only America uses the mm/dd/yyyy format and that confuses a lot of people the first time they encounter thing over here.
11/8 and 8/11 does make a bit of a difference.
I learned to use celsius, kilometres and grams but back the US of A they are of secondary importance.
America is like an island in some ways, also in sports - football is different here and baseball instead of cricket.
nobody here has heard of bandy or watches cricket or rugby league.