Actually illiterate means the lack of language not simple math and/or math concepts such as calender formatting.
First of all mm/dd/yy is used particularly in military, academic, scientific, computing, industrial, or governmental contexts.
So to say he is illiterate is acceptable if your referring to his English, otherwise your ignorant.
Though you should know he is foreign and doesn't speak it. So be tolerable.
Muči daj!
Swat-css:
PM Jimster and/or email him and he will set you up.