Mickey's Once Upon A Christmastime Parade is the special parade for Mickey's Very Merry Christmas Party, a special event ticket at Disney's Magic Kingdom. Mickey's Very Merry Christmas Party occurs on special nights throughout November and December.
You can also see this special Disney Christmas parade during normal park hours on certain days. Parade times are 3pm on December 19th to 24th, and then two performances per day (12pm and 3:30pm) for the 25th to 31st.
As a special Insider's Guide To Disney tip, although the Mickey's Very Merry Christmas Party doesn't start until 7PM, you can get into the Magic Kingdom around 4:30PM (sometimes as early as 4PM!), giving you an extra 2-1/2 - 3 hours of park time!
We love the Christmas Party and go, every year. With limited park attendance and the most popular rides open, this makes for a fantastic event during Disney World's busiest season.