"Tatters, that particular rule is there so that I keep track of what is happening on the Forum. By their nature daily\weekly crosswords don't need closing dates but those for Quizzes could be several weeks away."
I still don't get it. The closing date may be soon, far distant, already gone or even non-existent but the question and answer are the same in all four cases.
Incidentally, Quizzer49 posted an American cities quiz ten days ago without a closing date and that doesn't appear to have caused too much chaos.