Hi there, Elizabeth!
I'm so glad you stopped by the Moms Panel with your question because the last day of
Mickey's Very Merry Christmas Party is the 19th of December this year. This hard-ticketed event is not held after that date at all. Magic Kingdom Park will still be all dressed up in its holiday best with all of the absolutely gorgeous Christmas decorations all around the Park, so you will still be able to see all of that.
Now, in years passed, I have seen
Mickey's Once Upon A Christmastime Parade take place for all Guests in attendance at Magic Kingdom Park. That is not something that I would bet on though, because we never know if things that happened in previous years will happen again in the current year. You can check the online calendar for specific events that are planned during your vacation and be sure to pick up a
Times Guide on your way into the Park each day of your visit.
I sure hope this helps with your planning! Please don't hesitate to write back in if we can help with any additional questions you have as you continue to plan.
Wishing you and your family a Pixie Dusted vacation!
~Jackie