Hello Dalee! Visiting the Most Magical Place on Earth during the most wonderful time of the year is a great way to celebrate the holidays!
The Disney Parks are as excited for the holidays as a child on Christmas Eve! In fact, as soon as the last Halloween candy is given out on Halloween night, the Christmas decorations are ready to go up! The transition between Halloween and Christmas occurs very quickly! In fact, it takes place so quickly that one must believe it takes a combination of Disney pixie dust and Christmas magic!
We know that the decorations will be up in time for the
Disney Very Merriest After Hours event which begins on November 8th at
Magic Kingdom Park. That is a rather good indicator of when decorations will be up throughout the Disney Parks! Typically, all of the parks, as well as the resort hotels, are decorated by mid-November!
Dalee, I hope this helps with your planning! Merry Christmas!
Hakuna Matata! Jonathan