September 21

==Theatrical releases==
===Shorts===
*1945 - Hockey Homicide
*1951 - Cold Turkey
==Television==
*1969 - Part 1 of The Wonderful World of Disney episode "My Dog, the Thief" premieres on NBC.
*1985
**The Wuzzles episode "Hooray for Hollywuz" premieres on CBS.
**The Adventures of the Gummi Bears episode "The Sinister Sculptor/Zummi Makes it Hot" premieres on NBC.
*1987 - The DuckTales episode "Send in the Clones" premieres in syndication.
*1989 - The DuckTales episode "The Good Muddahs" premieres in syndication.
*1990 - The TaleSpin episode "Stormy Weather" premieres in syndication.
*1991
**The New Adventures of Winnie the Pooh episode "A Pooh Day Afternoon" premieres on ABC.
**The Darkwing Duck episode "Negaduck" premieres on ABC.
*1992 - The Goof Troop episode "Where There's Smoke, There's Goof" premieres in syndication.
*1993 - The Bonkers episode "Weather or Not" premieres in syndication.
*1994 - The Aladdin episode "Mudder's Day" premieres in syndication.
*1995 - The Gargoyles episode "City of Stone (Part 4)" premieres in syndication.
*1996
**The Disney's Doug episode "Doug Grows Up" premieres on ABC.
**The Gargoyles: The Goliath Chronicles episode "Runaways" premieres on ABC.
**The Mighty Ducks episode "Phil in the Blank" premieres on ABC.
**The Timon & Pumbaa episode "Beetle Romania/Rumble in the Jungle" premieres on CBS.
*1997 - The Muppets Tonight episode "Heather Locklear" premieres on the Disney Channel.
*1998 - The Hercules episode "Hercules and the Bacchanal" premieres in syndication.
*2001
**The Legend of Tarzan episode "Tarzan and the Rough Rider" premieres on UPN and in syndication.
**The Lizzie McGuire episode "The Untitled Stan Jansen Project" premieres on Disney Channel.
**The Proud Family episodes "Strike" and "Rumors" premiere on the Disney Channel.
*2002 - The Fillmore! episode "Test of the Tested" premieres on ABC.
*2006 - The Handy Manny episodes "Rusty to the Rescue/Pinata Party" premiere on the Playhouse Disney.
*2007
**The Cory in the House season one finale "Never the Dwayne Shall Meet" premieres on the Disney Channel.
**The Hannah Montana episode "Don't Stop 'Til You Get the Phone" premieres on the Disney Channel.
*2008 - The Wizards of Waverly Place episode "Beware Wolf" premieres on the Disney Channel.
*2009 - The Phineas and Ferb episode "Phineas and Ferb's Quantum Boogaloo" premieres on Disney XD.
*2012 - The Fish Hooks episode "Principal Bea" premieres on the Disney Channel.
*2014
**The 7D episodes "The Jollywood Jam/Hildy the Good" premiere on Disney XD.
**The second season of Liv and Maddie premieres on the Disney Channel with the episode "Premiere-a-Rooney".
**The I Didn't Do It episode "Logan's Run" premieres on the Disney Channel.
**The Austin & Ally episode "Videos & Villains" premieres on the Disney Channel.
*2015
**The Gravity Falls episode "Roadside Attraction" premieres on Disney XD (later premiered on the Disney Channel on January 29, 2016).
**Star vs. the Forces of Evil concludes its first season on Disney XD with the episode "Storm the Castle".
**The Pickle and Peanut episodes "Pickle the Falcon Master/Pickle Adopts a Family" premiere on Disney XD.
*2017 - The Goldie & Bear episodes "Pops Goes the Weasel/Fairy Godmother Gets Grounded" premiere on the Disney Channel.
