[ivanhoe]

And the truth is that even when you live in a country where 24 hours notation is commonly used, like I do, you'll still more often say "5 in the afternoon", than 17 hours. The latter form is used in writing when you wish to sound more formal or when you really want to make sure there's no ambiguity. And not in the "army" style like 17 hundred, but you just say 17 or in written form 17h. All in all, it's just a matter of notation, once you're used to it sufficiently it translates to the clock face the same. Whether it's written as 13h or 1pm I visualise it exactly the same.