All Events at Disneyland during August and December of 2017 and 2021

August 2017

Jan. 20 - Aug. 20Disneyland Park : Disneyland ResortMain Street Electrical Parade The Main Street Electrical Parade moves from Florida to California for a limited encore engagement at Disneyland in 2017. The parade was originally scheduled to run until June 18, but has been extended through August 20.
Feb. 24 - End date not yet announcedFantasyland : Disneyland ParkRed Rose Taverne For a limited time, the Village Haus Restaurant in Fantasyland has been transformed into the Red Rose Taverne, with a menu and decor inspired by the new live action Beauty and the Beast movie.
May. 27 - Sep. 10Disney California Adventure : Disneyland ResortSummer of Heroes Limited time offerings from May 27-September 10 include: Avengers Training Initiative - young recruits assemble with Black Widow and Hawkeye; Black Widow Encounter; Special themed merchandise and food in Hollywood Land

December 2017

Feb. 24 - End date not yet announcedFantasyland : Disneyland ParkRed Rose Taverne For a limited time, the Village Haus Restaurant in Fantasyland has been transformed into the Red Rose Taverne, with a menu and decor inspired by the new live action Beauty and the Beast movie.
Nov. 03 - Jan. 07a bug's land : Disney California AdventureSneak Peek of "Coco" A sneak peek with enhanced effects of the film "Coco" will be shown in the "It's Tough to Be a Bug" Theater. The movie opens in theaters on November 22.
Nov. 10 - Jan. 07Resort Wide : Disneyland ResortHolidays at the Disneyland Resort Returning favorites during the November 10, 2017 to January 7, 2018 holiday celebration include "A Christmas Fantasy" Parade and "Believe...in Holiday Magic" fireworks at Disneyland and "World of Color - Season of Light", "Viva Navidad!", and "Festival of Holidays" at Disney California Adventure.
Nov. 10 - Jan. 07Disney California Adventure : Disneyland ResortFestival of Holidays Returns for the 2017 holiday season with special entertainment and food and beverage kiosks celebrating holiday traditions around the world.

August 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