Pi Approximation day is a similar holiday, celebrated on July 22 (from the approximation 22/7). [http://www.usatoday.com/tech/science/mathscience/2007-03-14-pi-day_N.htm] | Pi Approximation day is a similar holiday, celebrated on July 22 (from the approximation 22/7). [http://www.usatoday.com/tech/science/mathscience/2007-03-14-pi-day_N.htm] |