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.[1]
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, so this is presumably the start-date of the calendar.[2]) As a reference, 2014 AD is 3180 YOLD (Year of Our Lady of Discord). While the abbreviation "YOLD" isn't used in the Principia, and the phrase "Year of Our Lady of Discord" is only mentioned once,[3] it is a Discordian tradition to use that designation.