Yes it is possible. I've seen BMWs manufactured as early as May that are of the following year's model year (say a 05/2012 manufacture date CAN be designated as a 2013 model if it was made to the spec of the 2013s).

On the same token, I've seen BMWs (albeit, older gens like late 90s and back) that don't show the next model year until later in the prior year (like Sep of the prior year). It really is a technicality as to the spec to which it was built to.