All Events, Closures and Refurbishments at Disneyland Park or Downtown Disney in Disneyland during April of 2017, 2018 and 2021

April 2017

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.
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. 03 - End date not yet announcedDisneyland Park : Disneyland ResortRemember...Dreams Come True The Remember...Dreams Come True fireworks show, which celebrated Disneyland's 50th anniversary, returns for weekend performances starting February 3. The show is expected to continue through the spring season.
Feb. 06 - Apr. 27Fantasyland : Disneyland ParkMatterhorn Bobsleds Closed for refurbishment and addition of Fastpass.
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.
Mar. 16 - End date not yet announcedNew Orleans Square : Disneyland ParkPirates of the Caribbean Attraction 50th Anniversary To celebrate the 50th anniversary of Pirates of the Caribbean, special food and beverage items, pirate-themed entertainment and exclusive merchandise will be available starting on March 16. Participating restaurants include Blue Bayou, Cafe Orleans, Royal Street Veranda, Mint Julep Bar, Harbour Galley, and churro cart.

April 2018

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.
Jan. 02 - Apr. 13Critter Country : Disneyland ParkSplash Mountain Closed for refurbishment
Jan. 08 - Apr. 26Fantasyland : Disneyland ParkDumbo the Flying Elephant Closed for refurbishment, including queue relocation and construction of a shade structure
Early 2018 - Fall 2018Downtown Disney : Downtown DisneyWorld of Disney During the lengthy re-imagining project, half of the store is closed while the other half remains open to guests. The initial remodeling phase of the western half of the store is complete and it has re-opened. The eastern half is now closed.
Apr. 16 - Apr. 19Fantasyland : Disneyland ParkMatterhorn Bobsleds Closed for refurbishment
Apr. 23 - Jun. 07New Orleans Square : Disneyland ParkPirates of the Caribbean Closed for refurbishment, including modifications to the auction scene replacing the sale of "brides" with valuables, with the "Red Head" as the auctioneer.

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.
Mar. 14, 2020 - TBDDisneyland Park : Disneyland ResortFinding Nemo Submarine Voyage Finding Nemo Submarine Voyage will close for refurbishment beginning March 14th, 2021. A reopening date has not yet been announced.