October
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October, is the tenth month of the year in the Gregorian calendar and the month where many humans engage in a form of transformation. The following events took place in the month of October:
- 1954 — Masahiko Tanaka (Japanese voice of Cybertron Backstop) is born.
- 1957 — Altuğ Yücel (Turkish voice of Bumblebee) is born.
- 1958 — Marvel Comics editor Don Daley is born.
- 1958 — Stefan Krause (German voice of Chaos) is born.
- 1958 — LG Electronics (Autobot Stronghold publisher) is founded in South Korea.
- 1961 — Japanese animation director Akira Nishimori is born.
- 1963 — Marc Bretonnière (French voice of Prowl, Major Reynolds and both Optimus Prime & Megatron in the Battlegrounds game) is born.
- 1971 — Márcia Regina (Brazilian voice of Arcee and voice director of Robots In Disguise) is born.
- 1976 — Giuliana Jakobeit (German voice of Dani Burns) is born.
- 1978 — Bayu Oktara (Indonesian voice of Lucas Flannery) is born.
- 1979 — Activision, who would spend a decade producing Transformers video games, is founded.
- 1985 — The Transformers episode "Changing Gears" premieres in the US.
- 1986 — The Transformers episode "Dark Awakening" premieres in the US.
- 1987 — The Headmasters Hit Song Collection soundtrack album is released in Japan by Columbia Music Entertainment.
- 1988 — Transformers #186 - "Space Pirates! Part 5" is released in the United Kingdom by Marvel Comics.
- 1992 — Cartoon Network begins broadcasting in the US.
- 1997 — The Beast Wars episode "Enter the Super Robot Lifeform Transformers!!" premieres in Japan.
- 1999 — Transformers: Beast Wars Metals 64 for the Nintendo 64 is released in Japan.
- 2003 — The Armada episode "Union" premieres in the United Kingdom.
- 2003 — Micron Legend—Volume 6 is released on DVD in Japan by Columbia Music Entertainment, coming with the "Linkage Part 6" mini-comic and exclusive Combusta toy.
- 2005 — Zigzag is added to the Megalo Micron campaign in Japan.
- 2005 — The Galaxy Force episode "Breaking Through the Super Space-Time Tunnel" premieres in Japan.
- 2006 — Final day of BotCon 2006. Panels, "Faction Feud".
- 2007 — The Transformers: The Movie is released on Blu-ray in the UK by Metrodome.
- 2008 — Best of UK: Time Wars #3, More than Meets the Eye Vol 1 TPB and Saga of the Allspark #4 are released by IDW Publishing.
- 2008 — The Animated episode "Megatron Rising - Part 2" premieres in France.
- 2009 — "Day One" of preproduction work on Transformers: Dark of the Moon.
- 2010 — Fun Publications releases "Mega Spice" to Youtube.
- 2011 — Dark of the Moon Human Alliance Roadbuster and Leadfoot, Ultimate Optimus Prime, and Cyberverse Guzzle, Mudflap and Crowbar are released in Japan.
- 2011 — The Prime episode "One Shall Rise, Part 1" premieres in the US.
- 2011 — The Transformers: Prime episode Darkness Rising, Part 5 premieres in Italy.
- 2013 — The Transformers: Prime episode "Scattered" premieres in Germany.
- 2014 — The Transformers: Windblade TPB is released by IDW Publishing.
- 2015 — Go90 launches.
- 2015 — The Robots in Disguise episode "Similarly Different" premieres in Hungary.
- 2016 — The Rescue Bots episode "A Brush with Danger" premieres on Discovery Family.
- 2016 — The Robots in Disguise episode "Mighty Big Trouble" premieres on Teletoon in Canada.
- 2016 — The Rescue Bots episode "Rescue Bots Academy" premieres in Hungary.
- 2020 — Transformers Collaborative Gigawatt is made available for order via Hasbro Pulse and "other select retailers".
- 2022 — The second day of Hasbro Pulse Con 2022, no new Transformers content on this day though.
- 2023 — A special one-day screening of Transformers Beast Wars and Beast Wars II is held at the Maruhan Ikebukuro building in Tokyo, Japan.
- 2023 — Transformers: EarthSpark makes its Japanese dub premiere on TV Tokyo with "Secret Treasure"..
- 2023 —The Transformers: EarthSpark episode "Stowed Away, Stowaways" premieres in France.
- 2023 —The Transformers: EarthSpark episode "The Last Hope, Part 1" premieres in Hungary.
- 2025 — Numerous Transformers products are revealed at Wonderfest Shanghai 2025.
- 1938 — Daniel Gall (French voice of Hot Rod/Rodimus Prime in The Transformers: The Movie) is born.
- 1941 — Marcel Guido (French voice of Megatron/Galvatron in The Transformers: The Movie) is born.
- 1956 — Charlie Adler (English voice of Silverbolt, Triggerhappy and Starscream) is born. Hello, It's Me!
- 1960 — Mecha designer Shinji Aramaki is born.
- 1962 — Jeff Glen Bennett (English voice of Prowl, Captain Fanzone, Ultra Magnus, Soundwave, Mixmaster and more) is born to do the Monkey.
- 1965 — Gerardo Reyero (Latin American-Spanish voice of Optimus Prime, Doctor Morocco, James Savoy, Skylynx, One Alpha Trion and more) is born.
- 1983 — Kōsuke Gotō (Japanese voice of Underbite) is born.
- 1984 — The Transformers #3: "Prisoner of War!" is released in the U.S. by Marvel Comics.
- 1984 — Michael Wiesner (German voice of Tricerashot) is born.
- 1985 — The Transformers episode "A Prime Problem" premieres in the US.
- 1986 — The Transformers episode "Starscream's Ghost" premieres in the US.
- 1987 — The Headmasters episode "Head On!! Fortress Maximus" premieres in Japan.
- 1988 — Ivan Zaytsev (Italian voice of Bumblebee in Bumblebee) is born.
- 1998 — The original release date of the Furby toys.
- 1999 — The Beast Machines episode "Fires of the Past" premieres in the US.
- 2003 — The Armada episode "Origin" has its world premiere in the UK.
- 2006 — The Cybertron episode "Inferno" premieres in the US.
- 2008 — TakaraTomy releases Henkei! Henkei! Transformers USA Editions Onslaught, Powerglide and Silverbolt.
- 2010 — The Animated episode "Sari's Secret" premieres in Japan.
- 2010 — Animated Oil Slick, Armorhide, purple Shockwave, Leader-class Bulkhead, Roll Out Command Optimus Prime, and Activators Optimus Prime, Megatron, Ratchet, Lockdown, Bumblebee, Grimlock, Bulkhead, and Starscream are released in Japan.
- 2012 — The Transformers: Rescue Bots: "Roll to the Rescue" compilation DVD is released in the US by Shout! Factory.
- 2012 — The Prime episode "One Shall Rise, Part 1" premieres in Indonesia.
- 2013 — The Transformers: Prime episode "Prey" premieres in Germany.
- 2013 — Transformers Prime — Stagione 1 Vol. 5: One Shall Stand is released to home media in Italy by Universal Pictures IT.
- 2014 — Transformers Cloud: Spacetime World: Guardians of Time Chapter 4: Part 2 is first published.
- 2015 — Transformers Prime: Beast Hunters — Intégrale Saison 3 is released to home media in France by Primal Screen.
- 2015 — The Robots in Disguise episode "The Buzz on Windblade" premieres in Hungary
- 2016 — The Robots in Disguise episodes "Decepticon Island (Part 2)" premieres in Japan.
- 2016 — The Rescue Bots episode "A New Hero" premieres in Hungary.
- 2017 — The Rescue Bots episode "The More Things Stay the Same" premieres in Italy.
- 2019 — Transformers/Ghostbusters #5 is released by IDW Publishing. Transformers: The Definitive G1 Collection Volume 56: City on Fire is released by Hachette Publishing.
- 2023 — Yolopark reveals a plethora of Transformers products at Shanghai Wonderfest 2023.
- 2025 — Walmart.com officially reveals the Transformers Retro Autobot Wheelie and Autobot Outback.
- 2025 — Thomas Wolff (German voice of a Member of Dynasty of Primes) dies at age 74.
- 1944 — Diego Reggente (Italian voice of Generation 1 Optimus Prime and Cybertron Sideways) is born.
- 1945 — Hans-Rainer Müller (German voice of Cyclonus, Bumblebee and a bunch of others he did for one episode each) is born.
- 1949 — Luca Biagini (Italian voice of Megatron in the live-action film series) is born.
- 1951 — Sérgio Stern (Brazillian voice of Thrust, Mirage, Wheelie and more) is born.
- 1951 — Claudine Chatel (Canadian French voice of Judy Witwicky and Shatter) is born.
- 1952 — Hwan-jin Kim (Korean voice of Rattrap and Gelshark) is born.
- 1967 — Artist Rob Liefeld is born.
- 1973 — Richard Ian Cox (voice of Cybertron Scattorshot) is born. Sit!
- 1973 — Keiko Agena (Mearing's aide in Dark of the Moon) is born.
- 1982 — Don Devendorf participates in the 6 Hours of Fuji race driving the #38 Datsun 280ZX Turbo, the car that would go on to be the basis of the original Smokescreen toy.
- 1982 — Super Dimension Fortress Macross debuts on Japanese television, featuring the transforming VF-1 Valkyrie fighter jet. This vehicle will go on to be less known in the West as the Transformer Jetfire.
- 1985 — The Transformers episode "Atlantis, Arise!" premieres in the US.
- 1986 — The Fight! Super Robot Lifeform Transformers episode "Incaic Jewel" premieres in Japan.
- 1988 — Arturo Castañeda (Latin-American Spanish voice of Miles Lancaster, Jack Darby, Shane Dyson and Sideswipe) is born.
