Courtesy of Claire Frisbie

It's a number you never forget from school: 3.14, aka π aka the ratio of a circle's circumference to its diameter.

It's also the perfect excuse to bake and scarf down pies today, on Pi Day. Today has been dubbed Pi Day of the Century since at 9:26:53 AM it marked exactly 3.1415 9:2653.

Nerds rejoice with some cherry pie!

Never loved math more than now.

God bless America, and apple pi.

https://instagram.com/p/0NZ1eewh7n/

Crumble straight to my heart.

Ultimate nerdery.

In my belly!

Of course the pros jumped on the Pi bandwagon

https://instagram.com/p/0NZ4okmKE_/

A little burnt around the edges, gooey on the inside. Such a metaphor for life.

This is not a pie, it's straight-up chocolate cake. Pi Day don't care. Neither do I.

https://instagram.com/p/0NZ3_IE_bU/

This, on the other hand….nice try.