Here in the US, we write dates in the month/day/year format, so today, 3/14 is special because it matches the first three digits of pi.

Around the world, lots of us celebrated last fall when it was 11/11/11, because that date was the same in many different formats.

How are dates written where you live? What special math-y days are you looking forward to? Will you be celebrating Pi Day today?

I have actually been spending the last few days working on a problem from the book “Exploring Mathematics With Your Computer” by Arthur Engel asking to calculate pi using the Leibniz formula, starting with the first 500 terms and continuing through the next 4500 terms for a total of 5000 terms.

Wow! I don’t know the Leibniz formula but now I want to check it out! I also looked up to see whether you’ve calculated more digits than have been memorized and was shocked to see just how much of pi some humans know. I wonder what’s so fascinating about the number? And why we’ve gotten so much more interested recently: http://en.wikipedia.org/wiki/File:PiDigits.svg