| Wednesday July 22nd, 2009 |
|
| |    |
Pi Day and Pi Approximation Day are two holidays held to celebrate the mathematical constant π (pi). Pi Day is observed on March 14 (3/14 in American date format), due to π being roughly equal to 3.14. Pi Approximation Day is observed on July 22, due to π being roughly equal to 22/7. Pi Day is also sometimes celebrated on March 14 at 1:59 p.m. If π is truncated to seven decimal places, it becomes 3.1415926, making March 14 at 1:59:26 p.m., Pi Second (or sometimes March 14, 1592 at 6:53:58 a.m.). March 14 also happens to be Albert Einstein's birthday.
(... from Wikipedia on 2009-01-01 08:40:10 )
|
|
|
| Thursday July 22nd, 2010 |
| |    |
| Friday July 22nd, 2011 |
| |    |
| Sunday July 22nd, 2012 |
| |    |
| Monday July 22nd, 2013 |
| |    |
| Tuesday July 22nd, 2014 |
| |    |
| Wednesday July 22nd, 2015 |
| |    |
| Friday July 22nd, 2016 |
| |    |
| Saturday July 22nd, 2017 |
| |    |
| Sunday July 22nd, 2018 |
| |    |
| | |