<p>You can say five until five in the afternoon (cinq heures moins cinq a l’après-midi), but not five until 1700(<s>dix-sept heures moins cinq</s> dix-sept heures et cinquante-cinq). Also, whose idea was it to make seventy ‘sixty-plus-ten’, eighty ‘twenty-times-four’, and ninety ‘twenty-times-four-plus-ten’?</p>