These were the dates for the ten most recent Epcot International Food and Wine Festivals:
Friday, September 29, 2006 to Sunday, November 12, 2006 (44 days)
Friday, September 28, 2007 to Sunday, November 11, 2007 (44 days)
Friday, September 26, 2008 to Sunday, November 9, 2008 (44 days)
Friday, September 25, 2009 to Sunday, November 8, 2009 (44 days)
Friday, October 1, 10 to Sunday, November 14, 10 (44 days)
Friday, September 30, 2011 to Sunday, November 13, 2011 (44 days)
Friday, September 28, 2012 to Monday, November 12, 2012 (45 days)
Friday, September 27, 2013 to Monday, November 11, 2013 (45 days)
Friday, September 19, 2014 to Monday, November 10, 2014 (52 days)
Friday, September 25, 2015 to Monday, November 16, 2015 (52 days)
Except in 2014, the Festival always began on October 1 or the Friday before October 1.
The Festival has been getting longer. It's was 52 days in 2014 and 2015.
Disney needs some time between the end of the Festival and Thanksgiving. Taking down the Festival and setting up for the Holiday season are both major undertakings.
Here's my PREDICTION for 2016:
Friday, September 23, 2016 to Monday, November 14, 2016 (52 days)
Looking at the history, this prediction is based on another 52-day run and the same number days between the end of the Festival and Thanksgiving as in 2015.
Again, this is only a prediction. Please don't blame me if you book a vacation and Disney subsequently announces different dates.