Ever since Steven Spielberg's Jaws changed movies forever in 1975, the movie calender has been dominated by the American summer, when the biggest "event" movies are released.
While this traditionally has occured from May to August, over the years the Blockbuster Season has crept back further and further, expanding through April into March.
The perception is that by getting in slightly earlier, films can feed off Blockbuster Season fever while not being lumped in with so many other competitors.
The Matrix (released March 31, 1999) and 300 (released March 9, 2007) are two examples of films achieving great success in this "Pre-Season" window.
I got thinking about this yesterday when I received my invitation to the media screening of Disney's new mega-budget sci-fi action flick John Carter, which is the first event movie out of the gate this season.