change were fair game for those wits who amused themselves by sending mock presents and paying calls of pretended ceremony on the 1st of April. However, it is unlikely that this explanation of April Fool's Day’s origin is correct. Well before 1582, when King Charles IX of France brought in the new Gregorian calendar, French and Dutch references from respectively 1508 and 1539 describe April Fool's Day jokes and the custom of making them on the first of April.\n\nThough the 1st of April appears to have been anciently observed in Great Britain as a general festival, it was apparently not until the beginning of the 18th century that the making of April-fools was a common custom. In Scotland the custom was known as "hunting the gowk," i.e. the cuckoo, and April-fools were "April-gowks," the cuckoo being there, as it is in most lands, a term of contempt. In France the person fooled is known as poisson d'avril. This has been explained from the association of ideas arising from the fact that in April the sun quits the zodiacal sign of the fish. A far more natural explanation would seem to be that the April fish would be a young fish and therefore easily caught.\n\nThe Dutch have their own reason. Back in 1572, the Netherlands were still ruled by Spain's King Phillip II. There were roaming Dutch rebels who called themselves Geuzen, after the French "gueux", meaning beggars. On April 1, 1572, they took a small coastal town called Den Briel. This event was also the start of the general civil rising against the Spanish in other cities in the Netherlands. General Alva of the Spanish army could not do much. Bril is the Dutch word for glasses, so on April 1, 1572, "Alva lost his glasses". Dutch people find this joke so hilarious they still commemorate the first of April."
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That's mad! I managed not to think of anything funny and the best I did was to fall off of my chair and pretend to knock myself out on something at half midnight when I was still up. I was gonna jump up after a while and yell April fool, but I ended up laughing as the rest came over to see what happened, so it all went pathetically wrong. well done. Very classy.
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A wise person watches others, and learns from thier mistakes. A fool makes mistakes, and doesn't learn from them
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HAVE YOU HEARD OF THE BIRDS AND THE BEES FOOL????
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it's a combination of two phrases actually. It combines the phrase "cutting up" which means to clown around with the phrase "act a fool" which simply means to act like afool.
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this is a good way to keep a fool busy. this one is excellent!
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definately, why not play a April Fools joke?
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A fool and his money are soon parted?
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Abril...it should be sometime during april, o tambien mayo
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It's a joke word invented by the 18th c. English poet  William Shenstone, to poke fun at people who use long pompous Latinate words.  That it means (as Jennie says) valuing as worthless redoubles the irony.
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Great joke. Sucked me right in. I am a Happy April Fool!!!!!!!
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Well, if it is making a fool of you, it is making a fool of me too!  I don't think this is a game.  I think it is fun!
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A person regarded as silly, foolish, or stupid.
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a fool report you for nothing
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Well, it is April Fools Day....it's probably a joke.\nI hope!