- 1989 — The Victory episode "Awaken! Victory Leo" premieres in Japan.
- 1989 — The Transformers: The Movie premieres in South Korea on KBS.
- 1992 — Masza Wągrocka (Polish voice of Airachnid) is born.
- 2003 — The Legends of the Microns episode "悔恨 (あせり) - remorse" premieres in Japan.
- 2003 — The Armada series finale "Mortal Combat" has its world premiere in the UK.
- 2003 — The Armada episode "Threaten" premieres in the US.
- 2006 — The "Lyrian Moe-tchao" program changes formats, becoming the "Transformers Kiss Play: Transformers News Center", featuring the 27th installment of the Kiss Players radio drama series.
- 2007 — Devastation #1, Beast Wars Sourcebook #1 and Beast Wars: The Ascending #1 are released by IDW Publishing.
- 2008 — The Fun Publications Club-exclusive Seacons begin shipping.
- 2011 — The Transformers: Prime episode "Speed Metal" premieres in South Korea.
- 2012 — Transformers Prime Volume 4 — Strength in Numbers is released on DVD and Blu-ray in Australia and New Zealand by Madman Entertainment.
- 2012 — The Transformers: Prime episode "One Shall Rise, Part 2" premieres in Indonesia.
- 2013 — TakaraTomy releases Masterpiece MP-11A Acid Storm.
- 2015 — The first BotCon 2016 box set exclusive Ravage is revealed.
- 2016 — The Rescue Bots episode "Four-Legged Hero" premieres in Hungary.
- 2017 — The Rescue Bots episode "King Burns" premieres in Italy.
- 2018 — Transformers: Bumblebee Movie Prequel: #4 is released by IDW Publishing.
- 2018 — Transformers: The Definitive G1 Collection: Volume 28: Worlds Collide, Part 2 is released by Hachette Partworks.
- 2018 — "Transformers: Robots in Disguise: Combiner Force - "Combine & Conquer" is released on home media by Beyond Home Entertainment in Australia.
- 2021 — Gunnar Ernblad (Swedish voice of Optimus Prime, Starscream and more) dies at age 75.
- 2024 — The "Bring the Universe Together in Tachikawa! The Best Sound Screening" of Transformers One happens at Tachikawa Cinema City in Tokyo with Yoshikazu Iwanami and Ryōka Yuzuki in attendence.
- ???? — Itaru Yamamoto (Japanese voice of Soundwave) is born.
- 1957 — Bill Fagerbakke (voice of Animated Bulkhead, Master Disaster and Hot Shot) is born to know if Mayonnaise is an instrument.
- 1978 — Comic colorist Jesus Aburtov is born.
- 1979 — Ezequiel Serrano (Latin American voice of Unicron Trilogy Hot Shot) is born.
- 1985 — The Transformers episode "Attack of the Autobots" premieres in the US.
- 1988 — The Super-God Masterforce episode "Expose the Decepticons' Dark Trap!" premieres in Japan.
- 1990 — Sam Witwicky is born.
- 1991 — Patrick Keller (German voice of Slipstream in Robots in Disguise and Bumblebee in Transformers: EarthSpark - Expedition) is born.
- 1992 — The Headmasters episode "The Dormant Volcano Erupts Again" airs in Malaysia.
- 1993 — Tempo Video releases The Biggest Ever Saturday Morning Heroes on VHS in the UK, which contains the Transformers episode "Starscream's Brigade".
- 2000 — The Car Robots episode "Desperate Situation! 3 Car Robo Brothers" premieres in Japan.
- 2002 — The Armada episode "Jungle" premieres in the US.
- 2003 — The Armada episode "Comrade" premieres in France.
- 2006 — Generations #8 is released by IDW Publishing.
- 2008 — The Transformers Animated episode "Garbage In, Garbage Out" premieres in Latin America.
- 2008 — The Animated episode "The Elite Guard" premieres in France.
- 2011 — Transformers: Exiles, the sequel to Transformers: Exodus, hits bookstores.
- 2011 — The Beast Wars: Seasons 2 & 3 DVD set is released in the US by Shout! Studios.
- 2011 — The Transformers: Prime episode "Predatory" premieres in South Korea.
- 2013 — Predacons Rising, a TV movie concluding Transformers: Prime, aired on the Hub Network and also premieres in Indonesia.
- 2013 — The Transformers: Prime episodes "Darkmount, NV" and "Rebellion" premieres in Brazil.
- 2013 — "Asteroid Attack" is first published by Eaglemoss/GE Fabbri in Russia.
- 2015 — The Robots in Disguise episode "Some Body, Any Body" premieres in Japan.
- 2016 — "Lively Pursuit" is released by Fun Publications.
- 2016 — The Rescue Bots episode "Endangered Species" premieres in Hungary.
- 2017 — Transformers: The Definitive G1 Collection: Volume 46: Things Fall Apart is released by Hachette Partworks.
- 2017 — The Rescue Bots episodes "Pizza Pi Party" and "Uninvited Guest" premiere in Italy
- 2019 — The Generations Selects Special Comic Seacons comic 5 is first published.
- 2019 — The Cyberverse episode "Dark Birth" premieres on the Cartoon Network app in the U.S..
- 2021 — The Transformers: Cyberverse episodes "The End Of The Universe II", "The End Of The Universe III" and "The End Of The Universe IV" premiere in Brazil.
- 2022 — Hasbro has it's 2022 Investor Day confirming Transformers: EarthSpark has been renewed for a second season as well as renewing their contracts with Paramount for another 5 years.
- 2022 — Overwatch 2 is launched.
- 2023 — Transformers #1 is released by Image Comics and Skybound Entertainment.
- 2023 — Transformers: Beast Awakening is released on digital in Japan.
- 2024 — "Exclusive First Look! Transformers: Legacy Robots in Disguise 2001 Omega Prime HasLab EP-1 Sample!" is uploaded onto Hasbro Pulse's YouTube.
- 2025 — The Cyberworld episode "A Bug's Lie" premieres on YouTube.
- ???? — Ricardo Telles (Brazilian voice of the Narrator in Armada and Cliffjumper) is born.
- 1943 — Designer and animator Ernie Guanlao is born in the Philippines.
- 1947 — Wolfgang Mascher (German voice of Spike Witwicky and more) is born.
- 1949 — Michael Brennicke (German voice of the Narrator in Armada) is born.
- 1955 — Kōki Kataoka (voice of Meister, Lambor, Drag Stripe and more) is born.
- 1957 — Actor Bernie Mac (Bobby Bolivia in Transformers) is born.
- 1964 — Keiji Fujiwara (Japanese voice of Dinobot, Scavenger, Grimlock and both Prime Megatron and Q-Transformers Generation 1 Megatron) is born.
- 1965 — Sven Hasper (German voice of Percival and War for Cybertron Trilogy Wheeljack) is born.
- 1965 — Carlos Comério (Brazilian voice of Oracle) is born.
- 1971 — Sam Vincent (voice of Side Swipe, Coby Hansen, Menasor and more) is born. Intriguing!
- 1972 — Movie screenwriter Ehren Kruger is born.
- 1975 — Writer Chris "Doc" Wyatt is born.
- 1985 — Orson Welles records his lines as Unicron for The Transformers: The Movie. He would die five days later.
- 1987 — Yvonne Greitzke (German voice of Jillian Robinson) is born.
- 1987 — Josué Galinari (Brazilian voice of Ratchet) is born.
- 1989 — Kenshō Ono (voice of Q-Transformers Hot Rod) is born.
- 1991 — Daniele Di Matteo (Italian voice of Cliffjumper in Bumblebee) is born.
- 1992 — Writer Isabel Galupo is born.
- 1995 — Voice actress Linda Gary dies of brain cancer at age 50.
- 1999 — The Transformers: The Movie is released on VHS in the US by Rhino Entertainment.
- 2005 — Diomedea is founded.
- 2008 — The Animated episode "The Return of the Headmaster" premieres in France.
- 2011 — The Transformers #27 is released by IDW Publishing.
- 2014 — Final day of Transformers 30th Anniversary Exhibition at the Venetian, Macau.
- 2015 — The Robots in Disguise episode "Ghosts and Impostors" premieres in Hungary.
- 2016 — More than Meets the Eye Vol. 10 TPB, Revolution: The Road To Revolution 100-Page Special, Revolution #2, and The Transformers Vol. 10 TPB are released by IDW Publishing.
- 2016 — The Rescue Bots episode "More than Meets the Eye" premieres in Hungary
- 2017 — Titans Return Grotusque is released on Hasbro Toy Shop.
- 2017 — The Rescue Bots episodes "Camp Cody" and "Once Upon a Time" premiere in Italy.
- 2018 — The Cyberverse episode "Megatron Is My Hero" airs on the Cartoon Network app and website.
- 2019 — The Rescue Bots Academy episodes "Buddy Cop" and "Escape From Penguin Island" premiere on Discovery Family.
- 2019 — The Cyberverse episode "Trials" premiere on the Cartoon Network in the U.S..
- 2019 — The Cyberverse episodes "Trials" premieres in Germany.
- 2019 — HasLab's War for Cybertron: Siege Unicron project passes its end goal of 8000 backers, officially confirming its production.
- 2022 — Transformers Beyond Reality is released for PlayStation in Europe and Australia.
- 2023 — Transformers: Rise of the Beasts is released on digital in France.
- 2023 — The Walmart Exclusive Transformers 40th Anniversary Retro Reissues Blaster And Soundwave are revealed.
- 2023 — Reinaldo Pimenta (Brazilian voice of Mindwipe, Bill O'Reilly and Edmund Burton) dies at age 77.
- 2024 — The Transformers: EarthSpark episode "In Ruins" premieres on Nickelodeon in the United States.
- 1946 — John Hostetter (Ramhorn on The Transformers) is born.
- 1958 — Editor Michael Carlin is born.
