Confusing the way people talk about times: in #Afrikaans, half-sewe (Half-seven) means half-past six, or "half an hour BEFORE seven".
When a #British person says "half-seven", they mean half PAST seven.
Lots of confusion there. It's almost as bad as midnight, which can either mean 23:59:59 or 00:00:00, and not even Wikipedia can tell you when it means what. And it makes a BIG difference, because when someone says something starts "tomorrow at midnight", do they mean Tuesday at 00:00:00, or Tuesday at 23:59:59? Arrgh, it's infurtiating.
Speaking of which, it really grates me when people talk about "last night at three AM". Because any time on or after 00:00:00 is clearly MORNING. It's "three o'clock this morning", NOT "last night at three o'clock." (yes, I would say, "this morning at midnight", too) :-P