Mischievous ghost dingning April Fool's Day (April Fool 's day or all fools' day), also known as Wan Yu Festival, humor Festival, the origin of the festival vary, according to the degree of the mother, this is from the 19th century to the rise in the popular folk festivals in the west, it is not identified as a statutory holiday in any country. The Gregorian calendar year April 1st, people in a variety of ways to cheat each other and tease, often in the last...