Got an idea for a new holiday? Let us know!
Submit Holiday

Pi Approximation Day

Celebrate Pi Approximation Day by exploring the fascinating world of mathematics and approximating pi with your own calculations!
Weekly And Monthly Reports - Techcloud X Webflow Template
When it is?
July 22
Location Icon
United States
Email Icon

Celebrate Pi Approximation Day on July 22 with a slice of your favorite pie! This special day was first celebrated in 1949 to commemorate the achievement of Archimedes, who approximated pi—the ratio between the circumference and diameter of a circle—as 3.14 in the 3rd century B.C. Although his calculation wasn't quite precise, it is still an incredible accomplishment that we continue to celebrate today!

History of Pi Approximation Day

Pi Approximation Day Dates

Pi Approximation Day Timeline

<div class='timeline-item'><div class='timeline-left'><div class='timeline-date-text'>287 B.C.</div></div><div class='timeline-center'></div><div class='timeline-right'><div class='timeline-text timeline-text-title'>Archimedes Approximates Pi</div><div class='timeline-text'>The Greek mathematician, Archimedes, approximated pi as 3.14, setting the stage for developing calculus and trigonometry.</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 the Pi Symbol</div><div class='timeline-text'>The Greek letter "π" is first used to represent the ratio of a circle's circumference to its diameter by Welsh mathematician William Jones.</div></div></div><div class='timeline-item'><div class='timeline-left'><div class='timeline-date-text'>1873</div></div><div class='timeline-center'></div><div class='timeline-right'><div class='timeline-text timeline-text-title'>Pi Formula Development</div><div class='timeline-text'>Indian mathematician Srinivasa Ramanujan develops formulas to calculate pi, significantly improving its calculation accuracy.</div></div></div><div class='timeline-item'><div class='timeline-left'><div class='timeline-date-text'>1949</div></div><div class='timeline-center'></div><div class='timeline-right'><div class='timeline-text timeline-text-title'>Pi Approximation Day Celebration</div><div class='timeline-text'>First modern celebration of Pi Approximation Day, celebrating the achievements of early mathematicians and their fractional approximation of pi.</div></div></div><div class='timeline-item'><div class='timeline-left'><div class='timeline-date-text'>2008</div></div><div class='timeline-center'></div><div class='timeline-right'><div class='timeline-text timeline-text-title'>Circle Drawing World Record</div><div class='timeline-text'>Guinness World Record set for most accurate hand-drawn circle, a celebratory act often associated with Pi Approximation Day.</div></div></div>

How to Celebrate Pi Approximation 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 Pi Approximation Day cake</h3><p id='' class='facts-text'>Making a cake with the number 3.14 written on it is a fun and creative way to celebrate Pi Approximation Day. You can use food coloring to make the number stand out and use the cake as an opportunity to teach family and friends about pi.</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'>Have a pi memorization contest</h3><p id='' class='facts-text'>Gather your friends and family for a friendly competition to see who can remember the most digits of pi. To make it more interesting, you can offer prizes or create different levels of difficulty based on how many digits each person needs to remember.</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'>Throw a pi party</h3><p id='' class='facts-text'>Invite your friends over for a Pi Approximation Day celebration! Decorate with balloons, streamers, and math puzzles. Serve up snacks that look like circles or have numbers in them such as doughnuts, M&Ms, and tarts. Have guests write down their favorite pie recipes for everyone to take home.</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'>Create a scavenger hunt</h3><p id='' class='facts-text'>Hide clues around your house or neighborhood that lead participants to an ultimate prize at the end. Each clue should have something related to pi - this could be equations, facts about pi, or even pictures of pies! The winner can receive a special gift like a book on mathematics or some yummy pies.</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'>Visit an observatory</h3><p id='' class='facts-text'>Take a trip to your nearest observatory and spend the day learning about space and its relation to mathematics! Many observatories offer tours and programs that will help you understand why pi is so important in astronomy.</p></div></div>

Why Pi Approximation 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 honors mathematical advances</h3><p id='' class='whywelove-text'>Pi Approximation Day is a time to celebrate and honor the achievement of great mathematicians, past and present. It not only recognizes the development of pi approximation formulas, but also the dedication and hard work that goes into advancing the field of mathematics.</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 encourages exploration of math</h3><p id='' class='whywelove-text'>Pi Approximation Day provides an opportunity for people of all ages to explore math in a fun and educational way. You can take part in activities like measuring the circumference of objects or creating your own formula to approximate pi. By participating, you can gain a better understanding of why pi is so important and its many real-world applications.</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 helps us understand the world</h3><p id='' class='whywelove-text'>By understanding pi approximation methods, we can gain further insight into how numbers play a role in the natural world. Pi's equations are used to measure things like gravity, probability and even structural integrity. So celebrating Pi Approximation Day helps remind us to be curious about our surroundings and invest more effort into exploring the mysteries of mathematics!</p></div></div>

Unraveling 5 Astonishing Facts about Pi Approximation 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'>Archimedes approximated Pi to 22/7</h3><p class='facts-content'>Even though he didn't nail the exact value, Archimedes was remarkably close with his estimation of Pi as 22/7. It's quite an accomplishment considering the time and tools available in the 3rd century B.C.</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'>22/7 Day is selected as it represents the fractional approximation of Pi</h3><p class='facts-content'>The day July 22, written as 22/7 in the day/month format, is a fractional approximation of Pi, hence it's chosen to celebrate Pi Approximation Day.</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'>Largest sequence of Pi calculated by computers</h3><p class='facts-content'>Computer scientist Peter Trueb computed 31.4 trillion digits of Pi as of 2019, the most extensive calculation of Pi to date, showcasing human advancement in technology and computation power.</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 Day is also recognized on March 14</h3><p class='facts-content'>In addition to Pi Approximation Day, Pi Day is celebrated on March 14, or 3/14 to represent the first three digits of Pi (3.14). Many mathematicians and enthusiasts will recognize both days.</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'>Algorithmic steps of Ancient Indian Mathematics for Pi</h3><p class='facts-content'>The Indian mathematician Madhava in the 14th century devised infinite series computations that could provide any level of accuracy for Pi. His method provided the basis for calculating Pi that is still used in computers today.</p></div></div>

Pi Approximation Day FAQs

When is Pi Approximation Day?

Pi Approximation Day is celebrated on July 22nd every year. In 2024, Pi Approximation Day will occur on a Monday.

Pi Approximation Day Dates



Jul 22



Jul 22



Jul 22



Jul 22



Jul 22


Special Interest Holidays