While the "historic hours" are helpful, be careful! Business took a real dive at WDW after 9/11. It is coming back with a roar. WDW continues to make adjustments in Park hours depending on crowds they anticipate. With 30,000 rooms on-property, WDW has a pretty good idea what "the books" look like & they will make adjustments accordingly. Use the "histories" for guidance, but be sure to pick up a brochure at check-in with Park & event hours!