January 5 is the Discordian Holyday of Mungday. The Discordian calendar is divided into five seasons with a Holyday falling on the fifth day of each season to honor the “5-star” saints of Discordianism. Mungday honors the ancient Chinese sage Hung Mung.

Sources:
http://www.revjack.com/jack/mung.html
http://discordia.wikia.com/wiki/Calendar
http://en.wikipedia.org/wiki/Hung_Mung

↓ Transcript
Fact of the Day
January 5 is Mungday- a holy day in the Discordian religion that religion that honors the five-star saint Hung Mung.
Hung Mung answered questions of philosophy by slapping his leg and saying, "I don't know"