We (and the majority of countries) use the 'little endian form' which is a contraction of the way we used to write. Today's date would have been written as 'the second day of October in the year of our Lord 2008'.
The USA and Canada use the 'middle endian form' as that follows their speech pattern - October 2nd.
I blame lazy speech. 'October 2nd' is only two words, whereas ' the 2nd of October' is four,
Actually the yymmdd form used in Asia makes much more sense. It matches the number system with the most significant digits to the left. It sorts correctly when ordered alphanumerically.