Pi Day is celebrated every year on March 14, honouring the significance of the mathematical constant π and its applications ...
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Circle the date! Today is Pi Day for 2026!

This day only comes 'round' once every year!
Mathematician Carlos Castillo-Chavez says that pi is so important to math that using its simple, geometric definition denies its greater powers. "[Pi] brings you into the world of mathematics, which ...
You’re likely familiar with Pi Day, perhaps the most popular of geeky holidays. Hooray. But I’m here to tell you that Pi Day is wrong — or rather, the entire idea of pi as a mathematical concept is ...
Every year on March 14, people around the world celebrate Pi Day, a day dedicated to the mathematical constant π (pi) ...
As a physics reporter and lover of mathematics, I won’t be celebrating Pi Day this year. That’s because pi is wrong. I don’t mean that the value is incorrect. Pi, known by the symbol π, is the number ...
Happy Pi Day, the annual celebration of this incredible, mysterious, and irrational mathematical constant. Happy Pi Day, the annual celebration of this incredible, mysterious, and irrational ...
Every year on March 14, classrooms, universities and research institutions across the world turn their attention to a subject that quietly shapes modern civilisation, mathematics. The date is observed ...