Who doesn’t love pie? Who doesn’t love an excuse to eat more pie? Every year, math fans from around the world gear up to celebrate their favorite Pi related holiday. That’s right math fans and pie fans gear up every year to celebrate π. π is a magical number that is the ratio of a circle’s circumference to its diameter. Pi is an irrational number that has been calculated out to 2.7 trillion digits. Most Pi fans just go with 3.14 which stands for March 14. My favorite pi day was it 2015 when the date was 3.14.15 which happens to be the first 6 digits of pi. At 3.14.15 at 9:26 am, the first eight digits of pi were displayed on clocks. This event happens once an every 100-years. Here are 14 traditional pies from around the world to celebrate Pi day.