03/14/2026
Saturday, 14 March - Happy 147th Birthday to Einstein and happy Pi[e] Day! :D
A holiday devoted to a math constant might not sound exciting. But Pi Day, celebrated every March 14 (3/14) in the United States, is an exception. The day usually starts with activities celebrating pi (π) — the ratio of a circle’s circumference to its diameter (about 3.14). But it almost always ends with a tasty slice of pie.
The fun tradition is credited to Larry Shaw, a physicist at San Francisco’s Exploratorium. On March 14, 1988, he convinced colleagues to walk around the museum's "Pi Shrine"— a circular plaque inscribed with the first 100 digits of pi — and enjoy fruit pies.
The Babylonians were the first to estimate pi about 4,000 years ago. They gave it a value of 3.125. A few hundred years later, the ancient Egyptians refined it to 3.1605.
Archimedes of Syracuse (287-212 BC) was the first to calculate pi mathematically. He gave it a range of between 3.1408 and 3.1429. Considering these early mathematicians did not even have calculators, their precision was truly impressive. Today, with advanced computing, pi has been calculated to trillions of digits. But for most, 3.14 — or even a slice of pie — is enough to celebrate!