TITLE: Alternatives to pi day
QUESTION [15 upvotes]: If you don't already know, pi day happens on March 14 (3-14) every year. Festivities include reciting digits of pi and eating pies. I understand that it's all in good fun, but I've always felt that pi day is bad PR for mathematics. To non-mathematicians, it gives the impression that mathematics is about voodoo numerology, memorizing (or computing) digits of pi, and bad puns. The bad puns part is pretty accurate, but I don't care for the others.
So I propose we come up with some alternatives to pi day that send a better message about what mathematicians do. If you've got an idea, post it here. If possible, include the following information about your proposed holiday:

when is it celebrated?
what are the festivities?
what kind of food would be associated with this day?

Please post only one proposed holiday per post. If you have more than one, please post multiple answers.

REPLY [4 votes]: Pi Approximation Day on July 22nd. (ie, 22/7)
I celebrate it every year, by going out in the summer and getting cake, instead of pie like we do in March. It's approximately pie :)