Pi Day, celebrated on March 14, honours mathematical constant Pi, recognising its significance in mathematics, particularly in circle calculations, and promoting interest in learning and practising ...

Pi Day is observed every year on March 14, marking the significance of the mathematical constant π (pi). The day is commemorated by mathematics enthusiasts around the world in recognition of the ...

This day only comes 'round' once every year! Today is Pi Day for 2026, the universal celebration of an amazing, mysterious, and irrational mathematical constant. What's that, you say? Why do we ...