A Trusted Friend in a Complicated World

(3.)14 Ways to Celebrate Pi Day (Besides Eating a Big Slice of Pie!)

On March 14, celebrate this fascinating number and find more than one way to party like a mathlete

Our editors and experts handpick every product we feature. We may earn a commission from your purchases.

hand-written Pi numbers on green chalkboard.
domin_domin/Getty Images

How did Pi Day get started?

Every March 14 we gather our loved ones to crack pi jokes, take advantage of Pi Day deals and celebrate Pi Day, a holiday dedicated to…what is pi exactly? The short answer is when you divide any circle’s circumference by its diameter the answer is always approximately 3.14, or π. In 1988, physicist Larry Shaw decided this enigmatic number deserved its own holiday and started Pi Day, choosing March 14 to represent the first three digits of pi—and because it also happens to be Einstein’s birthday. Einstein did not discover pi but he had a thing for mathematical constants, and we’re sure he liked this one just fine.

There are plenty of other pi facts to discover as you learn more about this incredibly interesting number—and learn how to celebrate Pi Day.

senior man using a hula hoop while standing on the couch in his home.
Halfpoint/Getty Images

Do something irrational

Calling all unapologetic weirdos: Pi is an irrational number—meaning a real number that cannot be written as a fraction—so it makes sense to celebrate by not making sense. Wear your socks on your hands, eat dinner for breakfast, hand out Valentines or do any other weird, irrational thing that strikes your fancy!

close up tiger face eyes
Gypsy Picture Show/Getty Images

Watch an adventurous movie

Forget math and go for a different kind of pi by watching Life of Pi, an award-winning movie based on a book about a young man who survives a disaster at sea only to be thrown into an epic adventure with another survivor: a fearsome Bengal tiger. It’s perfect for a multigenerational Pi Day party, as there’s something in this story that will resonate with people of all ages and stages of life.

colorful toothpicks
OGphoto/Getty Images

Play a game of “pi toss”

The existence of π and an estimation of its value was discovered centuries before computers…but how? One way was via a technique called Buffon’s Needles, which involved throwing toothpicks. Learn how to play this simple game and “discover” pi with a tutorial from the Exploratorium museum, linked underneath the “sources” section of this article.

orange wood pencil with mathematical constant pi digits on white background
Justin Smith/Getty Images

Send a coded letter in Pilish

There’s a whole language made from the number pi, named “Pilish.” In Pilish, the length of words match the numbers as written in the sequence of digits in pi. Learning how to write in this elegant but elusive style is a must for pi lovers!

Pi Day Pizza. Homemade Pepperoni and Cheese Pizza for Pi Day Event, top view. Pepperoni positioning forms a pi symbol.
Mizina/Getty Images

Serve up a pizza pi(e)

Feeling more savory than sweet? Many pizzerias offer special Pi Day pizza specials with toppings in the shape of the famous symbol. Or you can make your own adorable and healthy fresh veggie pizza pi(e)s. If you’re feeling particularly punny, you can order a deep-dish pizza pie.

colorful tshirts hanging on a rack on wooden hangers
leolintang/Getty Images

Wear a punny shirt

An easy way to show both your love of math and your sense of humor is to celebrate Pi Day with a punny shirt. Some of our favorites: “Irrational but well-rounded” and this vintage pi t-shirt. Or come up with your own creative slogan and use fabric markers to design a shirt!

A distant camel caravan passes the majestic pyramids at Giza in Cairo at dusk. Egypt
oversnap/Getty Images

Challenge your friends with pi trivia

Did you know that the Great Pyramids of Giza were actually built on the principles of pi? Or that there’s a cologne named Pi that is marketed as increasing your intelligence? Now you know (in case they come up in future trivia games.)

mother and cute young son baking in the kitchen
M_a_y_a/Getty Images

Make pi cookies

Not a pie fan? Celebrate with Pi (or pie) cookies instead! If you’re fancy, make cookies that look like miniature pies. Or, you can make pi-shaped cookies. Just make sure you don’t make any of these baking mistakes.

Mediterranean style lunch table - turkey skewers, flatbread, tomatoes, cucumber salad, baked sweet pepper, yogurt herb sauce on a dark background, top view
OksanaKiian/Getty Images

Host a Greek feast

The first calculation of π was done by the famous Greek mathematician Archimedes of Syracuse (287–212 BC). To honor his genius and ingenuity—no calculators or computers then!—celebrate Pi Day with traditional Greek foods like gyros, (pita sandwiches), dolma (stuffed grape leaves), moussaka (an eggplant casserole) or souvlaki (meat skewers). And honey-soaked baklava is an excellent dessert if you’re looking for an alternative to eating pie.

pi on blackboard
sovika/Getty Images

See how many digits of pi you can memorize

As of 2022, π has been calculated to a whopping 100 trillion digits, according to Google. While that number of digits is far too much for the human mind to handle, you can probably memorize a lot more than you think—Akira Haraguchi holds the current world record for memorizing pi by reciting a mind-blowing 100,000 digits!

Female marching band member in full uniform on football field
Tom Fowlks/Getty Images

Start a pi parade

Normal parade routes usually go from point A to point B but on Pi Day it’s only fitting that it goes in a circle. Invite your friends and family to come decked out in their finest “pi” style, hold pi signs and march in a circle. End with—what else?—pie! Feel weird? Don’t. Find out about other unique celebrations held throughout America.

raspberry pi
jeesoen/Getty Images

Learn to code on a Raspberry Pi

A Raspberry Pi is a low-cost, credit-card-sized computer that plugs into a computer monitor or TV, and uses a standard keyboard and mouse. It’s tiny but it’s a fantastic intro to the world of coding, allowing people of all ages to learn how to program in languages like Scratch and Python, according to the Raspberry Pi Foundation. It’s capable of doing everything you’d expect a desktop computer to do, from browsing the internet and playing high-definition video to making spreadsheets, word-processing, and playing games.

3d infinity symbol
doguhakan/Getty Images

Explore infinity with a tricky craft

Pi is an infinite decimal, meaning that after the decimal point, the numbers go on forever. Infinity can be a tricky concept to understand, especially for kids. You can teach the concept of infinity and do a fun craft by making a Mobius strip out of paper with a different pattern or color on each side. Another option is to introduce kids to the mind-bending world of M.C. Escher and try to work your way through one of his infinite drawings.

Six years old girl close up, looking through binoculars.
Maica/Getty Images

Go on a π scavenger hunt

The symbol for pi, π, appears in a lot of places besides math textbooks! Since pi represents the ratio of a circle’s circumference to its diameter you can look for examples of perfect circles in your home, in nature, in art, in science, and in literature. You never realize how big a part pi plays in your everyday life until you start really looking for it. Now that you know how to celebrate Pi Day, brush up on more facts and learn why pi was almost changed to 3.2.


Charlotte Hilton Andersen
Charlotte Hilton Andersen is a health, lifestyle and fitness expert and teacher. She covers all things wellness for Reader’s Digest and The Healthy. With dual masters degrees in information technology and education, she has been a journalist for 17 years and is the author of The Great Fitness Experiment. She lives in Denver with her husband, five kids and three pets.