According to Peter Molyneux, head of Lionhead Studios, he would like to have Fable III completed by 'Thanksgiving' of this year. Of course this is in reference to the American Thanksgiving, which falls on November 25th.
When talking with Times Online about a release date for Fable III, Molyneux stated, "We are going to finish it in time so that the powers that be can make that decision. Thanksgiving is the shut-off date."
If all goes according to plan, this should see Fable III hit stores just in time for the yearly games pileup that is Christmas season.
Source: Times Online