All Closures and Refurbishments at Disneyland during April and September of 2015 and 2021

April 2015

Early 2015 - Oct. 02Disney California Adventure : Disneyland ResortBlue Sky Cellar closed indefinitely
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.
Early 2015 - Summer 2015Condor Flats : Disney California AdventureFly 'n' Buy
Early 2015 - Mar. 07Cars Land : Disney California AdventureLuigi's Flying Tires Will be replaced by Luigi's Rollickin' Roadsters. Scheduled to open 3/7/16.
Early 2015 - Apr. 10Tomorrowland : Disneyland ParkMagic Eye Theater The theater house the sneak preview of the upcoming film "Tomorrowland." This sneak peek will play every 15-20 minutes throughout the day. No FastPass+ will be available. It's not known at this time whether Captain EO will return when the sneak preview is over.
Early 2015 - Apr. 02Critter Country : Disneyland ParkHungry Bear Restaurant
Jan. 06 - May. 14Condor Flats : Disney California AdventureSoarin' Over California
Jan. 07 - May. 16Fantasyland : Disneyland ParkMatterhorn
Feb. 02 - Jul. 02Fantasyland : Disneyland ParkPeter Pan's Flight
Feb. 15 - Mar. 15Grizzly Peak : Disney California AdventureGrizzly River Run Closed for refurbishment.
Apr. 01 - 2016Tomorrowland : Disneyland ParkInnoventions
Apr. 20 - May. 01Adventureland : Disneyland ParkIndiana Jones Adventure
Apr. 27 - May. 01Grand Californian : HotelsFountain Pool

September 2015

Early 2015 - Oct. 02Disney California Adventure : Disneyland ResortBlue Sky Cellar closed indefinitely
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.
Early 2015 - Mar. 07Cars Land : Disney California AdventureLuigi's Flying Tires Will be replaced by Luigi's Rollickin' Roadsters. Scheduled to open 3/7/16.
Feb. 15 - Mar. 15Grizzly Peak : Disney California AdventureGrizzly River Run Closed for refurbishment.
Apr. 01 - 2016Tomorrowland : Disneyland ParkInnoventions

April 2021

May. 30 - No details availableDowntown Disney : Downtown DisneyDowntown Disney West End Closures The following Downtown Disney locations closed in preparation for the construction of a proposed new hotel which has since been canceled. No details on what might be going into the now available retail spaces.
 
AMC Theaters
ESPN Zone
Rainforest Cafe
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.

September 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.