9/11 Attacks

Why do Americans use the illogical month-day-year date system, instead of the logically progressive British system of day-month-year? It always confuses me that the 9/11 attacks refer to 11 September 2001. Yesterday was the 12th anniversary of that atrocious assault by Islam on the USA. As part of the commemorations, this statue of an American cow appeared at the entrance to the New York City Fire Museum. It bears "Thank You" around its neck and images honouring the heroism of New York City firefighters, 343 of whom lost their lives in the atrocity. The anonymous artist knows how to get his message across.