July 17th is Yellow Pig Day!

Today, July 17th, is Yellow Pig Day – a holiday celebrated by some mathematicians in recognition of the Yellow Pig and the number 17. According to Wikipedia, The Yellow Pig is believed to have originated with mathematicians Michael Spivak and David C. Kelly while they were students at Princeton University. They began listing interesting properties of the number 17, and somehow the 17-eyelashed yellow pig was born.

Check out some other math fun facts in honor of this holiday.

All images via ShutterStock and via.