US EditionFrom Circles to Spacecraft: How Pi Powers Science — and Dessert
UNESCO expanded Pi Day into International Mathematics Day with a 2026 theme of hope, emphasizing math's role in solving real-world problems, UNESCO said.
- On March 14, 2026 the United Nations Educational, Scientific and Cultural Organization marked International Mathematics Day with the 2026 theme 'Mathematics and hope', expanding Pi Day into a global celebration.
- Larry Shaw, physicist and Pi Day founder, first observed it in 1988 at the San Francisco Exploratorium, and the U.S. House of Representatives recognised 3/14 in a 2009 resolution.
- Researchers use pi to compute areas and volumes of circular objects, apply it in biomedical tests like a 20-minute Lyme test, while engineers rely on pi for spacecraft motion and signal design.
- UNESCO says the observance aims to raise public awareness of mathematics' role in addressing real-world challenges and supporting scientific and technological development, helping societies navigate uncertainty and envision inclusive and sustainable futures.
- Enthusiasts commemorate 3/14 with contests, parades and pie, with celebrations at 1:59 p.m., overlapping Albert Einstein's birthday, Google released an interactive Doodle.
12 Articles
12 Articles
From circles to spacecraft: How pi powers science — and dessert
Math nerds and dessert enthusiasts unite to celebrate Pi Day every March 14, the date that represents the first three digits of the mathematical constant pi.Representing the ratio of a circle's circumference to its diameter, pi is approximately equal to 3.14159 but its digits go on forever. In school, you might have used it to calculate the area of a circle or the volume of a cylinder. But the applications of pi are endless and part of every cor…
International Mathematics and Pi Day, celebrated annually on March 14, is dedicated to the mathematical constant pi and highlights the important role of mathematics in breakthroughs in science and improving the quality of life. This year's theme for International Mathematics Day is Mathematics and Hope.
As every year on March 14, the World Day of Pi (π Day) will celebrate the most famous constant of geometry. How far has humanity pushed the obsession of decimals? Where is it in Pi's calculation?
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