I remember in the past the winter specials hit if you book for Jan-Feb.Does anyone know when this starts?

Check out this site on Mousesavers.com

http://www.mousesavers.com/historicalwdwdiscounts.html

It looks like the dates the codes became available vary from Oct. to Dec., but they have been consistent so I wouldn't hesitate booking that time of year because a code is most likely going to become available.