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National Pi Day

Celebrate National Pi Day with a delicious slice of pie - from classic apple to decadent chocolate, there's something for everyone!
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When it is?
March 14
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United States

Get ready to celebrate National Pi Day on March 14th! This day honors the mathematical constant pi (π), which is used in calculations involving circles and other shapes. The number, which is 3.14159, was first discovered by ancient Babylonians around 2000BCE and has been studied ever since by mathematicians all over the world. On this special day, take some time to appreciate the beauty of mathematics and enjoy a delicious slice of pie!

History of National Pi Day

National Pi Day Dates

National Pi Day Timeline

<div class='timeline-item'><div class='timeline-left'><div class='timeline-date-text'>250 BC</div></div><div class='timeline-center'></div><div class='timeline-right'><div class='timeline-text timeline-text-title'>Early Calculation of Pi</div><div class='timeline-text'>Archimedes of Syracuse, an ancient Greek mathematician and engineer, was one of the first to calculate an accurate estimation of pi.</div></div></div><div class='timeline-item'><div class='timeline-left'><div class='timeline-date-text'>1706</div></div><div class='timeline-center'></div><div class='timeline-right'><div class='timeline-text timeline-text-title'>Introduction of Pi Symbol </div><div class='timeline-text'>The Greek letter "π" was first used to represent the mathematical constant by Welsh mathematician William Jones.</div></div></div><div class='timeline-item'><div class='timeline-left'><div class='timeline-date-text'>1897</div></div><div class='timeline-center'></div><div class='timeline-right'><div class='timeline-text timeline-text-title'>Pi Bill Failure</div><div class='timeline-text'>The "Indiana Pi Bill", which inadvertently suggested a value of pi to be 3.2, was introduced in Indiana. It failed to become law due to mathematicians' intervention.</div></div></div><div class='timeline-item'><div class='timeline-left'><div class='timeline-date-text'>1988</div></div><div class='timeline-center'></div><div class='timeline-right'><div class='timeline-text timeline-text-title'>Inception of Pi Day</div><div class='timeline-text'>Physicist Larry Shaw organized the first Pi Day celebration at the San Francisco Exploratorium.</div></div></div><div class='timeline-item'><div class='timeline-left'><div class='timeline-date-text'>2009</div></div><div class='timeline-center'></div><div class='timeline-right'><div class='timeline-text timeline-text-title'>Pi Day Recognition</div><div class='timeline-text'>Congress passes resolution 111, officially recognizing March 14 as National Pi Day in the United States of America.</div></div></div><div class='timeline-item'><div class='timeline-left'><div class='timeline-date-text'>Present</div></div><div class='timeline-center'></div><div class='timeline-right'><div class='timeline-text timeline-text-title'>Ongoing Celebrations</div><div class='timeline-text'>National Pi Day is now celebrated globally by mathematics enthusiasts. It includes activities like pie-eating, pie-throwing, and discussions about the mathematical constant.</div></div></div>

How to Celebrate National Pi Day

<div id='' class='facts-item'><div id='' class='facts-header'><h3 id='' class='facts-number'>1</h3></div><div id='' class='facts-text-wrapper'><h3 id='' class='facts-title'>Bake a pie</h3><p id='' class='facts-text'>Whether you prefer apple, cherry, peach or blueberry, National Pi Day is the perfect excuse to make your favorite pie from scratch. Get creative with your crust and add in some special ingredients to make it even more delicious.</p></div></div><div id='' class='facts-item'><div id='' class='facts-header'><h3 id='' class='facts-number'>2</h3></div><div id='' class='facts-text-wrapper'><h3 id='' class='facts-title'>Eat pi(e)</h3><p id='' class='facts-text'>Take advantage of all the Pie Deals offered on National Pi Day. Many restaurants and bakeries offer discounts on pies and other desserts.</p></div></div><div id='' class='facts-item'><div id='' class='facts-header'><h3 id='' class='facts-number'>3</h3></div><div id='' class='facts-text-wrapper'><h3 id='' class='facts-title'>Host a pi party</h3><p id='' class='facts-text'>Invite friends over for an afternoon or evening of celebrating all things pi. Serve up a variety of pies, play pi related games, watch movies about math or baking, and be sure to include some fun activities that have to do with the mathematical constant.</p></div></div><div id='' class='facts-item'><div id='' class='facts-header'><h3 id='' class='facts-number'>4</h3></div><div id='' class='facts-text-wrapper'><h3 id='' class='facts-title'>Learn pi</h3><p id='' class='facts-text'>Challenge yourself to memorize as many digits of pi as you can on National Pi Day. You can also learn about where this mathematical constant comes from and how it's used in real life.</p></div></div><div id='' class='facts-item'><div id='' class='facts-header'><h3 id='' class='facts-number'>5</h3></div><div id='' class='facts-text-wrapper'><h3 id='' class='facts-title'>Enjoy pie inspired activities</h3><p id='' class='facts-text'>On National Pi Day, get creative! Wear a pie shaped hat, read a book about baking pies, draw a picture of your favorite type of pie or create a paper mache model of pi.</p></div></div>

