The origin of April Fool's Day remains a mystery . Basically no one knows exactly where, when, or why the celebration began. What is known is that references to 'All Fool's Day', what April Fool's Day was originally called, began to appear in Europe during the late Middle Ages and was a folk or peasant celebration. It involved dancing, drinking, and general merrymaking. A mock king was chosen to reign for the day and was called the Lord of Misrule.
British folklore links April Fool's Day to the town of Gotham, the legendary town of fools located in Nottinghamshire. According to the legend, it was traditional in the 13th century for any road that the King placed his foot upon to become public property. So when the citizens of Gotham heard that King John planned to travel through their town, they refused him entry, not wishing to lose their main road. When the King heard this, he sent soldiers to the town. But when the soldiers arrived in Gotham, they found the town full of lunatics engaged in foolish activities such as drowning fish or attempting to cage birds in roofless fences. Their foolery was all an act, but the King fell for the ruse and declared the town too foolish to warrant punishment.