I went about 5 years in a row that very first week in January (a couple times I checked in on New Year's Day) and you know what I always found out? There's no consistency from year to year on how long the lights stay up. As a CM told me, it depends on when they get "round 'tuit". One year, things came down in Epcot January 2; another year, same decorations, January 7; then January 4th. And what amazed me was that everything was completed overnight, never any signs of "in progress" work. One night we left Epcot after Illuminations, went thru the BWV lobby to all the decorations up. Next morning, everything at BWV was taken down and everything was back to normal. In Epcot, where there'd previously been a tree, not only was the tree gone, but everything was replanted-no "empty" spots.