This is actually an interesting topic, and I'd like to explain why the american system, as usual, is superior (I jest, but it really is a good system if you think about it!). First, it makes sense that the most important information be read first--humans have a tendency to remember the first thing they were told better than things in the middle. That's exactly what happens in the American system. Why is the month the most important? Well, the month will tell you the most information about what it is like outside. You would never think to yourself "gee it's the 3rd, I better get out my winter clothes." Of course, as time has progressed, what it's like outside has gotten less important, because of technology. The year is completely arbitrary, and the day is only there so you can coordinate easily with other people. So... I hope that clears everything up. Go America.