Happy Pi Day!

Pi Day is an annual celebration of the mathematical constant π (pi). Pi Day is observed on March 14, (3/14 in the month/day date format since 3, 1, and 4 are the first three significant digits of π. In 2009, the United States House of Representatives supported the designation of Pi Day.

And of course pie is the only way to celebrate Pi Day.
Isn't it great that you can now purchase half a pie?
That way you don't have to decide- you can get half of two kinds. :)