March 14: It's Albert Einstein's Birthday! (it's also Pi day)

Pi Day in the U.S. is March 14 (3.14), in Europe it is July 22 (22/7). It's a never-ending party!

We first used this on March 14, 2009:

Also known as Talk Like a Physicist Day.
A reader emails:

How do I talk like a Physicist, a primer

From: TalkLikeAPhysicist.com

Thanks doc!

We've been celebrating Pi Day for a while although not nearly as long as some.
Here's a post from 3.14 '08:

I was so wrapped up in the BSC** conference call that I almost forgot the important stuff.
Some have dated the first Pi day celebration to March 14, 1592 at 6:53:58. This is incorrect.
It is obvious the Druids knew Pi.

Bear Stearns. Brings back memories.
 
Some other celebrations--

Blueberry pie:

From A Guide to Mathematics on the Simpsons

From Forbes:

Here's Pi to the first 350,390 places (really!):

 

 (click to enlarge)

And finally, San Francisco's Exploratorium is having their 25th annual Pi Day celebration.