- 1972 — Pascal Nowak (French voice of Alex Malto in Transformers: EarthSpark) is born.
- 1977 — Yūki Tai (Japanese voice of Wheeljack, Vehicon, Makeshift and Kickback) is born.
- 1984 — The Transformers episode "Transport to Oblivion" premieres in the US.
- 1986 — The Transformers episode "Thief in the Night" premieres in the US.
- 1986 — Alexander Vestri (Brazilian voice of Hammerbyte) is born.
- 1991 — The Victory episode "The Reactivation of the Space Headquarters" premieres in Malaysia.
- 1999 — The Beast Wars Metals episode "We're Back!" airs in Japan.
- 2001 — The 2001 Robots in Disguise cartoon episode "Ultra Magnus" premieres in the US.
- 2009 — The Animated episode "Transwarped Part 1" premieres in Latin America.
- 2010 — The Transformers: Drift #3 and Transformers: The IDW Collection Volume 2 are released by IDW Publishing.
- 2011 — "My Ride Is Better than Your Ride" is uploaded to the Transformers YouTube page.
- 2011 — Transformers: Dark of the Moon is released on DVD in Brazil.
- 2012 — The Super Robot Lifeform Transformers: Prime episode "Forgotten Transformation! Optimus Has Become a Decepticon" premieres in Japan.
- 2015 — Transformers: Devastation is released in North America.
- 2015 — The servers for Transformers Legends finally shut down, rendering the game unplayable.
- 2015 — Transformers Prime: Beast Hunters — Predacons Rising is released to home media in France by Primal Screen.
- 2015 — The Robots in Disguise episode "Battlegrounds, Part 1" premieres in Hungary
- 2016 — The Rescue Bots episode "I Have Heard the Robots Singing" premieres in Hungary.
- 2018 — The Cyberverse episode "Megatron Is My Hero" airs on Cartoon Network.
- 2019 — The extended deadline for HasLab's War for Cybertron Trilogy Unicron project. The end goal was passed a day prior.
- 2019 — The Cyberverse episodes "Infinite Vendetta" and "I Am The Allspark" premieres in France.
- 2021 — HasLab's Star Saber project passes its tier 1 goal of 14,000 backers, officially unlocking the V-Lock Cannon and 6 Fire Blast effects.
- 2022 — Walmart has a Collector Con officially revealing Velocitron Speedia 500 Collection wave 2 and Transformers Retro Hot Rod and Starscream.
- 2023 — TakaraTomy officially reveals MP-59 Rhinox, Legacy United Silverbolt, Dramatic Capture Series Nemesis Bridge and BWVS-08 Phantom Confrontation Ghost Of Starscream vs Haunted Waspeeter.
- 2025 — Transformers Hall of Fame voting for 2025 ends.
- 1950 — Artist Howard Chaykin is born.
- 1958 — Katsuhiro Kitagawa (Japanese voice of Barricade and Ironhide) is born.
- 1960 — Naoki Tamanoi (Japanese voice of General Whalen and Executioner Knight) is born.
- 1972 — Sean Kenin Reyes (voice of EarthSpark Soundwave) is born.
- 1974 — Alexander Polinsky (voice of Henry Masterson/Headmaster) becomes a newb-born.
- 1975 — Makoto Aoki (voice of Blast Arm) is born.
- 1978 — Actor Omar Benson Miller (Glen's cousin in Transformers) is born.
- 1979 — Shawn Ashmore (actor who played Jake (Animorphs)) is born.
- 1982 — Natalia Romanko (Ukranian voice of Elita) is born.
- 1985 — The Transformers episode "Microbots" premieres in the US.
- 1988 — Marcos Miranda (Brazillian voice of Blitzwing, Bruticus, Dirge, Hoist, Kup, Swoop, Vector Sigma and more) dies at age 51.
- 1996 — The Beast Wars episode "Double Jeopardy" premieres in the US.
- 1998 — The Beast Wars II episode "The New Weapon, Tako Tank" premieres in Japan.
- 1999 — BAM! Entertainment is founded.
- 2000 — The Beast Machines episode "Sparkwar Pt. III: The Siege" premieres in the U.S. on Fox Kids.
- 2003 — The Cine-Manga First Encounter is released in the US by Tokyopop.
- 2005 — The Cybertron episode "Detour" premieres in the US.
- 2005 — Gasket Police-Type is made available exclusively at Japanese Toys"R"Us stores with the purchase of 4000 yen worth of Transformers product.
- 2009 — Best of UK: Prey #3 is released by IDW Publishing.
- 2010 — Publisher Kadokawa begins taking pre-orders for the Transformers Animated: The Cool - Special Edition comic compilation with exclusive clear Activators Optimus Prime.
- 2011 — The Transformers: Prime episode Darkness Rising, Part 3 premieres in Germany.
- 2013 — The Transformers: Prime episode "Darkmount, NV" premieres in Spain.
- 2013 — The Transformers: Prime episode "Chain of Command" premieres in Germany.
- 2014 — Age of Extinction: The Score is released on CD.
- 2015 — Robots in Disguise #3 and Transformers vs. G.I. Joe #9 are released by IDW Publishing.
- 2016 — The Rescue Bots episodes "Now and Then" premieres in Hungary.
- 2017 — The Robots in Disguise episode "Collateral Damage" premieres on Cartoon Network.
- 2017 — The Rescue Bots episode, "Cody's 11" and "A Brush with Danger" premieres in Italy.
- 2018 — Cyberverse episodes "Cube" and "Terminal Velocity" premieres on Teletoon in Canada.
- 2018 — The Transformers: Cyberverse episode "Fractured" premieres in France.
- 2020 — My Little Pony/Transformers: Friendship in Disguise! #3 and Transformers/Back to the Future #1 are released by IDW Publishing. Transformers: The Definitive G1 Collection: Volume 98: The World In Your Eyes is released by Hachette.
- 2020 — The Generations Selects Special Comic Abominus comic 1 is first published.
- 2020 — Composer Kyōhei Tsutsumi dies.
- 2023 —The Transformers: EarthSpark episode "The Last Hope, Part 2" premieres in Hungary.
- 2023 —The Transformers: EarthSpark episode "The Battle of Witwicky" premieres in France.
- ???? — Enrique Garduza (Latin American Spanish voice of Chip Chase, Cosmos, Kup, Wreck-Gar and voice director of Transformers: Rescue Bots Academy) is born.
- 1944 — Renzo Stacchi (Italian voice of Leadfoot) is born in Rome.
- 1945 — Bill Martin (voice of Broadside) is born.
- 1959 — Guilherme Lopes (Brazilian voice of Optimus Primal, William Fowler, Dropkick, Megatron and more) is born.
- 1985 — The Transformers episode "The Master Builders" premieres in the US.
- 1986 — The Transformers episode "Forever Is a Long Time Coming" premieres in the U.S.
- 1988 — Transformers #187: "Space Pirates! Part 6" is released in the UK by Marvel Comics.
- 1996 — The Beast Wars episode "A Better Mousetrap" premieres in the U.S.
- 1997 — The Beast Wars episode "Defeat the Destrons" premieres in Japan.
- 2000 — Víctor Mares (Latin American voice of Scourge, Sky Lynx, Deathsaurus and more) passes away at age 65.
- 2003 — War and Peace #6, War Within: The Dark Ages #1 and Transformers Armada #16 are released in the U.S. by Dreamwave Productions.
- 2004 — ~MAYUKO IWASA Edition~ Meister is relisted on Yahoo!Japan Auctions after complications arose following the auction that ended on September 26th. This second, successful auction would end October 15th.
- 2005 — The Galaxy Force episode "Megalo Convoy of Gigalonia" premieres in Japan.
- 2007 — The Transformers live-action movie ends its U.S. theatrical run, having grossed $310,578,372 (not including the IMAX take).
- 2008 — The Art of IDW's Transformers SC, The Arrival #3, Best of UK: Space Pirates TPB and Spotlight: Sideswipe are released by IDW Publishing.
- 2008 — The Animated episode "Mission Accomplished" premieres in France.
- 2010 — The Transformers: Animated volume 3 DVD is released by Paramount Japan.
- 2011 — The Transformers: Prime episode "One Shall Rise, Part 2" premieres on The Hub.
- 2012 — The Transformers: Prime episode "Orion Pax, Part 1" premieres in Italy.
- 2013 — Transformers Prime Beast Hunters: Predacons Rising is released on DVD and Blu-Ray by Shout! Factory in the US.
- 2013 — The Kre-O short "Carnival Face Off" is uploaded to YouTube.
- 2013 — The Transformers: Prime episode "Scattered" premieres in Spain.
- 2013 — The Transformers: Prime episode "Plus One" premieres in Germany.
- 2014 — Transformers vs. G.I. Joe #3 and Legacy: The Art of Transformers Packaging are released by IDW Publishing.
- 2014 — "Transformers Prime: Beast Hunters — Season 3 Volume 3: Omega Lock " is released to home media by Madman Entertainment in Australia and New Zealand.
- 2016 — The Rescue Bots episode "To Infinity... And Back" premieres on Discovery Family.
- 2016 — The Rescue Bots episode"Today and Forever" premieres in Hungary.
- 2016 — The Robots in Disguise episode "Mini-Con Madness" premieres on Teletoon in Canada.
- 2021 — HasLab's Star Saber project passes its tier 2 goal of 17,000 backers, officially unlocking a translucent blue flight stand bearing the Victory logo and the Autobot insignia that can support Victory Saber in either vehicle or robot mode.
- 2022 — The Making of Beast Wars panel at NYCC 2022.
- 2023 — The Transformers: EarthSpark episode "Friend?" premieres in Japan.
- 2023 — The Transformers: EarthSpark episode "The Last Hope, Part 1" premieres in France.
- 2024 — Super7 Deluxe VHS Megatron is revealed.
