That has been true in the past but as we all know rules seem to change at Disney more frequently than most people change their underwear. I will not be able to confirm this until it becomes official on Monday and I will give you guys an answer then.I asked a similar question a while back and the answer I was given, by a KK representative, was that the trip just needs to start by then. In this case, if you were staying a week and your first night was August 14, the whole trip would still fall under the "stay 4, get 3" deal.