I’m not sure if this belongs under Only in Africa, or Never in Virginia. I know that it’s definitely the latter, but it’s possible that there are also other parts of the world where the population refuses to abide by normal timing conventions.
In addition to the confusion over the meaning of “now”, SAfricans also routinely issue invitations with a start time of, for instance, “7 for 7:30”. That means you can be there as early as 7, but you really should be there by 7:30 (though true locals will stretch it out for another 45 minutes to an hour or two, rarely more than three, just to be on the safe side).