National Yellow Pig Day is observed on July 17 and is a holiday especially for the mathematicians of the world!
National Pig Day originated sometime during the early 1960s when two mathematicians named Michael Spivak and David Kelly analyzed the random properties of the number 17 and a mysterious yellow pig. It seems the process became excessive and professional. Kelly lectured and developed classes around it. Spivak published several mathematics texts. Pocket protectors for everyone!
I don’t remember learning that in school…
Photo Credit: Yellow Pig Day