Everyday Celebration · USA

Monkey Day

A lighthearted, unofficial holiday celebrating monkeys and primates, originating from an art school inside joke.

Mon, Dec 14, 2026
About

Monkey Day

Monkey Day, observed on December 14th, is a lighthearted, unofficial holiday celebrating monkeys and other primates, notable for its unusual origin as an inside joke between two art students, Casey Sorrow and Eric Millikin, at Michigan State University in the late 1990s, who reportedly began by drawing monkeys on a calendar in their studio as a running gag before eventually deciding to formally establish the observance. What began as a small, informal joke gradually gained wider recognition and participation online through Sorrow's continued promotion of the holiday, eventually growing into a recognized, if still lighthearted, unofficial observance embraced by zoos, primate sanctuaries, and animal enthusiasts worldwide. Primates represent one of the most diverse and intellectually fascinating orders of mammals, encompassing everything from small, nocturnal lemurs to great apes closely related to humans, and many species face significant conservation challenges due to habitat destruction, poaching, and the illegal wildlife trade. Zoos and conservation organizations frequently use Monkey Day as an opportunity to raise public awareness about primate conservation issues and to educate visitors about the remarkable cognitive abilities, complex social structures, and ecological importance of primate species around the world. The holiday's playful, low-stakes nature has helped it spread organically through social media and word of mouth, becoming a recognizable, if unofficial, addition to the calendar of quirky annual observances. Monkey Day is celebrated through zoo visits, primate-themed educational content, and general appreciation for monkeys and apes.

QuirkyFunAnimals
FAQ

Frequently Asked Questions

When is Monkey Day?

It is observed annually on December 14th.

How did Monkey Day originate?

It began as an inside joke between two Michigan State University art students, Casey Sorrow and Eric Millikin, in the late 1990s.

How do zoos participate in Monkey Day?

Many zoos and conservation organizations use the day to raise awareness about primate conservation and educate visitors about primate species.

Is Monkey Day an officially recognized holiday?

No, it remains an unofficial, lighthearted observance that spread organically through social media and word of mouth.

What Else Happened on Mon, Dec 14, 2026?

See historical events and other holidays and celebrations that share this date.

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