*2018
**The PJ Masks episodes "Powerpond Weed/Owlette Comes Clean" premiere on the Disney Channel.
**The Fancy Nancy episodes "Toodle-oo, Miss Moo/Nancy Clancy, Starmaker" premiere on the Disney Channel.
**The Elena of Avalor episode "Song of the Sirenas" premieres on Disney Jr.
**Bunk'd concludes its third season on the Disney Channel with the episode "Up, Up and Away".
**The Raven's Home episode "Sleevemore Part One: Frozen" premieres on the Disney Channel.
*2019 - The Lion Guard episode "Dragon Island" premieres on Disney Jr. (originally premiered on the DisneyNow app on August 3).
*2020
**The DuckTales episode "The Phantom and the Sorceress!" premieres on Disney XD.
**The third and final season of Big Hero 6: The Series premieres on Disney XD with the episode "The Hyper-Potamus Pizza-Party-Torium".
*2022 - Firebuds premieres on the Disney Channel and Disney Jr. with the episodes "Car in a Tree/Dalmatian Day" and "Hubcap Heist/Food Truck Fiasco".
*2024
**The Primos episodes "Summer of Segundos/Summer of Breaking Bud" premiere simultaneously on the Disney Channel and Disney XD. (originally released on Disney+ on September 11).
**The Hamster & Gretel episodes "Evil Upheaval/Ay, Ay, A.I." & "Stress Brawl/I Love Luchie" premiere simultaneously on the Disney Channel and Disney XD.
***Both episodes were originally released on Disney+ on September 18.
==Streaming==
*2022 - Andor premieres on Disney+ with the episodes "Kassa", "That Would Be Me", and "Reckoning".
==Online==
*2021 - The Big City Greens & Zombies Random Rings crossover short "Cricket Calls Zombies" is released on the Disney Channel's YouTube channel.
*2024 - The Primos Theme Song Takeover "T-Sisters" is released on the Disney Channel's YouTube channel.
==Laserdisc releases==
*1990 - The Little Mermaid
*1994 - Aladdin
==VHS & DVD releases==
*1990 - Peter Pan
*1999 - Doug's 1st Movie
*2004 - Felicity: Junior Year Collection: The Complete Third Season and Popular: First Season
*2010
**Desperate Housewives: The Complete Sixth Season (ABC Studios)
**Castle: The Complete Second Season (ABC Studios)
==DVD & Blu-ray releases==
*2010 - Tinker Bell and the Great Fairy Rescue
*2021 - Cruella
==Soundtrack releases==
*2010
**Imagination Movers: In a Big Warehouse
**Phineas and Ferb Holiday Favorites
==People==
===Births===
*1866 - H.G. Wells † (author, writer, novelist, teacher, historian, and journalist)
*1912 - Chuck Jones † (animator, author, screenwriter, producer, and director)
*1935 - Henry Gibson † (actor, voice actor, comedian, singer, and songwriter)
*1945 - Jerry Bruckheimer (producer)
*1950 - Bill Murray (actor, voice actor, comedian, and writer)
*1959 - Dave Coulier (stand-up comedian, actor, voice actor, impressionist, and television host)
*1962 - Rob Morrow (actor, voice actor, screenwriter, director, producer, singer, and songwriter)
*1965 - Cheryl Hines (actress, comedian, director, and producer)
*1971 - Luke Wilson (actor and comedian)
*1972 - Erin Fitzgerald (actress and voice actress)
*1983 - Joseph Mazzello (actor, director, and screenwriter)
*1985 - Doug Rockwell (songwriter, record producer, musician, singer, and composer)
*1989 - Wichayanee Pearklin (singer, actress, and television host)
*1990 - Allison Scagliotti (actress, musician, and director)
===Deaths===
*1974 - Walter Brennan (actor)
*2012 - Michael Rye (actor and voice actor)
*2021 - Willie Garson (actor)
==Other==
*2010 - Tinker Bell receives her very own star on the Hollywood Walk of Fame.
pt-br:21 de Setembro
Category:Days in Disney history