MathForge (a superb maths blog, worth subscribing to its newsfeed) claims that people all over the world are celebrating Pi Day since today is 3/14 which consists of the first 3 digits of the decimal expansion of . Not in the UK and other countries where the date is 14/3.
I propose an [i]e[/i] day to be celebrated on 2nd July all over the world
PS Added on 18 March
Anonymous on MathForge has just posted to say:
In fact on this side of the pond we celebrate pi day on the 22nd of July. Approximately.