That kind of stuff is always very interesting to me. One wonders what happened that caused such a random change. Did we Americans do it just to be rebellious?
That's usually the case. The UK and other English-speaking contries adapted to the new international standards, while the US refused to do so (case in point, the metric system).^you never now it might be the other way around. And the rest of the English speaking world changed to the DD-MM style.