Monkey Day

Monkey Day is an unofficial holiday celebrated internationally on December 14.^[1][2][3] While the holiday is mainly about monkeys, it also celebrates other non-human^{[citation needed]} primates such as apes, tarsiers, and lemurs.The holiday was started in 2000 when artist Casey Sorrow, then an art student at Michigan State University, jokingly scribbled Monkey Day on a friend's calendar,^[5][6] and then first celebrated the holiday with other MSU art students.^[6] It gained notoriety when Sorrow and fellow MSU art student Eric Millikin began including Monkey Day in their artwork and Fetus-X comic strips, and began promoting it online along with other artists.^[7] Since then, Monkey Day has been celebrated internationally, across countries such as the U.S., Canada, Germany, and the United Kingdom.
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All details taken directly from provider content at http://en.wikipedia.org/wiki/Monkey_Day