When is the Halo 4 being released?

I am curious as to when Halo 4 will be coming out.  I watched the trailer for the video game on a website, but the trailer didn’t tell us the Halo 4 release date.  I was wondering if anyone knows when the game might be coming out or when they might be telling the public when the game will be released.  I have seen some websites dedicated to release date for Halo 4 but they don’t tell you much information which is very disappointing.