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Tau Day

Celebrate Tau Day and honor the mathematical constant - celebrate its beauty with puzzles, games, and activities!
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When it is?
June 28
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Mark your calendars for June 28th and get ready to celebrate Tau Day! This day is dedicated to the mathematical constant tau, which is equal to 2π. It was first proposed in 2001 as an alternative to Pi Day (March 14th), which celebrates the ratio of a circle's circumference to its diameter. Since then, it has been adopted by mathematicians around the world who have embraced tau’s simplicity and elegance. So join us in celebrating this wonderful day with fun activities and mathematical puzzles that are sure to challenge your brain!

History of Tau Day

Tau Day Timeline

<div class='timeline-item'><div class='timeline-left'><div class='timeline-date-text'>1800s</div></div><div class='timeline-center'></div><div class='timeline-right'><div class='timeline-text timeline-text-title'>Pi Emerges as a Constant</div><div class='timeline-text'>Pi, the ratio of a circle's circumference to its diameter, becomes a common mathematical constant in calculations and theoretical works.</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'>Pi Day Celebration Begins</div><div class='timeline-text'>The first large-scale celebration of Pi Day is organized by physicist Larry Shaw at the San Francisco Exploratorium.</div></div></div><div class='timeline-item'><div class='timeline-left'><div class='timeline-date-text'>2001</div></div><div class='timeline-center'></div><div class='timeline-right'><div class='timeline-text timeline-text-title'>Tau is Proposed</div><div class='timeline-text'>Bob Palais publishes "π Is Wrong!" introducing tau (τ) as 2π, arguing that it is a more intuitive and useful constant when performing calculations involving circles and angles.</div></div></div><div class='timeline-item'><div class='timeline-left'><div class='timeline-date-text'>2010</div></div><div class='timeline-center'></div><div class='timeline-right'><div class='timeline-text timeline-text-title'>Tau Manifesto</div><div class='timeline-text'>Michael Hartl publishes "The Tau Manifesto," advocating for the use of tau instead of pi. Later the same year, he organizes the inaugural Tau Day on June 28.</div></div></div><div class='timeline-item'><div class='timeline-left'><div class='timeline-date-text'>Present Day</div></div><div class='timeline-center'></div><div class='timeline-right'><div class='timeline-text timeline-text-title'>Global Tau Day Celebrations</div><div class='timeline-text'>Each year on June 28, mathematicians and enthusiasts around the world celebrate Tau Day with activities, puzzles, and discussions on the merits of using tau over pi in calculations involving circles.</div></div></div>

How to Celebrate Tau 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'>Organize a Pi and Tau party</h3><p id='' class='facts-text'>Invite your friends over for a Pi and Tau party. Have games and activities that combine both numbers in some way. Make sure to have plenty of delicious pies and tau-shaped cookies.</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'>Create Tau-themed art</h3><p id='' class='facts-text'>Grab some paints or markers and get creative! Paint or draw pictures of the tau symbol, or make an abstract piece inspired by its shape. You could even create a 3D model of it out of clay.</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'>Watch a movie about maths</h3><p id='' class='facts-text'>Gather the family around the TV and watch a movie about maths. This could be anything from The Imitation Game to Good Will Hunting. Enjoy learning more about the wonders of mathematics.</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'>Read up on its history</h3><p id='' class='facts-text'>Learn more about the history of the tau symbol; its origins, who first used it, why it was chosen, etc. You can find lots of information online or in books.</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'>Compete in a tau quiz</h3><p id='' class='facts-text'>Challenge your friends and family to a tau quiz! Put together a set of questions about its history, maths, or even pop culture references to the symbol and see who comes out on top.</p></div></div>

Why Tau 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'>Tau Day celebrates mathematical advances</h3><p id='' class='whywelove-text'>Tau Day is a special day that is celebrated every year on June 28th to recognize and celebrate the importance of the number τ (tau). τ is a mathematical constant which is equal to 2π (it is sometimes abbreviated as t). This number plays an important role in many mathematical fields including calculus, trigonometry, and geometry.</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'>Tau Day promotes STEM education</h3><p id='' class='whywelove-text'>By introducing young students to τ through Tau Day, people are encouraging a greater appreciation for STEM topics like mathematics. This encourages more people to pursue careers in these areas and helpsscientists and mathematicians elevate their field even further.</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'>Tau Day encourages curiosity</h3><p id='' class='whywelove-text'>By observing Tau Day, people are reminded of the fascinating world of mathematics and encouraged to explore its mysteries further. It's also a great chance for anyone interested in math to learn something new by researching or discussing mathematical concepts with fellow enthusiasts!</p></div></div>

5 Fascinating Facts You Didn't Know About Tau Day

Tau Day FAQs

When is Tau Day?

Tau Day is celebrated on June 28 every year. In 2024 Tau Day will occur on a Friday.

Tau Day Dates



Jun 28



Jun 28



Jun 28



Jun 28



Jun 28


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