National Yellow Pigs Day

July 17 is the day we celebrate Yellow Pigs Day (not to be confused with national pig day in March). Yellow Pigs Day is a mathematician's holiday celebrating yellow pigs and the number 17. It is celebrated annually since the early 1960's, primarily on college campuses, and primarily by mathematicians. On campus, Yellow Pig Cake and Yellow Pig Carols, along with parades and general revelry are tradition. The mythical yellow pig has 17 toes, 17 teeth, 17 eyelashes, etc. Incidentally, fear of the number 17 is called heptadecaphobia.