Hello Julie,
Welcome to the Disney Parks Moms Panel. I am thrilled you came to us with your question. I think it is a splendid idea to treat your daughter to a day of fun and excitement in the
Magic Kingdom. The park is full of special holiday magic and decorations through New Years Days, so it will be the perfect backdrop for your park adventure.
I have great news for you! When
purchasing tickets to Walt Disney World theme parks, you do not have to know the exact date you will be visiting, just a general idea. This determines what type of "season" it is. For example, there are peak, regular, and value seasons. However, if you know the week you will be going, that is a start. Once you purchase your tickets, you can use them any day within a specified time frame. I believe that is typically a year.
I hope this clarifies it for you. Feel free to stop back by with more questions if they come up. We would be happy to assist you in any way we can.
~Allison L