Pi Day

Pi Day Quick Facts in CA

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2025 DateMarch 14, 2025
2026 DateMarch 14, 2026

Pi Day

Pi Day in

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Pi Day History

Pi Day celebrates the mathematical constant represented by the Greek letter π. In mathematics and physics, Pi, approximately 3.14, is a fundamental concept that represents the ratio of a circle's circumference to its diameter, consistent no matter the size of the circle. Pi Day not only pays tribute to this vital constant, but also serves as an opportunity to engage students and the general public in math-related activities like pie-eating on a day that loosely represents the constant.

The concept of Pi Day was first proposed by physicist Larry Shaw in 1988 at the San Francisco Exploratorium. In Canada, the mathematical day has been embraced enthusiastically by mathematicians, teachers, students, and anyone appreciating the interplay between mathematics and the world. Many Canadian educational institutions and organizations mark Pi Day, given the country's emphasis on scientific and mathematical education. It's seen as an exciting opportunity to spark interest in these crucial subjects among students and adults alike.

In Canada, Pi Day is typically observed through educational events, discussions about the significance of Pi, and math-themed contests. It's become a tradition in some schools to serve pie on Pi Day, playing on the homophonic nature of the word "pi" and "pie". While circled learning sessions celebrate the day's circular theme, students often engage in activities geared towards calculating Pi. As per its mathematical origin, this day is observed every year on March 14, connecting to the approximation of pi, 3.14.

Facts about Pi Day

  • In 2015, at 9:26:53 (AM and PM), all of the first ten digits of Pi (3.141592653) were present in the date and time.
  • Pi is an irrational number, meaning it cannot be expressed properly as a fraction.
  • Albert Einstein, widely referred to as the father of modern physics, was born on March 14, 1879. Therefore, Pi Day also recognizes Einstein's birthday.
  • 26:53 was sequentially corresponding to the first ten digits of pi (3.141592653).
  • Several Canadian mathematicians, like Jonathan Borwein and Peter Borwein, have conducted extensive research on the computation of Pi. They utilized computer programs to compute Pi to millions of digits

Top things to do in Canada for Pi Day

  • Memorize as many digits of Pi as you can (remember, the World Record Holder was able to memorize 70,000 decimal places of pi).
  • Eat a pie to celebrate Pi day and earn bonus points if your can calculate Pi for your pie's circumference! Here are some twists on traditional pies that you can try:
    1) Avocado and cream cheese pie
    2) Cheeseburger and pickle pie made from ground beef, cheese, and chopped dill pickles
    3) Mac and Cheese Pie topped with bacon
    4) Hot dog pie covered with a layer of cheese
    5) Twinkie pie topped with whipped cream
  • Practice your geometry and algebra equations that contain the constant Pi. Here are some useful formulas to help you:
    Circumference of a circle = 2 πr
    Area of a Circle = π r^2
    Volume of a Cylinder = π r^2h
    where r=radius and h=height
  • Visit the Ontario Science Centre: They usually have events on Pi Day including interactive displays and demonstrations that teach more about the beauty of math and the significance of the number pi.
  • Attend Pi Day at Discovery Centre: Located in Halifax, the Discovery Centre often plans a day of learning and fun where people can explore math and science in an innovative way. Activities can include pie eating contests, mathematical games, and even chances to throw pies at staff.

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