User blog comment:TheRealPella/Consistent format for Shop tables/@comment-14583096-20131028193425/@comment-15636815-20131028210930

The format 02-29-2013 is invalid? Seriously? That's the most common method of writing dates in USA. True, most of the world prefers 29-02-2013, but Americans comprise the lion's share of the player base--and, arguably, potential new editors/contributors for the Wikia.

Is there some way to modify the template so it catches this format?

As for preferred format, I have used 29-Feb-2013 for decades (with or without the hyphens). It always avoids ambiguity (e.g.:  05-03-2013 - Is that May 3 or March 5?), and it's still very short.