Why National Pi Day is Important

<div id='' class='whywelove-item'><div id='' class='whywelove-letter-cont'><div class='whywelove-letter'>A</div></div><div id='why-we-love-main-cont'><h3 id='' class='whywelove-title'>It celebrates mathematics and scientific discovery</h3><p id='' class='whywelove-text'>National Pi Day is a great opportunity to celebrate math and science. Not only does it honor the mathematical constant of pi (3.14), but it also serves as a reminder of the importance of mathematics in our everyday lives, from engineering to architecture to medical sciences.</p></div></div><div id='' class='whywelove-item'><div id='' class='whywelove-letter-cont'><div class='whywelove-letter'>B</div></div><div id='why-we-love-main-cont'><h3 id='' class='whywelove-title'>It recognizes the accomplishments of famous mathematicians</h3><p id='' class='whywelove-text'>Pi Day is also an excellent way to recognize and pay homage to the work of some of the world's most influential mathematicians and scientists, from ancient Greek philosophers like Pythagoras to more modern thinkers like Albert Einstein. It's a day for us to appreciate their contributions that have shaped our understanding of the world around us.</p></div></div><div id='' class='whywelove-item'><div id='' class='whywelove-letter-cont'><div class='whywelove-letter'>C</div></div><div id='why-we-love-main-cont'><h3 id='' class='whywelove-title'>It's a fun event for all ages</h3><p id='' class='whywelove-text'>Of course, National Pi Day isn't just about serious mathematics - it's also an opportunity for everyone to get involved in festive activities and enjoy some yummy treats! From eating delicious slices of pie to building pi structures out of paper, there's something for everyone on this special day.</p></div></div>

5 Fascinating Facts for National Pi Day

<div class='facts-item'><div class='facts-number-wrapper'><p class='facts-number'>1</p></div><div class='facts-core-content'><h3 class='facts-title'>The Digits of Pi are Infinite and Non-Repeating</h3><p class='facts-content'>Pi is an irrational number which means it cannot be expressed as a fraction and has infinite non-repeating digits after the decimal point. The pursuit of these digits has stimulated mathematicians for centuries.</p></div></div><div class='facts-item'><div class='facts-number-wrapper'><p class='facts-number'>2</p></div><div class='facts-core-content'><h3 class='facts-title'>Pi Day Coincides with Albert Einstein's Birthday</h3><p class='facts-content'>Albert Einstein, one of the most famous physicists in history, was born on March 14, 1879. This makes the celebration of Pi Day even more special for science enthusiasts.</p></div></div><div class='facts-item'><div class='facts-number-wrapper'><p class='facts-number'>3</p></div><div class='facts-core-content'><h3 class='facts-title'>A Challenge of Reciting Pi Digits</h3><p class='facts-content'>People worldwide challenge each other to recite as many digits of Pi as they can remember. The current Guinness World Record is over 70,000 digits, held by Rajveer Meena of India.</p></div></div><div class='facts-item'><div class='facts-number-wrapper'><p class='facts-number'>4</p></div><div class='facts-core-content'><h3 class='facts-title'>Pi is Used in Various Calculations Beyond the Circle</h3><p class='facts-content'>Although most renowned in relation to circles, pi is used in calculations related to other areas of mathematics and physics such as oscillation, wave mechanics and it's even used in Heisenberg’s uncertainty principle.</p></div></div><div class='facts-item'><div class='facts-number-wrapper'><p class='facts-number'>5</p></div><div class='facts-core-content'><h3 class='facts-title'>The Symbol for Pi has an Interesting Origin</h3><p class='facts-content'>The symbol for pi (π) originates from the Greek word for periphery or circumference, "περιφέρεια", and was first used by Welsh mathematician William Jones in 1706. </p></div></div>

National Pi Day FAQs

When is National Pi Day?

National Pi Day is celebrated on March 14 every year. In 2024 National Pi Day will occur on a Thursday.

National Pi Day Dates



Mar 14



Mar 14



Mar 14



Mar 14



Mar 14


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