Celebrate Pi Day!
It's the only holiday to honor a number: Pi Day, on 3-14, the beginning digits of the infinite, nonrepeating decimal expansion of $\pi$ = 3.1415926... As the ratio of a circle's circumference to its diameter, $\pi$ is irrational and transcendental--qualities sure to bring a twinkle to any mathematician's eyes. How are people celebrating Pi Day?
- Let's start with some music! Here's Noam Elkies' composition, Steganographic Étude #1, based on the first 244 digits of $\pi$, with an explanation.
- Who came up with Pi Day? Learn about the day's history.
- The 2021 Global Online Celebration of the International Day of Mathematics (IDM) is a project led by the International Mathematical Union. All talks, available in English, French and Spanish, will be streamed completely free and without any need to sign up.
- Take Math to Mars and Beyond with NASA's Pi Day Challenge.
- The Exploratorium in San Francisco hosts events every year.
- Check out these fun activities.
- National Council of Teachers of Math (NCTM) "Pi Day on Pinterest".
- Math Goodies offers lesson plans.
- College and university math departments such as University of Waterloo, Edinboro University, and St. Bonaventure University have fun on Pi Day.
- See Happy Pi Day video on YouTube. Dr Eugenia Cheng, from the University of Sheffield, explains what Pi is, what it's useful for, and demonstrates a trick to remembering it.
- Read more about Pi Day on AMS Blogs: The Pi Day Link Roundup of the Century, by Evelyn Lamb, Pi Day and Other Math Holidays, by Maya Sharma, and The Ubiquity of Pi Day: It’s Not Just for Math Geeks, by Edray Goins.
- Search Twitter for hashtag #PiDay to see lots more Pi Day celebrations around the world.
If your math department celebrates Pi Day let us know!
Email us at AMS Outreach
Photo courtesy of Kay Sweet: the first 13 digits of Pi (last displayed digit rounded).