- 2025 — Transformers #25 and The Transformers Compendium Volume 2 TPB are released by Image Comics and Skybound Entertainment.
- 1936 — Henry König (German voice of Tigatron) is born.
- 1954 — Johan Hedenberg (Swedish voice of Sideways, Jetfire, Primus, Megatron and more) is born.
- 1957 — Yukari Nozawa (Japanese voice of Judy Witwicky) is born.
- 1970 — Composer Steve Jablonsky is born, no doubt accompanied by a rousing score.
- 1972 — Kōki Miyata (voice of Minitron) is born.
- 1976 — Sam Riegel (voice of Starscream in War for Cybertron) is born with a voice that gives him super-strength.
- 1978 — Sim Seung-han (Korean voice of Megatron, Thundercracker, Soundwave, Crosswise, Dirt Boss and Hardtop) is born.
- 1979 — Bump of Chicken bassist Chama is born.
- 1985 — The Transformers episode "The Insecticon Syndrome" premieres in the U.S.
- 1986 — The Transformers episode "Surprise Party" premieres in the U.S.
- 1987 — Erick Selim (Mexican voice of Lancelot, Bumblebee Brawn, War for Cybertron Trilogy Red Alert, Dead End, Reek and D-16) is born.
- 1987 — The Headmasters episode "Explosion on Mars!! Maximus Is in Danger" premieres in Japan.
- 1990 — Eduardo Ramírez (Latin American Spanish voice of Leo Spitz, Jetstorm, Sawtooth and Shamble) is born.
- 1999 — The Beast Machines episode "Mercenary Pursuits" premieres in the U.S.
- 2000 — The "3 S(uper) Car Robo Brother Set <Clear Version>", featuring exclusive versions of Super Mach Alert, Super Speedbreaker, and Super Wildride, is sold at the Super Festival.
- 2002 — The War Within #1 is released by Dreamwave Productions.
- 2003 — Armada Powerlinx Jetfire is released in Japan as a Toys"R"Us-exclusive "USA Edition".
- 2007 — Transformers: The Score is released by Warner Bros. Records.
- 2010 — The Animated episode "Sari, Transform!?" premieres in Japan.
- 2011 — The Prime episode "Scrapheap" premieres in Italy.
- 2012 — The Prime episode "Orion Pax, Part 2" premieres in Italy.
- 2013 — Regeneration One #0 (second printing), Robots in Disguise #21, and Classics, Vol. 6 are released by IDW Publishing.
- 2013 — The Prime episode "Prey" premieres in Spain.
- 2013 — The Prime episode "Thirst" premieres in Germany.
- 2014 — Cloud: Spacetime World: Guardians of Time Chapter 4: Part 3 is first released.
- 2015 — Devastation is released in Europe and Australia.
- 2015 — The second BotCon 2016 box set exclusive Predacon Tarantulas is revealed.
- 2020 — IDW Publishing announces the 2021 Beast Wars comic series.
- 2022 — The EarthSpark panel at NYCC 2022 confirms more cast members.
- 2024 — Scarlett #5 and Transformers #13 are released by Image Comics and Skybound Entertainment.
- 2024 — Transformers One is theatrically released in Belgium.
- 2025 — Preorders for the Armada Nemesis Prime and Air Defense Mini-Con Team multipack go up for Hasbro Pulse premium members.
- 1932 — Ron Feinberg (voice of Headstrong) is born.
- 1934 — Bert Kramer (voice of Computron) is born.
- 1943 — Reent Reins (German voice of Bryce and Charlie Burns) is born.
- 1943 — Frank-Otto Schenk (German voice of Ron Witwicky) is born.
- 1950 — Joachim Tennstedt (German voice of Bruce Brazos) is born.
- 1952 — Jesse Conde (Mexican voice of Cyberverse Alpha Trion and Lieutenant) is born.
- 1956 — Thomas Petruo (German voice of Paralon) is born.
- 1957 — David Lodge (voice of Midnight Express and Rail Racer) is born.
- 1958 — CG director Hiroyuki Hayashi is born.
- 1963 — Katarzyna Kozak (Polish voice of Realtor) is born.
- 1970 — Géraldine Asselin (voice director for the French dub of the War for Cybertron Trilogy) is born.
- 1972 — Norihisa Mori (voice of Scissor Boy) is born.
- 1985 — Orson Welles (voice of Unicron in The Transformers: The Movie) goes to a better place. A place filled with Mrs. Pell's Fish Sticks. Oh yes. They're even better when you're dead!
- 1985 — The Transformers episode "Day of the Machines" premieres in the US.
- 1985 — Leyla Rangel (Mexican voice of Sierra) is born.
- 1990 — Sam Witwicky is born to Ron and Judy Witwicky... maybe. Transformers
- 1994 — The Transformers episode "Divide and Conquer" premieres in Russia.
- 2000 — The Blockbuster exclusive Kid Rhino VHS tape containing the episodes "More Than Meets the Eye" parts 1–3, "Aerial Assault" and "Cosmic Rust" is released.
- 2003 — The Legends of the Microns episode "出立 (たびだち) - depart" premieres in Japan.
- 2003 — The Armada episode "Crisis" premieres in the US.
- 2005 — The Cybertron episode "Savage" premieres in the US.
- 2006 — The 28th show in the Kiss Players radio drama series airs in Japan on the "Transformers Kiss Play: Transformers News Center" program.
- 2007 — New Avengers/Transformers #4 is released by Marvel Comics and IDW Publishing.
- 2007 — The Art of IDW's Transformers in hardcover and Best of UK: Dinobots #2 are released by IDW Publishing.
- 2007 — Beast Machines — Season One: Volume One and Volume Two are released on DVD in New Zealand by Sony.
- 2008 — Storyboard artist Bob Smith dies.
- 2010 — Discovery Kids becomes The Hub, which will later broadcast Transformers: Prime and Transformers: Rescue Bots.
- 2011 — The Transformers: Prime episode "Sick Mind" premieres in South Korea.
- 2012 — The Transformers: Robots in Disguise #10 and The Transformers: Regeneration One #84 are released by IDW Publishing.
- 2012 — The retail version of Transformers Timelines #7 is released by Fun Publications.
- 2012 — One-time Transformers pitchman Alex Karras dies of kidney failure at age 77.
- 2012 — Ken Sansom (voice of Generation One Hound and Paul Gates) dies of a stroke at 85.
- 2012 — The Transformers Prime episode "Orion Pax, Part 3" premieres in Italy.
- 2012 — The Transformers: Prime episode "One Shall Fall" premieres in Indonesia
- 2013 — "Emergency! Hurry to the Base, Optimus!" is uploaded to the TakaraTomy Kre-O website.
- 2013 — The Transformers: Prime episode "Rebellion" premieres in Spain.
- 2013 — The Transformers: Prime episode "Evolution" premieres in Germany.
- 2014 — Final day of Transformers 30th Anniversary Exhibition at the Dongdaemun Design Plaza, Seoul, South Korea.
- 2016 — Kazunari Tanaka (Japanese voice of Cybertron Thundercracker) dies at age 49.
- 2017 — The Rescue Bots episodes "To Infinity... And Back" and "Family Business" premiere in Italy.
- 2018 — Transformers: Unicron #5 is released by IDW Publishing.
- 2020 — "The Bot Dance Off" is uploaded to YouTube.
- 2020 — The Transformers: Cyberverse episode "The Dead End" premieres in Germany.
- 2021 — The crowdfunding campaign for HasLab Victory Saber ends, having unlocked all three bonus tiers ten hours before closing time.
- 2021 — Hasbro CEO Brian Goldner steps down from his duties as Hasbro Chairman to go on medical leave. He would pass away only 2 days later.
- 2021 — The Hasbro Pulse mobile app launches.
- 2022 — Flame Toys begins preorders for Leo Prime.
- 2022 — Ayhan Kahya (Turkish dub voice of Optimus Prime) dies at age 64.
- 2023 — Transformers: Rise of the Beasts is released on Blu-Ray.
- 2024 — Hasbro officially reveals the NARUTO SHIPPUDEN x Transformers Kurama and Gamakichi set.
- 2024 — Walmart.com also reveals the Transformers Retro G1 Gears and Bumblebee.
- 2024 — Transformers One is theatrically released in Germany, Hungary and Slovakia.
- 2025 — The Hasbro Transformers Toy panel takes place at NYCC. Officially revealing the Timelines Age of Samurai Optimus Prime and Age of Samurai Starscream.
- 2025 — Preorders for the Walmart exclusive Transformers Retro Autobot Wheelie and Autobot Outback go up.
- 19?? — Musician Yoffy is born.
- 1946 — Antônio Moreno (Brazilian voice of Beast Wars Megatron, Prime Megatron and more) is born.
- 1954 — José María Carrero (Castillian Spanish voice of Cyclonus/Snow Cat, Blurr, Ironhide, Ransack, Leobreaker, Evac, Ratchet and more) is born.
- 1955 — Kyōko Tongū (voice of Holi) is born.
- 1964 — Hirohiko Kakegawa (Japanese voice of Frenzy in The Headmasters) is born.
- 1970 — Constance Zimmer (voice of Strongarm, Filch, Wingcode and more) is born.
- 1972 — Claudia Black (voice of Terratronus) is born.
- 1973 — Daisuke Sakaguchi (Japanese voice of Ped and Hishoumaru) is born, and wants Cinnamon Toast Crunch.
- 1975 — Rahmad Ilmanto (Indonesian voice of Burgertron in BotBots) is born.
- 1980 — Tomokazu Sugita (Japanese voice of Drift, Jazz and Q-Transformers Starscream) is born. Niiiiiiiiiice.
- 1982 — Kristy Wu (voice of Windblade on Robots in Disguise) is born.
- 1985 — The Fight! Super Robot Lifeform Transformers clip show episode "Birth of the Transformers!" premieres in Japan.
