I've gone to WDW the very first week in January for the last 3 years (not this year-couldn't wait!) and it kind of depends. Once, when I checked OUT to go home on January 8, the Christmas trees at POR and POFQ were still up. But if there's something you really want to see, go fast! One year, I went to Epcot 1/2-saw the tall Christmas tree. Two days later, all gone! Also, if something is supposed to end the day before you get there, and if it's convenient for you, run over and check it out the day you check in. One year, Osborne Lights were scheduled to end the day before I got there-I'd never seen them. Well, assuming I'd missed them, I went to DTD at check-in that evening. There I met a couple who'd just come from seeing the lights. They were so pleasantly surprised to be able to see them when they were scheduled to be down already. Meanwhile I did a silent G-rrrrrr for not checking for myself.