Telltale never give the release date until, at most, a week before the release itself. With this method of game designing, making and distribution, it's never safe to give the fans a set release date because many things can change during the process of making the game - certain things may get in the way or go wrong, some things may delay the process slightly, or the game may be larger and longer than originally thought and they might need an extra couple of days to work on it. So I'm afraid you'll have to wait a little longer for a release date.
Edit: Sorry, my first sentence was wrong. The announcement of the release date can range from
just a few days to
2-and-bit-weeks.
Warning, both links contain MASSIVE spoilers for any of those who haven't yet played Tales of Monkey Island.