an icepick through the keyhole

3.14 / Pi = 0.9994930426171027086285900339793 ...
  Error = -0.0506957 %

(22/7) / Pi = 1.000402499434770681975840798341 ...
  Error = +0.0402499 %

I can't help feeling immensely proud that our Pi Approximation Day is so much more accurate than the American one. =:o>

But of course, the best estimate is to split the difference:

(3.14 + (22/7) ) / (2 * Pi) = 0.9999477710259366953022154161604 ...
  Error = -0.0052229 %

(Hear the chanting in the streets: "Unity Is Strength! Or At Least, Greatly Improved Accuracy!")

And this means, of course, that the *best* Pi approximation day to celibrate is:

( March 14th + 22nd July ) / 2 = 18th May

=:o}