timrwood/moment — pull request #880 by jojosati (2013-07-07 22:00:44+00:00)
Title: add permissive year format "**YY"

add permissive year format "**YY"
create : accept both 2 and 4 digit year
format : display 4 digit same as "YYYY"

http://james.padolsey.com/javascript/permissive-user-input-validation/

example:
http://jsfiddle.net/kBQ8k/17/