the one and only day that you might actually look forward to going to a math class, as many teachers allow their students to bring in a pie on this special occasion. unless of coarse your math teacher is a fucking nazi, in that case they might just spend the whole period ranting about how cool some retarded number that goes on forever is. yes thats right 3.14 is not technically pi, it goes on and on and on much like ancient old men who think shit like that is cool.
kid 1: "hey man wanna skip next period and smoke a j?"
kid 2: "Yeah... wait today is pi day! we cant skip math class today! we need to smoke now so we can take care of our munchies in there dude."
kid 1: "totally"
by Hannah Mmmmm March 14, 2007
Get the pi day mug.
March 14, the day when MIT hopefuls get slaughtered by the slew of rejections
College Forum:

m32smith: its pi day everyone, MIT decisions are out : )

chingchong41: REJECTED
2400 SAT
5.00 GPA
Tennis Captain
Intel Finalist

Oh noes!! I shame my family, my parents beat me!

wingwang99: This isnt good....
by manhandle March 15, 2010
Get the pi day mug.
a day thats been called pi day cause of the 3rd month on the 14th day. most men don't care cause its steak and BJ day
Piggy: 3.14! todays Pi day!
Jack: shut up fatty! I should be gettin a blowin from my lovely wife today! stick that in your "Pi" and smoke it!
by alex234 March 14, 2007
Get the pi day mug.
Pi Day is when the countdown to 4-20 starts. It is exactly 37 days away from this point. And for those who do not know what 4-20 is, look it up :
it's pi day! 37 days left til 420
by itschelsaybby April 2, 2007
Get the pi day mug.
3.14 is pi so it's celebrated on march 14 (3/14) It's like 4/20 but for math geeks.
John: Yay its Pi Day!
Terry: Dude, you're a tool to math.
by *Molly* March 16, 2007
Get the pi day mug.
In Europe, this day is celebrated on 22nd July. Pi used to be calculated in Ancient Greece as a fraction loosely calculated as 22/7.
Hey Joe, are you going to be having Pizza Pie or Apple Pie to celebrate this year's Pi Day?
by Jonathan FeBland March 14, 2007
Get the Pi Day mug.
March 14th. It's American Pi Day because of the way dates are written in in the American style, with the month preceding the day. In countries that write the day preceding the month, Pi Day is more properly celebrated on 22nd of July.
Albert Einstein was born on March 14th. He had to move to America in the 1930s in order to take advantage of it being American Pi Day there.
by DrEnglish March 14, 2010
Get the American Pi Day mug.