All Closures and Refurbishments at Disneyland Park in Disneyland during September and December of 2017 and 2021

September 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 - 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. 28 - Sep. 14New Orleans Square : Disneyland ParkHaunted Mansion Closed for installation of holiday overlay.
Sep. 05 - Nov. 20Frontierland : Disneyland ParkRiver Belle Terrace Closed for refurbishment
Sep. 11 - Sep. 13Main Street, U.S.A. : Disneyland ParkPlaza Inn Closed for refurbishment
Sep. 18 - Sep. 22Tomorrowland : Disneyland ParkFinding Nemo Submarine Voyage Closed for refurbishment
Sep. 25 - Sep. 26Tomorrowland : Disneyland ParkBuzz Lightyear Astro Blasters Closed for refurbishment
Sep. 25 - Sep. 28Main Street, U.S.A. : Disneyland ParkMain Street Cinema 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.

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.

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.