- 1988 — The Super-God Masterforce episode "Super Ginrai Gets Blown Away in the Desert!?" premieres in Japan.
- 1989 — Hugo Brunswick (European French voice of young Seymour Simmons in Bumblebee) is born.
- 1989 — Alexei Mayén (Mexican voice of Clown) is born.
- 1992 — The Headmasters episode "Fortress Maximus's Gigantic New Being!" airs in Malaysia.
- 2000 — The Car Robots episode "Invoke! Double Matrix" premieres in Japan.
- 2001 — The Robots in Disguise episode "The Secret of the Ruins" premieres in the US (wildly out of order).
- 2002 — The Armada episode "Carnival" premieres in the US.
- 2003 — The Armada episode "Soldier" premieres in France.
- 2004 — The Transformers — Season 1 is released on DVD in the UK by Metrodome, packaged with a Free Collector's Tin.
- 2005 — The Cybertron episode "Sand" premieres in the US.
- 2007 — Sony releases Transformers: Beast Machines: Die komplette Season 2 on DVD in Germany.
- 2008 — The Transformers Animated episode "Velocity" premieres in Latin America.
- 2008 — The Animated episode "Home Is Where the Spark Is" premieres in Italy.
- 2008 — The Animated episodes "Transform and Roll Out Part 1 and 2" premieres in Poland.
- 2008 — The Animated episode "Garbage In, Garbage Out" premieres in France.
- 2008 — Lorenzo Tarantelli (Brazilian voice of Kris Díaz) is born.
- 2009 — Jimmie Johnson wins the NASCAR Pepsi 500 at Auto Club Raceway in Pomona, California. Television coverage is sponsored by Transformers: Revenge of the Fallen, available on DVD on October 20th!
- 2010 — The My Chemical Romance promo single "The Only Hope for Me is You" is released by Reprise Records.
- 2010 — Writer Evan Somers dies at age 52.
- 2011 — The Transformers: Prime wave one toys officially released.
- 2011 — The Transformers: Prime episode "Out of His Head" premieres in South Korea.
- 2012 — The Transformers Prime episode "Operation Bumblebee, Part 1" premieres in Italy.
- 2013 — The Transformers: Prime episode "Scattered" premieres in Brazil.
- 2013 — The Transformers: Prime episode "Minus One" premieres in Germany.
- 2015 — The Robots in Disguise episode "One of Our Mini-Cons Is Missing" premieres in Japan.
- 2017 — First Strike #5, G.I. Joe #9, and Optimus Prime #11 are released by IDW Publishing.
- 2017 — The two-part series finale of Rescue Bots, "Upgrades" and "Transformations", premieres in Italy.
- 2019 — Robert Forster (voice of Bryce) passes away at age 78 from brain cancer.
- 2019 — The Cyberverse episode "Parley" premieres on the Cartoon Network app.
- 2022 — The Art and Making of Transformers: War for Cybertron Trilogy artbook is released by Viz Media.
- 2022 — The Transformers Roleplaying Game Core Rulebook hardcover is released by Renegade Game Studios.
- 2024 — The Transformers: Galactic Trials game is released on multiple platforms.
- 2024 — Transformers One is theatrically released in the UK, Ireland, Malta and Norway.
- 2025 — The Cyberworld episode "Game-a-Tron" premieres on YouTube.
- 2025 — The Transformers & G.I. Joe: A New Era for The Energon Universe panel takes place at NYCC.
- 2025 — Preorders for the Studio Series 86 Windcharger and Thundercracker go up.
- 1939 — Peter Musäus (German voice of Alcazar, Gort, Mark Morgan, Primacron and more) is born.
- 1950 — Joëlle Fossier (European French voice of Chromia, Firestar and Astoria Carlton-Ritz) is born.
- 1954 — Felipe di Nardo (Brazilian voice of Megatron and Rhinox) is born.
- 1955 — Alessandro Rossi (Italian voice of Optimus Prime) is born.
- 1965 — British writer Dan Abnett is born.
- 1975 — Actor Jason Jansen (Tommy Kennedy in The Transformers) is born.
- 1979 — Actress Katherine Sigismund is born.
- 1988 — Priscilla Tramontano, IDW colorist, is born.
- 1988 — João Cappelli (Brazilian voice of Rad White, Memo and War for Cybertron Trilogy Cheetor) is born.
- 1994 — DreamWorks, the company which released the 2007 Transformers movie, is founded.
- 2004 — Transformers: Energon Volume 1 and Volume 2 are released on DVD in the US by Paramount Pictures.
- 2005 — The Cybertron cartoon episode "Champion" premieres in the US.
- 2007 — New Avengers/Transformers #3 is released by Marvel Comics and IDW Publishing.
- 2008 — The Animated episodes "Transform and Roll Out Part 3" and "Home Is Where the Spark Is" premieres in Poland.
- 2008 — The Animated episode "Velocity" premieres in France.
- 2009 — Comics letterer Joe Rosen dies.
- 2011 — The Transformers Classics UK Volume 1 is released by IDW Publishing.
- 2012 — The Transformers: Prime episode "Inside Job" premieres on The Hub.
- 2012 — "King of the Road" is first published by Eaglemoss/GE Fabbri in Russia.
- 2014 — The How to Ride a Dinobot! one-shot comic is released from Hasbro's website.
- 2016 — The IDW Collection Phase Two: Volume 4 and Revolution #3 are released by IDW Publishing.
- 2018 — The Cyberverse episode "Cube" airs on the Cartoon Network app and website.
- 2019 — The Cyberverse episodes "Trials" and "Dark Birth" premiere in Japan.
- 2019 — The Cyberverse episode "Dark Birth" premieres in Germany and the U.S...
- 2021 — Transformers: The Manga Volume 3 is released by Viz Media.
- 2021 — Hasbro CEO Brian Goldner dies at age 58 from cancer.
- 2024 — The Transformers: EarthSpark episode "Control Alt Delete" premieres on Nickelodeon in the United States.
- 1923 — Henry Orenstein, the Hasbro employee who convinced the company to sell transforming Japanese robot toys, and who later invented the rubsign, is born.
- 1931 — Franz Rudnick (German voice actor during Generation 1) is born.
- 1932 — Ken Shiroyama (Japanese voice of Fight! Super Robot Lifeform Transformers 2010 cartoon Bombshell, Fireflight, Perceptor, and many more) is born.
- 1950 — Tsutomu Isobe (Japanese voice of Age of Extinction Lockdown) is born.
- 1951 — Eduardo Tejedo (Mexican voice of Daytrader and War for Cybertron Trilogy Shockwave) is born.
- 1959 — Dan DiDio, former Mainframe Entertainment executive, is born.
- 1962 — Martial Le Minoux (French voice of various characters including Air Raid in the War for Cybertron game and another Air Raid in the Dark of the Moon game) is born.
- 1964 — Masaya Onosaka (Japanese voice of Obsidian) is born.
- 1974 — Sébastien Reding (Canadian French voice director of Transformers One) is born.
- 1979 — Stefan Günther (German voice of Rad White) is born.
- 1980 — Mami Fukai (voice of Miki) is born.
- 1980 — Artist Alex Milne is born.
- 1982 — Luo Yuting (Chinese voice of Raf Esquivel) is born.
- 1984 — The Transformers episode "Roll for It" premieres in the U.S.
- 1986 — The Transformers episode "Madman's Paradise" premieres in the U.S.
- 1990 — Tomasz Włosok (Polish voice of Noah Díaz) is born.
- 1991 — The Victory episode "The Power of Rage" premieres in Malaysia.
- 1993 — Kaito Ishikawa (voice of Q-Transformers Shockwave) is born.
- 1999 — The Beast Wars Metals episode "Enter the New Warriors! Snippity Snip, Sir!" airs in Japan.
- 2001 — The 2001 Robots in Disguise cartoon episode "Ultra Magnus: Forced Fusion!" premieres in the U.S.
- 2004 — G.I. Joe vs. the Transformers II #2 is released in the U.S. by Devil's Due Press.
- 2004 — Transformers: Energon #28 is released by Dreamwave Productions.
- 2005 — The Cybertron episode "Ice" premieres in the U.S.
- 2005 — Franz Rudnick passes away on his 74th birthday.
- 2007 — The Transformers live-action movie is released on IMAX in The Netherlands.
- 2008 — Transformers Animated — Volume Eins: Drachenkämpfer is released on DVD in Germany by Paramount Pictures.
- 2009 — The Animated episode "Transwarped Part 2" premieres in Latin America.
- 2010 — The Transformers #12, the Transformers: Prime graphic novel, and Bots of Science are released by IDW Publishing.
- 2011 — The first day of New York Comic Con 2011. Hasbro attends and sells the exclusive Prime "Bumblebee and Arcee, Includes Raf Esquivel and Jack Darby" multi-pack.
- 2012 — The Super Robot Lifeform Transformers Prime episode "Hopeful Transformation! Aim for Planet Cybertron" premieres in Japan.
- 2014 — Hub Network re-launches as Discovery Family, on which Hasbro programming only airs in the daytime.
- 2014 — Transformers Prime — Season 2 Vol. 2: Nemesis Prime and Transformers Prime — Season 2 Vol. 2: Nemesis Prime - Limited Edition are released to home media in the United Kingdom by Primal Screen.
- 2015 — Towa Pictures who distributes the Live-action film series in Japan starting with The Last Knight is founded.
- 2018 — The first day of the "Buzz Weekend" Bumblebee promotional event at Universal CityWalk in Los Angeles CA.
- 2018 — The Cyberverse episode "Cube" airs on Cartoon Network.
- 2018 — Transformers: Cyberverse episode "Fractured" premieres in Italy.
- 2019 — The Cyberverse episodes "Escape From Earth" and "Party Down"
- 2021 — Tread & Circuits #1 and King Grimlock #3 are released by IDW Publishing.
