The following is a short writeup I did for an event on Facebook celebrating Dozenal Pi Day on March 18, 11B6 (decimal March 20, 2010). As indicated in the text, it includes some borrowed material from the Wikipedia article on duodecimalism.
I am not sure when exactly this "Pi Day" thing became so fashionable, but for me it has come to symbolize everything that is wrong and unwholesome about modern society's relationship with numbers. You see, of late I find myself more and more perturbed by the extent to which people seem to take the primacy of decimal notation for granted in conceptualizing and comparing numbers. In the case of pi, there is NOTHING particularly universal or ontologically significant in the sequence of digits 3.14159265... except that they represent a certain way of parsing the value of pi by successive fractions of ten. THIS IS MAY BE INTERESTING IF YOU ARE REALLY INTO THE NUMBER TEN FOR SOME REASON. Otherwise it—like the entire decimal radix system—is fairly useless.