Celebrating Pi Day Mar. 14, 2026

Long before pi had a name, people were drawn to its mystery. Every year on March 14, Pi Day highlights one of math"s most recognisable constants. The date reflects the first three digits of pi (π), the ratio of a circle"s circumference to its diameter: 3.14. Pi"s infinite, nonrepeating decimal has fascinated thinkers for a long time. The modern celebration began in 1988, when physicist Larry Shaw marked the day with a fitting tribute: serving pie.

© Helen Hotson/Alamy

palette

Today in History

A beautiful labyrinth
Mar. 14, 2024Happy Pi Day!
Mar. 14, 2025Celebrating Pi Day

More Desktop Wallpapers:

Dec. 13, 2025Merced River, Yosemite National Park, California, United States
Nov. 20, 2025World Childrens Day
A cuddling pair of Taiwan yuhina
Jul. 12, 2024Mount Rainier National Park
Sports where you least expect it
On a dark and stormy night...
Dec. 3, 2025Sandhill cranes, Bosque del Apache National Wildlife Refuge, United States
Dec. 16, 2024Salzburg, Austria
Bridging the gap two ways
Why is this cliffside ablaze?
Oct. 7, 2025Fall colours below Mount Sneffels near Ridgway, Colorado, United States
Beautiful from all angles
Apr. 18, 2025International Day for Monuments and Sites
Nov. 10, 2023Badlands National Park anniversary
Positively purple peaks
Where fire and water meet
Oct. 8, 2023World Octopus Day
Nov. 25, 2025Trevi Fountain, Rome, Italy
Jan. 24, 2026Andermatt village in the Alps, Switzerland
Jan. 20, 2026Penguin Awareness Day
Jan. 30, 2026Winterlude begins
Sep. 26, 2024Blue-throated toucanet, Los Quetzales National Park, Costa Rica
Unbe-leaf-able
Jun. 15, 2025Happy Fathers Day!
Isn’t this view mesmerizing?
Oct. 29, 2024Great horned owl
Feb. 11, 2025Yungang Grottoes, Datong, China
Dec. 15, 2024Lake Misurina, Dolomites, Italy
Something to ‘bee’ thankful for
Out of this world