- 2023 — The "Fortnite Transformers Pack!" is released at retail.
- 2023 — Transformers: EarthSpark - Expedition is released for consoles and PC.
- 2024 — The French premiere of Transformers One in Paris, nine days before the release of the film in French theaters.
- 2024 — The Transformers: EarthSpark episode "Aftermath" premieres on YTV in Canada.
- 1929 — Antônio Patiño (Brazilian voice of Jazz, Cyclonus, Autobot X and more) is born.
- 1952 — Katsuyoshi Toya (Japanese voice of Buzz Aldrin) is born.
- 1963 — Lori Petty (voice of Nightra) is born.
- 1964 — David Kaye (voice of Beast Wars Megatron, Unicron Trilogy Megatron, Animated Optimus Prime, Lugnut, Grimlock, Hardshell, Slashmark, and more) is born, yesssssss...
- 1969 — Kōsuke Okano (Japanese voice of Armada Hot Shot and Animated Headmaster and Hot Shot) is born.
- 1971 — Alessandro Ballico (Italian voice of Shockwave and Soundwave) is born.
- 1973 — Yukie Maeda (Japanese voice of Carlos and Sureshock in Armada and Alpha Q in Energon) is born.
- 1977 — Storyboard artist Will Ruzicka is born.
- 1983 — Bruno Tarta (Brazilian voice of Jawbreaker) is born.
- 1985 — The Transformers episode "Megatron's Master Plan, Part 1" premieres in the US.
- 1986 — The Transformers episode "Carnage in C-Minor" premieres in the US.
- 1989 — Tabata Portella (Brazilian voice of Frenzy) is born.
- 1996 — The Beast Wars episode "Gorilla Warfare" premieres in the US.
- 1998 — The Beast Wars II episode "The Artificial Planet Nemesis" premieres in Japan.
- 1998 — Beast Wars premieres in South Korea on MBC.
- 2003 — The Original Transformers — Season 3 Part 1: Volumes 1–3 are released on DVD in the US by Kid Rhino both individually and as a box set.
- 2004 — Takara releases Super Link SD-21 Bruticus, the final regular-retail release of the line.
- 2005 — The Cybertron episode "Honor" premieres in the US.
- 2009 — All Hail Megatron #16 is released by IDW Publishing.
- 2011 — The Transformers: Prime episode Darkness Rising, Part 4 premieres in Germany.
- 2011 — Transformers: Dark of the Moon is released in Venezuela.
- 2013 — The Transformers: Prime episode "Project Predacon" premieres in Spain.
- 2013 — The Transformers: Prime episode "Persuasion" premieres in Germany.
- 2015 — Transformers Prime — Season Two Blu-ray collection is released to home media by Madman Entertainment in Australia and New Zealand.
- 2017 — The Robots in Disguise episode "Something He Ate" premieres on Cartoon Network.
- 2018 — The second and final day of the "Buzz Weekend" Bumblebee promotional event at Universal CityWalk in Los Angeles CA.
- 2018 — The Cyberverse episodes "Shadowstriker" and "Maccadam's" air on Teletoon in Canada.
- 2018 — The Cyberverse episodes "Allspark" and "The Journey" airs in France.
- 2019 — The Cyberverse episodes "Sea of Tranquility", "The Visitor" and "Bring Me The Spark Of Optimus Prime" premieres in Brazil.
- 2021 — The Transformers: Cyberverse episodes "Enemy Line" to "The Other One" premieres in Brazil.
- 2022 — The Transformers: Forged to Fight mobile game announces it will be shutting down on January 13, 2023.
- 2023 — A Skybound Energon Universe panel held at NYCC 2023.
- 2023 —The Transformers: EarthSpark episode "The Last Hope, Part 2" premieres in France.
- 1923 — Inker Vince Colletta is born.
- 1927 — Olympia Stadium is opened in Detroit, Michigan.
- 1944 — Producer/musician Haim Saban is born.
- 1955 — Michael Lucke (German voice of Megatron) is born.
- 1956 — Patrick Donnay (French voice of Obsidian) is born.
- 1959 — Masako Katsuki (Japanese voice of Generation One Arcee, Chromia and Revenge of the Fallen Arcee) is born on the planet Neptune.
- 1976 — Rodrigo Lombardi (Brazilian voice of Canopy) is born
- 1981 — The first issue of Comic BomBom hits newsstands in Japan.
- 1983 — Introduction of the Lockheed F-117 Nighthawk (alt mode of Predator Falcon, Shadow Jet, Skyjack, G1 Air Raid, and others).
- 1985 — The Transformers episode "Megatron's Master Plan, Part 2" premieres in the US.
- 1986 — The Transformers episode "Fight or Flee" premieres in the US.
- 1987 — The Headmasters episode "Explosion on Mars!! MegaZarak Appears" premieres in Japan.
- 1987 — Arthur Pestel (French voice of Blitzwave in Transformers: EarthSpark) is born.
- 1988 — Transformers #188 - "Firebug!" is released in the UK by Marvel Comics.
- 1996 — The Beast Wars episode "The Probe" premieres in the US.
- 1997 — The Beast Wars episode "Cheetus's Crisis" premieres in Japan.
- 2003 — Transformers/G.I. Joe issue 2 is released in the US by Dreamwave Productions.
- 2004 — The auction for ~MAYUKO IWASA Edition~ Meister that began on October 8th successfully ends on Yahoo!Japan Auctions.
- 2005 — The Galaxy Force episode "Enter Master Galvatron" premieres in Japan.
- 2007 — The 2001 Robots in Disguise cartoon DVD box sets are re-released in the UK by Maximum Entertainment.
- 2008 — The Henkei! Henkei! Transformers manga chapter "Enter! The Transformers" is serialized in Japan in Comic BunBun's November 2008 issue.
- 2008 — The Animated episode "Rise of the Constructicons" premieres in France.
- 2009 — Transformers Animated — Volume Fünf: Der Doppelte Starscream is released on DVD in Germany by Paramount Pictures.
- 2011 — The Transformers: Prime episode "One Shall Rise, Part 3" premieres on The Hub.
- 2011 — The Transformers: Prime episode "Con Job" premieres in Italy.
- 2012 — The Transformers Prime episode "Loose Cannons" premieres in Italy.
- 2013 — The Transformers: Prime episode "Chain of Command" premieres in Spain.
- 2013 — The Transformers: Prime episode "Synthesis" premieres in Germany.
- 2014 — The Angry Birds Transformers game by Rovio is released for Apple iOS 7+ devices.
- 2015 — Transformers Prime: Beast Hunters — Stagione 3 Vol. 2: Corsa per la salvezza and Transformers Prime: Beast Hunters — Predacons Rising are released to home media in Italy by Primal Screen.
- 2015 — The third BotCon 2016 box set exclusive General Ramhorn is revealed.
- 2016 — The Rescue Bots episode "Family Business" premieres on Discovery Family.
- 2016 — The Robots in Disguise episode "Worthy" premieres on Teletoon in Canada.
- 2017 — The Rescue Bots episode "The Need for Speed" premieres in Italy.
- 2018 — Vicente Gisbert (Castilian Spanish voice of Rhinox) dies.
- 2023 — The Transformers: EarthSpark episode "Tojo Megatron!" premieres in Japan.
- 2023 — The The Toys That Built America episode "Transforming Toy Invasion" (which focuses on the competition between Transformers and Go-Bots) premieres on the History Channel.
- 2023 — Transformers Go! Go! #30 is published.
- 2024 — Transformers: Earthspark Season 3 Soundtrack is officially released.
- 2024 — Transformers Go! Go! #43 is published.
- 2025 — G.I. Joe #12 is released by Image Comics and Skybound Entertainment.
- ???? — Hinako Takahashi (Japanese voice of Airazor in War for Cybertron Trilogy) is born.
- 1926 — Artist Joe Sinnott is born.
- 1953 — Uwe Büschken (German voice of Simacore, Octopunch and Chief of Staff) is born.
- 1962 — Flea (voice of Aftermath) is born.
- 1967 — Luiz Laffey (Brazilian voice Shockwave, Ezra Greene, Cliffjumper and Predaking) is born.
- 1973 — Chae-heon Im (Korean voice of William Lennox, Ratchet, Lugnut, Ultra Magnus and Swindle) is born.
- 1980 — Ozan Ünal (German voice of Leo Spitz) is born.
- 1981 — Vagner Fagundes (Brazilian voice of Rodimus Prime, Smokescreen, Evan, Myles and Bisk) is born.
- 1985 — The Transformers episode "Auto Berserk" premieres in the U.S.
- 1986 — Ahn Hyo-min (Korean voice of Ultra Magnus, Boulder, H.B. Luskey and Saberhorn) is born.
- 1987 — The Headmasters episode "Explosion on Mars!! MegaZarak Appears" premieres in Japan.
- 1992 — Hinata Tadokoro (Japanese voice of Barricade in War for Cybertron Trilogy and voice of Megatron) is born.
- 1999 — The Beast Machines episode "Forbidden Fruit" premieres in the U.S.
- 2002 — Armada #3 is released by Dreamwave Productions.
- 2007 — Transformers is released on DVD in the U.S. The Beginnings "animated" motion comic prequel is included with special versions sold at Walmart.
- 2007 — Transformers: Movie Prequel Special Chapter 1 is released in the U.S. by IDW Publishing.
- 2009 — The Japanese Lawson's exclusive Revenge of the Fallen preview Bumblebee/Legends Class Mudflap and preview Soundwave/Legends Class Fallen 2-packs ship.
- 2010 — The Animated episode "Megatron's Raid" premieres in Japan.
- 2012 — The Prime episode "Crossfire" premieres in Italy.
- 2013 — More than Meets the Eye #22 and Beast Hunters Volume 1 TPB are released by IDW Publishing.
