The Discordian or Erisian calendar is an alternative calendar used by some adherents of Discordianism. It is specified on page 00034 of the Principia Discordia. The Discordian year 1 YOLD is 1166 BC. (Elsewhere in the Principia Discordia, it is mentioned that the Curse of Greyface occurred in 1166 BC. As a reference, AD is YOLD (Year of Our Lady of Discord). The abbreviation "YOLD" is not used in the Principia, though the phrase "Year of Our Lady of Discord" is mentioned once. Composition As described in the Principia Discordia, the Discordian calendar has five 73-day seasons: Chaos, Discord, Confusion, Bureaucracy, and The Aftermath. The Discordian year is aligned with the Gregorian calendar and begins on January 1, thus Chaos 1, YOLD is January 1, Gregorian. The Erisian week consists of five days: Sweetmorn, Boomtime, Pungenday, Prickle-Prickle, and Setting Orange. The days of the week are named after the five basic Discordian elements: Sweet, Boom, Pungent, Prickle, and Orange. There are 73 of these weeks per year and every year begins with Sweetmorn. Every fourth year in the Discordian calendar, starting in 2 YOLD, an extra day is inserted between Chaos 59 and Chaos 60 called St. Tib's Day. This is because 4 years + 1 day = 5, a holy number, but the Discordian leap year also coincides with the Gregorian one. The result of this is that any given day of the year in the Discordian calendar may be taken to correspond to the same day of the year in the Gregorian calendar, and vice versa, although some users of the calendar believe that it is tied to the Julian calendar and so will diverge from the Gregorian in 3266 YOLD (AD 2100). St. Tib's Day is considered outside the Discordian week. There are Apostle Holydays on the 5th day of each season, named after the 5 Discordian apostles: Mungday, for Hung Mung; Mojoday, for Dr. Van Van Mojo; Syaday, for Sri Syadasti; Zaraday, for Zarathud; and Maladay, for Malaclypse the Elder. There are also Season Holydays on the 50th of each season: Chaoflux, Discoflux, Confuflux, Bureflux, and Afflux. Only these eleven dates are named in the Principia Discordia; however, Discordians have felt free to invent other holidays which have become popular to varying degrees. Some of these include Discordians for Jesus/Love Your Neighbor Day (March 25/Discord 11); Jake Day (April 6/Discord 23 or occasionally May 23/Discord 70),