Pi Day

  • worldwide

Pi Day
Saturday, March 14

Celebrate the wonders of mathematics by calculating the diameter, or even the surface area, of a delicious pie.  Any flavour will do, as long as it's circular.  

If you prefer to write dates in the day/month/year format, and prefer expressing irrational numbers as fractions, you may celebrate on July 22.

But March 14 is Einstein's birthday, so do something visionary, whether it's pi-related or not.

And if you enjoy being a mathematical heretic, you can celebrate Tau Day on June 28 instead.