- 2013 — The Prime episode "Deadlock" premieres in Germany.
- 2013 — The Prime episode "Plus One" premieres in Spain.
- 2014 — Cloud: Spacetime World: Guardians of Time Chapter 4: Part 4 is first released.
- 2014 — Mariusz Leszczyński (Polish voice of Rodimus and Vector Prime) dies at age 71.
- 2015 — Prime: Beast Hunters — Predacons Rising is released to home video in Germany by Primal Screen.
- 2019 — The Cyberverse episode "Trials" premieres in Brazil.
- 2019 — Transformers #13 is released by IDW Publishing.
- 2019 — Transformers: The Definitive G1 Collection Volume 34: Autocracy is released by Hachette Partworks.
- 2020 — Hasbro hosts a Fan First Friday online event on YouTube.
- 2023 — Threezero officially reveals the DLX Bumblebee Ultra Magnus.
- 2024 — Destro #5 is released by Image Comics and Skybound Entertainment.
- 2024 — Preorders go up for a Earthrise Scorponok reissue.
- 1957 — Staffan Lindberg (Swedish voice of Scavenger) is born.
- 1958 — Actor John Nielsen (L. W. Wilder in Revenge of the Fallen) is born.
- 1960 — Sven Brieger (German voice of Nitro Zeus, General Whalen, Maccadam, Scrapface, Sergeant Scrubforce and Zeta Prime) is born.
- 1962 — Kensō Katō (Japanese voice of Waspeeter, Thrust, Waspinator, Insecticons and Swindle) is born, bun.
- 1965 — Carlos Carvajal (Chilean voice of Optimus Prime) is born.
- 1967 — Venus Terzo (voice of Beast Wars Blackarachnia) is born.
- 1967 — Alexandre Gillet (French voice of Starscream, Smokescreen and Billy in Transformers: Armada) is born.
- 1973 — Rick Wasserman (voice of Air Raid) is born.
- 1973 — Marcelo Piriggo (Brazilian voice of War for Cybertron Trilogy Rhinox) is born.
- 1974 — Actor Rizwan Manji (Akram in Transformers) is born.
- 1976 — Moon Nam-sook (Korean voice of Bud Hansen, Lucy Suzuki, Thunderblast, Clocker and Charlie Watson) is born.
- 1981 — Actor Liam Garrigan (King Arthur in The Last Knight) is born.
- 1982 — Paweł Ciołkosz (Polish voice of Jazz, Larry LaRue and Mohawk) is born.
- 1985 — The Transformers episode "City of Steel" premieres in the US.
- 1986 — Mark Whitten (voice of War For Cybertron Trilogy Sideswipe and Skywarp) is born.
- 19?? — Geneviève Doang (European French voice of Su Yueming) is born.
- 1989 — The Victory episode "The Tide Is Turned! The Ultimate Weapon, the Victory Unification" premieres in Japan.
- 1989 — Maria Hönig (German voice of Hank) is born.
- 1990 — Pedro Azevedo (Brazilian voice of Prowl in Transformers: War for Cybertron Trilogy) is born.
- 1997 — Canadian channel Teletoon begins its first broadcast.
- 2003 — The Legends of the Microns episode "奇跡 (ふっかつ) - miracle" premieres in Japan.
- 2003 — The Armada episode "Remorse" premieres in the US.
- 2005 — The Cybertron episode "Primal" premieres in the US.
- 2006 — The 29th show in the Kiss Players radio drama series airs in Japan on the "Transformers Kiss Play: Transformers News Center" program.
- 2007 — Beast Wars: The Ascending #2 and Transformers: Magazine #3 are released by IDW Publishing.
- 2008 — Big Lots stores recall the bootleg Legends "Super Transform Ultimate End General Mobilization" toys due to legal pressure from Hasbro.
- 2009 — NASCAR racers Jeff Gordon and Ryan Newman drive special Revenge of the Fallen-themed cars at the NASCAR Sprint Cup NASCAR Banking 500 in Charlotte, North Carolina. Gordon finishes fourth, while Newman finishes in eleventh. In addition, race coverage on ABC/ESPN is presented by Revenge of the Fallen on DVD! Buy it!
- 2011 — The Transformers: Prime episode "Shadowzone" premieres in South Korea.
- 2012 — The Transformers: More than Meets the Eye Volume 2 TPB and The Transformers: The IDW Collection Volume Seven HC are released by IDW Publishing.
- 2012 — The Transformers: Prime episode "Nemesis Prime" premieres in Italy.
- 2013 — The Transformers: Prime episode "Thirst" premieres in Spain.
- 2018 — Optimus Prime #24 is released by IDW Publishing.
- 2024 — Walmart Collector Con Fall 2024 launches and officially reveals the Transformers x Star Wars Collaborative The Mandalorian N-1 Starfighter and other Walmart exclusives item go up for preorder.
- 2025 — TakaraTomy officially reveals the Transformers Overgear OG-01 Ironhide, and OG-02 Blackout, MPMN ROTF Sideswipe and Missing Link C-11 Delta Magnus at the Japan Model Hobby Show.
- ???? — Lucas Marcondes (Brazilian voice of Jetfire) is born.
- 1919 — Orlando Drummond (Brazilian voice of Blurr, Unicron, Buzz Aldrin and many more) is born.
- 1944 — Ulf-Jürgen Wagner (German voice of Generation 2 Bumblebee, Kickback and more) is born.
- 1945 — Norio Wakamoto (voice of Galaxy Force Flame Convoy and Japanese dub of Animated Megatron) is born of Ultimate Perfection.
- 1950 — Natale Ciravolo (Italian voice of Micronus Prime) is born.
- 1952 — Michael Pan (German voice of Skids, Clampdown and Dr. Powell) is born.
- 1954 — Yūji Mitsuya (Voice director of Beast Wars Neo and Transformers: Car Robots) is born.
- 1957 — Elisabetta Cesone (Italian voice of Mega) is born.
- 1959 — Marvel letterer Jim Massara is born.
- 1961 — Rosario Zamora (Chilean voice of Blackarachnia) is born.
- 1963 — Saverio Indrio (Italian voice of Heavy Load, Bumblebee, Doubledealer and Mandroid) is born.
- 1965 — Frank Schaff (German voice of Graham and Donnie) is born.
- 1969 — Ed Lewis (voice director for Season 4 of Cyberverse) is born....IN AMERICA!
- 1985 — The Fight! Super Robot Lifeform Transformer episode "Immobilizer" premieres in Japan.
- 1988 — The Super-God Masterforce episode "Will the Bomber Project Be Destroyed!?" premieres in Japan.
- 1989 — Riisa Naka (Japanese voice of Elena Wallace) is born.
- 1992 — The Headmasters episode "Mars Explodes! Watch Out, Fortress Maximus!" airs in Malaysia.
- 2000 — The Car Robots episode "Arise! Cybertron City" premieres in Japan.
- 2000 — Transformers: Car Robots — Vol. 3 and Vol. 4 are released on DVD in Japan by Pony Canyon.
- 2002 — The Armada episode "Palace" premieres in the US.
- 2003 — Takara releases Legend of the Microns MM-21 Emergency Micron Exdimensions, the final normal-retail release of the line.
- 2003 — The Armada episode "Jungle" premieres in France.
- 2005 — The Cybertron episode "Trust" premieres in the US.
- 2006 — "Spotlight: Nightbeat" and Stormbringer #4 are released by IDW Publishing.
- 2008 — The Transformers Animated episode "Rise of the Constructicons" premieres in Latin America.
- 2008 — The Animated episodes "Total Meltdown" premieres in Poland.
- 2008 — The Animated episode "A Fistful of Energon" premieres in France.
- 2011 — The Transformers: Prime episode "Operation: Breakdown" premieres in South Korea.
- 2012 — The Prime episode "Grill" premieres in Italy.
- 2013 — The Transformers: Prime episode "Prey" premieres in Brazil.
- 2013 — The Transformers: Prime episode "Project Predacon" premieres in Germany.
- 2013 — "Car Crash" is first published by Eaglemoss/GE Fabbri in Russia.
- 2017 — Optimus Prime: First Strike, ROM: First Strike, Rom vs. Transformers: Shining Armor #4, Lost Light #10, and The IDW Collection Phase Two: Volume 6 are released by IDW Publishing.
- 2017 — Transformers: The Definitive G1 Collection: Volume 7: The Harder They Die is released by Hachette Partworks.
- 2019 — The Cyberverse episode "Starscream's Children" premieres on the Cartoon Network app.
- 2022 — Japanese Mobile Game Transformers Rage Battle for the G123 platform is revealed and pre-registration begins.
- 2023 — The Transformers: Reactivate Bumblebee and Starscream two pack is accidentally revealed by Toys"R"Us.ca a month ahead of their official reveal and preorder date.
- 2024 — The Transformers Multi Shock video game is revealed by TakaraTomy.
- 2024 — Hasbro hosts a product reveal panel at NYCC officially revealing several Studio Series figures.
- 2025 — The Cyberworld episode "Oh Scrap!" premieres on YouTube.
- 1931 — Marvel Comics letterer Tom Frame is born.
- 1962 — Tatsunoko Production is founded.
- 1963 — Musician Paul Gordon is born.
- 1964 — Silvio Pandolfi (Italian voice of Quickmix, Breakaway, Predaking, Underbite, Blastwave and Motormaster) is born.
- 1965 — Su-jin Gang (Korean voice of Bumblebee) is born.
- 1969 — Vanessa Marshall (Additional voices in EarthSpark) is born.
- 1974 — Hyeon-kyeong Jeong (Korean voice of Arcee) is born.
- 1975 — Daniel del Roble (Mexican voice of Wheeljack, Buzzstrike, King Arthur, Ron and Deseeus's Death Face) is born.
- 1977 — Film director Jason Reitman is born.
