April is the fourth month of the year in the Gregorian calendar. He has 30 days and begins with the same week as the July and in leap years also as January. In the Roman calendar of Aprilis was originally the second month because with the end of winter began the new agricultural (and military) year in March.

There are no reliable derivation of the name. As the name of the first half of play gods, it could have come from Aphrodite, the goddess of love as would fit with April, even though the Roman name would have been Venus. The name may refer also to the opening buds in the spring and would be from the Latin aperire ( " open " ) derive. Another etymology looks apricus ( " sunny ") as the origin of the word. During the reign of Emperor Nero of the month was renamed in his honor in Neroneus which, however, not by sitting down. Under Emperor Commodus the month then was called Pius, one of the names of the emperors, also renaming this was reversed after his death. The old German name, which was introduced by Charlemagne in the 8th century, is Ostermond because Easter is usually in April. Others, now little more common names are changing month, Grass Moon or Launing.

According to legend, Lucifer was cast out of heaven on April 1.

Since the 16th century the custom is in Europe is to commit an April Fools joke on April 1 by " sends in April " his fellow men with a more or less coarse joke or a tall tale. Therefore, the following two proverbs come from:

" On April 1, they send the fool wherever you want. "

" In April, as everyone does what he wants. "

April weather is symbolic of changeable weather, even if it takes place in other months:

" April Fool's - does what he wants "