NO SPOILERS OR USE THE CODE IF YOU MUST.
Originally it was to be aired in the Autumn of 2014 but they've brought it forwards:
I can't remember the book being that long!
http://screenrant.com/game-thrones-comic-con-2013-clip-season-4-premiere-date/
Originally it was to be aired in the Autumn of 2014 but they've brought it forwards:
Season 4 will air on HBO by Spring 2014 – as confirmed at the Game of Thrones 2013 Comic-Con panel – and will cover the remaining material in Martin’s novel “A Storm of Storms,” after Season 3 primarily drew from the first-half of that massive book (1,216 pages long in paperback form). There are some massive plot threads left dangling in season three – such as Mance Rayder’s (Ciarán Hinds) plan to “light the biggest fire the North has ever seen” – that will lead to big and action-heavy events in the next season. That should be pleasing news for a number of fans, who felt that S3 unfolded at too lethargic a pace as a whole.
I can't remember the book being that long!
http://screenrant.com/game-thrones-comic-con-2013-clip-season-4-premiere-date/