Mad Hatter Day is celebrated on October 6th of each year. It began in Boulder, Colorado in 1986 by a group of computer folk who had nothing better to do. It was immediately recognized as valuable because they cause less damage than if they had been doing their jobs. It was announced that first year on computer networks.
In 1987 it gained minor local recognition. In 1988, it was first recognized as an official holiday by an area business and also received its first national press coverage by news services. It is almost certain that the national election also gave Mad Hatter Day a good boost in 1988. (Carnegie Mellon, School of Computer Science)