July 17th is celebrated as Yellow pig day. You must be wondering what this Yellow pig day is. This holiday is dedicated to two mathematicians, Michael Spivak and David C. Kelly and the number 17.
The celebration of yellow pig day originated in early 1960’s by the mathematicians in college campus. It all started when Michael Spivak and David Kelly were given an assignment to analyze the property of number 17 when they were student at Princeton. They began finding out interesting properties about number 17 and in the process came up with mythical Yellow Pig which has 17 teeth, 17 toes, 17 eye lashes and so on.
Yellow Pig day is celebrated with much fanfare among mathematical society. Students wear T-Shirts based on mathematical themes with yellow pig on it. You can also celebrate the event by exchanging yellow pig gifts and other gifts based on mathematical themes. At Princeton, David Kelly gives a lecture on historical and mathematical property of number 17 and his collection of 289 (square of number 17) yellow pigs are kept on display. The celebration is concluded by singing yellow pig carols and eating yellow pig cakes.