Most of you may be aware of date command. There is also a ddate command. It converts Gregorian dates to Discordian dates or Erisian calendar, which is an alternative calendar used by some adherents of Discordianism. It is specified on page 00034 of 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, 3173 YOLD is January 1, 2007 Gregorian.
Just type ddate:
Today is Setting Orange, the 71st day of Bureaucracy in the YOLD 3173
For fun put following alias in /etc/profile (try out on 1st April ;) ):
If called with no arguments, ddate will get the current system date, convert this to the Discordian date format and print this on the standard output.. Alternatively, a Gregorian date may be specified on the command line, in the form of a numerical day, month and year.