Celebrating Pi Day 14 Mar 2025

Celebrating Pi Day

Calculating the ratio of a circle"s circumference to its diameter is as easy as pi. Today is Pi Day, an event that celebrates this mathematical constant. This date was chosen because 3, 1 and 4 are the first three significant figures of pi (π) when it is written out. Pi is an irrational number, which means that it can"t be written as a fraction. When written out, its decimal representation goes on infinitely without repeating. The oldest attempts to calculate pi date back to ancient Babylon and Egypt, around 1,900 BCE.

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Today in History

A beautiful labyrinth
14 Mar 2024Happy Pi Day!

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6 Jan 2025Flooded crypt, Basilica of San Francesco, Ravenna, Italy
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29 Sep 2024West Cornwall Covered Bridge, Connecticut, USA
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Sentinel of the sea
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12 Mar 2025Château de Sully-sur-Loire, Centre-Val de Loire, France
Twinkle twinkle, little bugs
9 Jul 2024Talampaya National Park, Argentina