All Events, Closures and Refurbishments at Magic Kingdom or Sunset Boulevard in Walt Disney World during December of 2016 and 2021

December 2016

Feb. 07 - OPEN SEASONALLYSunset Boulevard : Disney's Hollywood StudiosClub Disney According to the official Disney website, Club Disney in the Sunset Showcase will be closed beginning February 7. No word on when or whether it will return. The Sunset Showcase will continue to host special events, such as Club Villain, however.
Now - Jun. 30Magic KingdomWalt Disney World Monorail System The Walt Disney World Resort Monorail System is undergoing refurbishment and may be on modified service and/or routes. If you plan to use this form of transportation during your visit, check to be sure of the best option available, as alternative transportation options will be available.
November 7 - Dec. 22Magic KingdomMickey's Very Merry Christmas Party From 7 p.m. to 12 a.m. during select nights, this annual ticketed event will bring Christmas joy to guests of all ages with festive decorations, towering Christmas trees, and wintry wonderful entertainment. The 2016 dates are: November 7, 8, 10, 11, 13, 15, 18, 27 and 29; December 1, 2, 4, 6, 8, 9, 11, 13, 15, 16, 18 and 22.
Nov. 28 - Dec. 01Liberty Square : Magic KingdomHaunted Mansion
Dec. 07 - Dec. 08Frontierland : Magic KingdomSplash Mountain

December 2021

Under Construction - TBDTomorrowland : Magic KingdomTRON: Lightcycle Run TRON Lightcycle Run is coaster-style attraction, in which riders board a train of two-wheeled Lightcycles. It offers access into the energy, lights and excitement of TRON's high-tech universe and is one of the most thrilling adventures.
Dec 2018 - December 23, 2022Main Street USA : Magic KingdomWalt Disney World Railroad The Walt Disney World Railroad will cease running and will sit "in residence" at its Main Street Station while work progresses on the new Tron coaster coming to Tomorrowland. This will give guests the chance to have an up-close look at the railroad and take advantage of some unique photo opportunities.
Oct 1, 2021 - Apr 1, 2023Magic Kingdom : Walt Disney WorldWalt Disney World 50th Anniversary Across all 4 parks
Nov. 08 - Dec. 21Magic Kingdom : Walt Disney WorldDisney Very Merriest After Hours On select nights only