Dear guys, thank you for your replies but I still don`t know for sure. A lot depends on it because I am correcting mock final exam papers and so far I have been rejecting all 24 time systems because I decided to be strict this year, especially that our head teacher asked us to.
The instructions to one exercise say that a student is supposed to write an invitation to a friend and one of the requirements is stating the date and time of the party. Quite a number of students used the Polish system, so they lost one point, sometimes two, out of 5 for that exercise.
100%, as long as the foreigner has used some form of public transport in their lives.
o, Americans cannot read it but they know to google it.
Yes, that's the way it is said. Not by the guy in the street though.
It's much more of a miltary thing.
The 24-hour clock is usually given in conjunction with transport times, eg British Rail, bus or coach times
Does it mean that if we take an average American, not too brilliant one, who has no access to the Internet, doesn`t belong to the military or hasn`t used the British Rail before, he/she might have a problem with deciphering the correct time if it is written 17.00 or 18.00 ?