In fact, though we made a big deal of last year’s celebration as the “Ultimate Pi Day”, or the “Pi Day of the Century”, a case can be made that today is even more special! Today’s date, 3/14/16, is a rounded-up version of pi to four decimal places (rather than a truncated version like last year); it also only comes around only once a century; and in fact 3.1416 is about nine times closer to the actual value of pi than 3.1415 is! 😉

If you’re a little bummed out that we won’t have a “pi day of the century” next year (after all, 3.1417 doesn’t seem too special), check out this article (via MAA) which proves that, for some norm other than the Euclidean distance, there is a “pi” for that norm that will match that year–thus every pi day can be the “pi day of the century”!

I wore a shirt with a similar message today! (Image via Cliff Pickover)

OK, here’s your round-up of cool pi links:

Mile of pi: a video where some math folks print out a million digits of pi, then lay that out on an airport runway, highlighting some interesting pi facts along the way

And, finally, a non-pi related article by Evelyn Lamb, on a result which just happened to be mathematical breaking news today, on unexpected patterns in the prime numbers!

FYI – I’m actually more partial to truncating than rounding, at least in part because then you can continue (e.g. pi moment last year at 3/14/15 9:26:53…). With a rounded pi day, 3/14/16, perhaps pi moment should have been celebrated at a negative time, the day before??

RT @BSamuels72: Perhaps stung by criticism of donation to renovate police station, @Ravens reveal $1.5 m contribution to West Baltimore sch… 3 hours ago

happy international pi approximation day, twitter! 3 hours ago

FYI – I’m actually more partial to truncating than rounding, at least in part because then you can continue (e.g. pi moment last year at 3/14/15 9:26:53…). With a rounded pi day, 3/14/16, perhaps pi moment should have been celebrated at a negative time, the day before??