Unicorn Day
Unicorn Day is a reference to May 9th, 2011, where Mike Morhaime is slated to speak at the Activision|Blizzard conference call and speak of the Diablo III beta.
Naming the Day
It is named "Unicorn Day" after the long, industrious journey of the unicorn into Diablo consciousness, due in part to the art controversy, Bashiok posting images of farting unicorns, fan speculation of a secret unicorn level, Flux spurring on such debate, and a host of other sources.
History
February 9th, 2011, Activision Blizzard held a conference call where Mike Morhaime spoke of Diablo III and had this to say[1]:
A feverish excitement for the beta test of Diablo III ensued, spawning multiple threads across both the diablo.incgamer's forums, the battle.net forums, major media websites and other fansites around the internet.
The fever was later spurred on by @Diablo who posted the following tweet [2]:
It was generally assumed that the "5,911 points" was in reference to the date of Unicorn Day, May 9th, 2011.
- See the beta page to learn more about the Diablo III beta, including speculation and how to enter the random lottery for a beta key.