Because pi is 3.14 and March 14 can be written 3/14 or 3.14.
Several well known mathematicians were born on March 14 but perhaps the most famous is Albert Einstein whose was born 14 March 1879.
March 14th is 3/14. pi=~3.14
Albert Einstein
On the basis that you are familiar with terms such as "tetrakaidecagon" I assume you are mathematically at a stage where angles are measured in radians and not degrees. Then the interior angles of a 14 sided polygon sum to (14-2)*pi radians or 12*pi radians.
Special Report with Brit Hume - 1996 2013-03-14 was released on: USA: 14 March 2013
Special Report with Brit Hume - 1996 2012-03-14 was released on: USA: 14 March 2012
Special Report with Brit Hume - 1996 2014-03-14 was released on: USA: 14 March 2014
Lords of War - 2012 Special Ops 1-14 was released on: USA: 6 March 2013
Jersey Shore - 2009 Reunion Special 3-14 was released on: USA: 31 March 2011
The In-Betweens of Holly Malone - 2005 Special Delivery 2-14 was released on: USA: March 2009
Extra Special Delivery - 1963 TV was released on: USA: 14 March 1963
Cops - 1989 Taken Into Custody 3 Special Edition 25-14 was released on: USA: March 2013
E Entertainment Special Britney Spears - 2004 TV was released on: USA: 14 March 2004
The Doris Mary Anne Kappelhoff Special - 1971 TV was released on: USA: 14 March 1971
The only one I know is Valentines Day February 14th -- March 14- white day April 14 -black day (singles day)
Any number that is greater than 14 or less than -14 will have an absolute value greater than 14. Mathematically expressed as if |n| > 14 then n > 14 or n < -14.