All Events, Closures and Refurbishments at Disney California Adventure or Resort Wide in Disneyland during September and December of 2016 and 2022

September 2016

Aug. 29 - Sep. 01Hollywood Land : Disney California AdventureTwilight Zone Tower of Tower Refurbishment
September 1 - 4Resort Wide : Disneyland ResortDisneyland Half Marathon Weekend September 1-4. Events include the Health and Fitness Expo, Kids Races, 5K, 10K, and Half Marathon. The 5K, 10K, and Kids Races are sold out, but registration is still open for the half marathon and the Dumbo Double Dare.
Sep. 06 - Sep. 28Pixar Pier : Disney California AdventureAriel's Undersea Adventure Closed for refurbishment
Sep. 06 - Oct. 02Disney California Adventure : Disneyland ResortAP Days at Disney California Adventure AP Days will take place at Disney California Adventure from September 6-October 2. Special events for Annual Passholders include Disney character appearances, a series of AP buttons and recipe cards (a new one each Monday while supplies last), color/crafting opportunities for kids, and special merchandise.
Sep. 09 - Oct. 31Resort Wide : Disneyland ResortHalloween Time Special decorations, food items, and character costumes in both theme parks. The Haunted Mansion gets its seasonal makeover to Haunted Mansion Holiday.
Sep. 26 - Sep. 27Pixar Pier : Disney California AdventureGoofy's Sky School Refurbishment

December 2016

http://land.allears.net/blogs/dnews/2016/09/new_merriment_coming_to_the_di.html - Jan. 08Resort Wide : Disneyland ResortHolidays at the Disneyland Resort Festive decorations resort-wide, including Christmas trees and gingerbread houses. Holiday parade and fireworks show in Disneyland, and the new World of Color - Winter Dreams and Festival of Holidays celebration in Disney California Adventure. Holiday themed versions of Jungle Cruise, Haunted Mansion, and "it's a small world". Special treats and menu items in both theme parks. Meet and Greet opportunities with holiday costumed characters and Santa Claus. Ice skating rink in Downtown Disney.
Nov. 10 - Jan. 08Disney California Adventure : Disneyland ResortFestival of Holidays Celebrate holidays around the world from November 10, 2017-January 7, 2018. Daily activities around Disney California Adventure include festival themed food and beverage booths, performances by guest musical groups, and the returning Viva Navidad! celebration.
Nov. 10 - Jan. 08Pixar Pier : Disney California AdventureWorld of Color - Season of Light This new World of Color show celebrates the season with holiday music and memorable moments from Disney animated movies.

September 2022

2022 - TBDDisney California Adventure : Disneyland ResortSilly Symphony Swings Silly Symphony Swings is currently closed for refurbishment in Disney California Adventure. A reopening date has not yet been announced.
May 2 - TBDDisney California Adventure : Disneyland ResortAnimation Academy Animation Academy will close in Disney California Adventure on May 2nd, 2022. A reopening date has not yet been announced.

December 2022

2022 - TBDDisney California Adventure : Disneyland ResortSilly Symphony Swings Silly Symphony Swings is currently closed for refurbishment in Disney California Adventure. A reopening date has not yet been announced.
May 2 - TBDDisney California Adventure : Disneyland ResortAnimation Academy Animation Academy will close in Disney California Adventure on May 2nd, 2022. A reopening date has not yet been announced.