Why "Twilight" Bumped To November 21 Release?

Twilight fans who’ve heard the news that the movie debut is bumped to November 21 2008 are no doubt happy and even a bit surprised.
Originally slated for December release, the excitement of the film has been a bit like a moving train, fueled with book release parties, Comic-Con madness, and even some controversy about a magazine cover.
According to Warner Brothers, the reason behind the move is simply to get the film to the fans as quickly as possible.