In my correspondence I now say May 6th instead of 5/6 or 6/5. From what I have observed, here in the US it is usually a pretentious person who writes 6 May instead of May 6th. I think it is considerate to make one's speaking clear, especially when addressing an international community...but please deliver me from all the snob wannabes who are so arrogant as to purposely try to use a manner of speaking or writing just to call attention to what they know. This really is a small issue which is easily solved by just writing out the month. It really doesn't matter if it's first or second.