"Because it occurs in the year 2015, this year�s �Pi Day� date can be written as 3/14/15�the first five digits of π. In fact, it is the �Pi Day of the Century� since another such date will not occur until 2115! Even more wonderfully, at 3/14 at 53 seconds past 9:26 a.m.�that is, 3/14/15 9:26:53�will be the Pi Second, matching the first ten digits of π! Surely math nerds everywhere (including the excited author of this very commentary) will rejoice!"