The release date of the Xbox One is November 27 2013, if Amazon is to be believed.
The Amazon page for the Xbox One has been updated to state that “This item will be released on November 27, 2013.” Several other pages for launch title games such as Forza Motorsport 5, Dead Rising 3 and Kinect Sports: Rivals have also been updated to reflect the new date.
Microsoft is yet to provide an official release date for the Xbox One, but has said the console will be launched during November. The November 27 date does put it on the right side of Thanksgiving and Black Friday (the 28th), which was always going to be a goal for Microsoft (and will be for Sony and its release of the PS4 too).
The only bad thing I guess is that the 27th means a reasonably long wait through November to get our hands on the X1!