The Christmas tree was up and lit at night yesterday, November 1st.
If you think this is an early start, I agree! But apparently the guests couldn't get enough of their holiday decorations at Epcot last year. Considering the Halloween decorations are coming down at Magic Kingdom and Christmas goes up. Decorations also start appaearing at Animal Kingdom while the Disney-MGM Studios hosts the Osbourne Spectacle of Lights starting November 13th.