The problem with formats like "12 Nov 2012" is when something arrives from overseas with "Expire 12 Zwy 2012" on it.
I was going to counter that there cannot be many countries that use the Julian-Gregorian calendar and Roman script, but call the months by entirely unrecognizable names. But omniglot promptly handed me a fistful, including Finnish and apparently the whole Baltic family. (Most others are really the same name, allowing for orthographic and phonetic changes.) Whether these names are used in international commerce is another matter.
Now, countries that use the Julian-Gregorian calendar and Roman script combined with unrecognizable month names, but still use the English word "Expire" ... ;)