All Closures and Refurbishments at Disneyland during August and December of 2016, 2017 and 2021

August 2016

January 2015 - N/AHollywood Land : Disney California AdventureMuppet*Vision 3D closed indefinitely. The theater has been renamed the Sunset Showcase. From July 1- August 14 the theater will host a preview of Pete's Dragon.
Jan. 10 - Jul. 29Frontierland : Disneyland ParkRivers of America Attractions Disneyland Railroad and most Rivers of America attractions (including Fantasmic!) are closed temporarily to make room for the construction of the new Star Wars land. Pirate's Lair on Tom Sawyer Island has re-opened. Fantasmic! opens on July 17. Davy Crockett Explorer Canoes, Mark Twain Riverboat, Sailing Ship Columbia and Disneyland Railroad reopen on July 29.
Aug. 08 - Aug. 26Pixar Pier : Disney California AdventureKing Triton's Carousel Refurbishment
Aug. 22 - Sep. 08New Orleans Square : Disneyland ParkHaunted Mansion Short refurbishment to apply the Nightmare Before Christmas overlay for the Halloween and Christmas seasons. Re-opens on September 9.
Aug. 22 - Sep. 29Main Street, U.S.A. : Disneyland ParkGreat Moments with Mr. Lincoln Refurbishment.
Aug. 29 - Sep. 01Hollywood Land : Disney California AdventureTwilight Zone Tower of Tower Refurbishment

December 2016

Jan. 10 - Jul. 29Frontierland : Disneyland ParkRivers of America Attractions Disneyland Railroad and most Rivers of America attractions (including Fantasmic!) are closed temporarily to make room for the construction of the new Star Wars land. Pirate's Lair on Tom Sawyer Island has re-opened. Fantasmic! opens on July 17. Davy Crockett Explorer Canoes, Mark Twain Riverboat, Sailing Ship Columbia and Disneyland Railroad reopen on July 29.
Sep. 11 - Sep. 15Paradise Pier Hotel : HotelsParadise Pool and Spa Closed for refurbishment

August 2017

Sep. 11 - Sep. 15Paradise Pier Hotel : HotelsParadise Pool and Spa Closed for refurbishment
Jan. 08 - Fall 2017Grand Californian : HotelsRoom Refurbishments Rooms at the Grand Californian will be undergoing refurbishment through the fall of 2017.
June 2017 - Early AugustGrand Californian : HotelsGreat Hall Refurbishment During the refurbishment of the Great Hall lobby, access will be limited, and some guest rooms will be unavailable.
Early August 2017 - Early OctoberGrand Californian : HotelsCraftsman's Club Concierge Lounge Relocation The concierge lounge will be temporarily relocated from early August through early October.
Aug. 14 - Aug. 17Frontierland : Disneyland ParkBig Thunder Mountain Railroad Closed for refurbishment
Aug. 2015 - May. 31Disneyland Park : Disneyland ResortStar Wars: Galaxy's Edge The 14-acre Star Wars-themed land that was announced during the 2015 D23 EXPO opens at Disneyland on May 31.
Aug. 21 - Sep. 09Main Street, U.S.A. : Disneyland ParkLittle Red Wagon Closed for Refurbishment
Aug. 21 - Sep. 14Tomorrowland : Disneyland ParkSpace Mountain Closed for refurbishment and installation of Ghost Galaxy overlay.
Aug. 21 - Dec. 20Pixar Pier : Disney California AdventureGoofy's Sky School Closed for refurbishment
Aug. 28 - Sep. 14New Orleans Square : Disneyland ParkHaunted Mansion Closed for installation of holiday overlay.
Aug. 28 - Aug. 31Frontierland : Disneyland ParkFrontierland Shootin' Exposition Closed for refurbishment

December 2017

Aug. 2015 - May. 31Disneyland Park : Disneyland ResortStar Wars: Galaxy's Edge The 14-acre Star Wars-themed land that was announced during the 2015 D23 EXPO opens at Disneyland on May 31.
Aug. 21 - Dec. 20Pixar Pier : Disney California AdventureGoofy's Sky School Closed for refurbishment

August 2021

2019 - Early 2023Disneyland Park : Disneyland ResortMickey & Minnie's Runaway Railway (DLR) The first major Mickey-themed ride-through attraction, is coming to Disneyland’s Mickey’s Toontown in Early 2023 as part of the reimagination of Mickey’s Toontown. The ride will be housed in the El CapiTOON Theater, where Mickey and Minnie are premiering their newest short, Perfect Picnic.
March 14th, 2020 - July 25th, 2022Disneyland Park : Disneyland ResortFinding Nemo Submarine Voyage Finding Nemo Submarine Voyage closed for refurbishment on March 14th, 2020. It will reopen on July 25th, 2022.

December 2021

2019 - Early 2023Disneyland Park : Disneyland ResortMickey & Minnie's Runaway Railway (DLR) The first major Mickey-themed ride-through attraction, is coming to Disneyland’s Mickey’s Toontown in Early 2023 as part of the reimagination of Mickey’s Toontown. The ride will be housed in the El CapiTOON Theater, where Mickey and Minnie are premiering their newest short, Perfect Picnic.
March 14th, 2020 - July 25th, 2022Disneyland Park : Disneyland ResortFinding Nemo Submarine Voyage Finding Nemo Submarine Voyage closed for refurbishment on March 14th, 2020. It will reopen on July 25th, 2022.
Oct. 4, 2021 - Nov. 10th, 2023Disneyland Park : Disneyland ResortTarzan's Treehouse Tarzan's Treehouse will close for refurbishment beginning October 4th, 2021. Disney has revealed that the attraction is being rethemed to an adapted version of the original Swiss Family Treehouse concept that Walt and his Imagineers envisioned in 1962.
Nov. 11 - Dec. 4Disneyland Park : Disneyland Resort"it's a small world" Holiday "it's a small world" Holiday is reportedly closed due to flooding. It is expected to reopen December 4th, 2021.