All Events at Disneyland during March, July, September and December of 2016 and 2021

March 2016

Nov. 16 - TBATomorrowland : Disneyland ParkSeason of the Force Star Wars overlay, featuring Star Wars Launch Bay, Hyperspace Mountain, Path of the Jedi, and Star Wars-inspired foods at The Galactic Grill.
Early 2016 - May 6Adventureland : Disneyland ParkJungle Cruise Reopens May 6 after an extensive refurbishment.
March 2 - 27Fantasyland : Disneyland ParkEgg-stravaganza expanded this year with a new map available for an Easter Egg hunt in Downtown Disney, as well as the traditional hunts in Disneyland and Disney California Adventure. Maps are available at selected locations for $5.95 through March 27 or while supplies last.
Mar. 02 - Mar. 31Resort Wide : Disneyland ResortEggs-travaganza This year's event is expanded with a new map available for an Easter Egg hunt in Downtown Disney, as well as the traditional hunts in Disneyland and Disney California Adventure. Maps are available at selected locations for $5.95 through March 31 or while supplies last.
Mar. 18 - Apr. 15a bug's land : Disney California AdventureJungle Book Sneak Peek The Bugs Land theater is showing a sneak peek of The Jungle Book, which opens on April 15.

July 2016

Nov. 16 - TBATomorrowland : Disneyland ParkSeason of the Force Star Wars overlay, featuring Star Wars Launch Bay, Hyperspace Mountain, Path of the Jedi, and Star Wars-inspired foods at The Galactic Grill.
Jun. 16 - Aug. 13Disneyland Park : Disneyland ResortDisneyland All-American College Band This talented group of college students performs Tuesdays-Sundays for about 10 weeks during the summer. Performances are in various areas in both parks, and include a jazz set as well as marching band performances.
Jul. 01 - Aug. 14Hollywood Land : Disney California AdventureSneak peek of Pete's Dragon at Sunset Showcase Theater This sneak peek of the movie features in-theater special effects.
Jul. 04Disneyland Park : Disneyland ResortFourth of July Performances by the Third Marine Aircraft Wing Band The Third Marine Aircraft Wing Band will participate in a special 4th of July Flag Retreat Ceremony on Main Street, as well as perform an evening concert in the Fantasyland Theater.
Jul. 17Disneyland Park : Disneyland ResortDisneyland's 61st Birthday July 17, 2016

September 2016

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 - 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. 23 - Oct. 31Disneyland Park : Disneyland ResortMickey's Halloween Party Takes place at Disneyland Park on 17 selected nights on September and October, starting on September 23 with the final party on October 31. This not-so-scary Halloween party is a fun-filled evening for the whole family. In addition to trick-or-treating around the park, costumed character greetings, and Mickey's Halloween Party Character Cavalcade, the event also provides exclusive viewing of the Halloween Screams fireworks show. New this year: the Headless Horseman rides on Main Street prior to the Character Cavalcade.

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.
Nov. 11 - Jan. 01Disneyland Park : Disneyland ResortPaint the Night Parade The Paint the Night Parade will return to Disneyland on select nights during the holiday season. Performance dates are currently on the Disneyland calendar are November 18-27, December 2-4, December 9-11. It's expected that the parade will run daily from December 16-January 1.
Dec. 03 - Dec. 04Main Street, U.S.A. : Disneyland ParkCandlelight Processional The Christmas story told in music and readings from the Bible. Featuring a mass choir, full orchestra, and guest narrator, performed from the Main Street Train Station. Performance times and narrators are TBD.

March 2021

Mar. 18 - April 5Disney California Adventure : Disneyland ResortA Touch of Disney Disneyland's "A Touch of Disney" event is a separately ticketed event in Disney California Adventure running Thursdays through Mondays from 12PM-8PM.

July 2021

No Events Announced for this Month Yet

September 2021

No Events Announced for this Month Yet

December 2021

Nov. 11 - Dec. 9Disneyland Park : Disneyland Resort2021 Disney Merriest Nites
Nov. 14, 2021 - Jan. 9, 2022Disney California Adventure : Disneyland Resort2021 Disney Festival of Holidays at Disney California Adventure