April 1 this Day is not brought in any calendars of significant dates and national holidays, but it successufuly is celebrated both in Russia, Azerbaijan and other post soviet countries, and in Germany, France and even in the East. In one countries on April, 1 name Day of laughter, in others - Day of the fool. But who the first has thought up this holiday? How to play the friends, fellow workers and it is simple passers-by? How to celebrate this Day at school? What draws are most popular: mass, telephone, or computer? And also: a comic all-prize lottery, fun SMS and messages for an answering machine, focuses, gigs from a life, game, competitions, virtual cards and comic scripts by April 1! It is difficult to tell, where this holiday came from. Custom to have fun, joke and deceive each other on April, 1 exists in very many countries. About occurrence of April Fools’ tradition there are many the various hypotheses converging in one: roots of it deeply leave in medieval European carnaval culture. As a matter of fact it is one of the most proof elements of ancient period, settled in Christian consciousness. And weight one attribute origin of this holiday to Ancient Rome, where in the middle of February (and at all in the beginning of April) the holiday of “Silly” was celebrated. Under one version, the custom to joke on April 1, is connected to carry of new year. Till second half XVI century, the european new year began at the end of March. For this event prepared, visited to each other, gave gifts. The meeting of New year occured on April, 1. Later, under the decree of the French king, the beginning of year officially began to mark on January, 1, but many citizens continued to celebrate on April, 1. To get rid old traditions, them began to name « April Fools’ fools », began fashionable them to play and deride. Presumably more than 70 % of people are going to play somebody from familiar. So be on the lookout, be reserved by sense of humour, a set fresh jokes and amusing rhymes, at draws do not take offence, and answer them. In general, have fun, because laughter, as is known, prolongs a life.