is an unoffical holiday
celebrated internationally on December 14
. The holiday is primarily celebrated with costume parties intended to help draw attention to issues related to simians
, including medical research, animal rights, and evolution
. The holiday also cuts across religious boundaries and provides opportunities to share monkey stories.
The holiday was created in 2000 by art students at Michigan State University, including Casey Sorrow, then artist of the popular comic Fetus-X. There has been an annual Monkey Day Web Comic Marathon since 2004 with comics including Rob Balder's PartiallyClips, David Malki's Wondermark, Eric Millikin's Fetus-X, and Sorrow's own Feral Calf.
In 2005, Peter Jackson's King Kong was released on the fifth anniversary of Monkey Day.