I really am not sure of the specifics, but seems like it was started on a small basis in the late 80s, and grew steadily over the years. At first it encompassed just the town square area but expanded to now include the whole park. My first Christmas visit would have been about '97, and the park was well done, but many attractions and shops were closed, especially toward the back of the park. Since then, I've been back for Christmas three or four times. Last year was spectacular. The lights over the years have increased, the Christmas shows are always very nice. Now, about the only thing closed are a few of the smaller shops and water rides. So it is worth it to go. This year they will begin a theatrical production of It's a wonderful life, which is bound to be top notch.