On 1 April, people play practical jokes on each other. An explanation has much greater historical validity. It relates to the adoption of the modern calendar and the fact that, until the sixteenth century, New Year's Day was celebrated on 25 March. It frequently happened that this very day, so jolly and happy, fell during Passion Week, and sometimes even coincided with Good Friday itself. To avoid such an unfortunate circumstance, the authorities postponed the traditional New Year celebrations to 1 April.
Old habit die hard.
They forgot all about the new New Year. Taking advantage of their confusion, jokers made fun of them. There have been many explanations for this special day. It is a day reserved for laughter. But tradition also demands that all hoaxing must cease at noon.