They do change their release date. If you click on "Flights" on their home screen. It is in the upper semi-banner with "Flight / Hotel / Car / Vacation", it will give you a new pop up screen. Click flights there and then on the new screen don't even bother putting in dates, simply click "!" where it shows the date they are currently accpeting reservations to. A box with pop up with the current date. Of you can bookmark that page, so you only have to click the little circle.