- 1979 — Ricardo Méndez (Mexican voice of Wheeljack) is born.
- 1983 — Transformers fan and media personality Thew Adams is born.
- 1989 — Arturo Cataño (Mexican voice of Breakdown, Vehicons, Kade Burns and Eye-Goon) is born.
- 1993 — Andrés Navy (Mexican voice of Wheeljack in Rise of the Beasts) is born.
- 2001 — The Robots in Disguise (2001) episode "Power to Burn!" premieres in the U.S.
- 2003 — Transformers: The Battle of the Star Gate issue #4 is first published in Super Robot Magazine #14.
- 2005 — The Cybertron cartoon episode "Trap" premieres in the U.S.
- 2005 — Infiltration #0 is published in the U.S., kicking off IDW Publishing's brand-new Transformers universe.
- 2008 — The Animated episode "Autoboot Camp" premieres in France.
- 2010 — Preorders open up for the Japanese 7-11 exclusive Buzz Lightyear Spaceship Gentei Version toy.
- 2010 — Last day to use the activation card for the The Optimus Experience.
- 2011 — The Transformers #28 is released by IDW Publishing.
- 2012 — The Transformers: Prime episode "Patch" premieres on The Hub.
- 2012 — The Transformers: Prime episode "Armada" premieres in Italy.
- 2012 — The Transformers: Prime episode "Orion Pax, Part 1" premieres in Germany.
- 2018 — The Cyberverse episode "Terminal Velocity" airs on the Cartoon Network app and website.
- 2018 — Transformers: Cyberverse episodes "Fractured" and Memory premieres in Portugal.
- 2019 — The Rescue Bots Academy episodes "All that Glitters" and "Dig Fest" premiere on Discovery Family.
- 2019 — The Cyberverse episode "Parley" premieres on Cartoon Network in the U.S. and also Germany.
- 2019 — The Cyberverse episodes "Wiped Out" and "Ghost Town" premiere in Australia and New Zealand.
- 2021 — Jack Angel (voice of the original The Transformers cartoon Astrotrain, Omega Supreme, Ultra Magnus (not in the movie) and many others) passes away at age 90.
- 2022 — Transformers: Best of Grimlock is released by IDW Publishing.
- 2024 — Symbiote Studios Transformers: Dinobots Sludge and Grimlock Version 3 are revealed on Daniel Arseneault's Transformers Slag Livestream.
- 2024 — The Transformers: EarthSpark episode "The Butterfly Effect" premieres on Nickelodeon in the United States.
- 19?? — Kazuhiko Nishimatsu (voice of Halfshell and God Neptune) is born.
- 1948 — Jeff MacKay (voice of the original The Transformers cartoon Fireflight) is born.
- 1956 — Shinpachi Tsuji (Japanese voice of Que/Wheeljack from Dark of the Moon) is born.
- 1959 — Luis Lugo (Latin-American Spanish voice of Smokescreen and Scorponok) is born.
- 1962 — Marvel US writer Len Kaminski is born.
- 1962 — Illustrator Ron Garney is born.
- 1971 — Kōichi Tōchika (Japanese voice of Tigatron and Tigerhawk) is born.
- 1975 — Mabel Cezar (Brazilian voice of Sarah Lennox) is born.
- 1976 — Dreamwave colorist Sigmund Torre is born.
- 19?? — Comic artist Guido Guidi is born.
- 1984 — The Transformers episode "Divide and Conquer" premieres in the US.
- 1986 — The Transformers episode "Webworld" premieres in the US.
- 1991 — The Victory episode "Battle in the Antarctic" premieres in Malaysia.
- 1999 — The Beast Wars Metals episode "Revive, Convoy" airs in Japan.
- 2001 — The Robots in Disguise episode "The Two Faces of Ultra Magnus" premieres in the US.
- 2004 — War Within: The Age of Wrath #2 is released in the US by Dreamwave Productions.
- 2004 — The Transformers — Collection 4: Series 3.1 is released on DVD in Australia by Madman Entertainment.
- 2004 — Super Link — Volume 006 is released on DVD in Japan by Interchannel.
- 2005 — The Cybertron episode "Invasion" premieres in the US.
- 2008 — Transformers Animated — Volume One: Blast from the Past is released on DVD in the UK by Paramount Pictures.
- 2009 — Revenge of the Fallen is released on DVD and Blu-ray disc in the US by Paramount Pictures. According to unconfirmed reports, it sells four million copies in its first day. Four. Million.
- 2009 — The Transformers - 25th Anniversary Matrix of Leadership Edition: Collector's Set is released on DVD in the US by Shout! Factory.
- 2009 — The Animated episode "Transwarped Part 3" premieres in Latin America.
- 2010 — The Transformers: Drift #4 is released by IDW Publishing.
- 2011 — Final day to send in your receipts for the "Prime Style" campaign.
- 2012 — TakaraTomy releases United EX Grimmaster, Racemaster and the Dozermaster vs Airmaster set.
- 2012 — The Super Robot Lifeform Transformers: Prime episode "Activated Transformation! The Key to Vector Sigma" premieres in Japan.
- 2013 — The first day to enter the Edion and Bic Camera stores' "Arcee ~Blue Plated Ver~" contest.
- 2015 — "Transformers: Robots in Disguise — A New Autobot Mission" is released on home media by Shout! Factory.
- 2017 — The Rescue Bots episode "Countdown" premieres in Italy, being the last episode to air in Italy even after the series finale.
- 2018 — The Cyberverse episode "Terminal Velocity" airs on Cartoon Network.
- 2018 — The Cyberverse episodes "Allspark" and "The Journey" airs in Italy.
- 2019 — The Cyberverse episode "Ghost Town" premieres in France.
- 2021— IGN publishes an article revealing the Legacy toyline including the deluxe Autobot Skids and the voyager Prime Universe Bulkhead figures.
- 2022— Hasbro has a Transformers Brand Team Fan Roundtable Q&A session with notable Transformers fans.
- 2024 — The Transformers: EarthSpark episode "In Ruins" premieres on YTV in Canada.
- 2025 — Preorders for the Transformers Deluxe Edition Book Two and Void Rivals Deluxe Edition Book Two go up.
- 1929 — Ulrich Bernsdorff (German voice of Generation 1 Kup and countless others) is born.
- 19?? — Comic artist Tom Morgan is born.
- 1937 — Ednaldo Lucena (Brazilian voice of Crosswise) is born.
- 1955 — Yukimasa Kishino (voice of Abominus, Black Zarak, Bruticus and Predaking in Zone and Japanese voice of Ram Horn) is born.
- 1959 — Ken Watanabe (voice of Drift in Age of Extinction) is born.
- 1962 — Miki Itō (voice of Papika) is born.
- 1963 — Tanguy Goasdoué (European French voice of Dutch) is born.
- 1977 — Comic artist Diego Jourdan is born.
- 1977 — Éléonore Meeùs (French voice of Slipstream in the Cyberverse cartoon) is born.
- 1985 — The Transformers episode "Desertion of the Dinobots, Part 1" premieres in the US.
- 1986 — The Transformers episode "Ghost in the Machine" premieres in the US.
- 1989 — The Transformers: The Movie finally is released in Japan on VHS.
- 1990 — The Super-God Masterforce episode "The Emergence of the Fourth Powermaster" premieres in Malaysia.
- 1997 — The Japanese Beast Wars OP single "WAR WAR! STOP IT" and ED single "FOR THE DREAM" are released by Columbia Music Entertainment.
- 1998 — The Beast Wars II episode "Gigastorm's Treachery" premieres in Japan.
- 2002 — The Transformers—Five Faces of Darkness and The Rebirth are released on DVD in the UK by Sony Wonder and Maverick Entertainment.
- 2005 — Galaxy Force—Vol. 05 is released on DVD in Japan by Victor Entertainment.
- 2005 — The Cybertron episode "Retreat" premieres in the US.
- 2006 — The third issue of the Kiss Players manga is published.
- 2008 — Transformers Animated: The Game is released in the US.
- 2009 — Tales of the Fallen #3 is released by IDW Publishing.
- 2011 — The Transformers: Prime episode Darkness Rising, Part 5 premieres in Germany.
- 2015 — The Transformers (vol.2) #46 and More than Meets the Eye Volume 8 TPB are released by IDW Publishing.
- 2018 — The Cyberverse episodes "Whiteout" and "Megatron Is My Hero" premiere in France.
- 2020 — Transformers: The Definitive G1 Collection: Volume 99: The Cracks Beneath Your Feet is released by Hachette.
- 2022 — Robosen announces new Auto Converting Optimus Prime Elite Edition with it being up for pre-order.
- 2023 — The "Fortnite Transformers Pack!" is digitally released.
- 2024 — BigBadToyStore annouces a reissue of Siege Omega Supreme for 2025.
- 1946 — TMS Entertainment is founded.
- 1948 — François Leccia (European French voice of Cyclonus, Sky Lynx, Octane, Red Alert and second voice of Spike Witwicky in the original cartoon) is born.
- 1967 — Artist Dheeraj Verma is born.
- 1971 — Milton Wolch (Mexican voice of Sideswipe in the "Cyber Missions" series and also Knock Out) is born.
- 1977 — Graciela Molina (Castilian Spanish voice of Mikaela Banes) is born.
- 1985 — The Transformers episode "Desertion of the Dinobots, Part 2" premieres in the US.
- 1997 — The Beast Wars episode "Operation: Time Bomb Transfer!" premieres in Japan.
- 1999 — Beast Wars Neo — ACT. 7 and ACT. 8 are released on VHS in Japan by Pioneer LDC.
- 2003 — G.I. Joe vs. the Transformers Issue 4 is released in the US by Devil's Due Press.
- 2004 — The Transformers: Trial By Fire HC is released by Titan Books.
- 2005 — The Galaxy Force episode "To the Underwold, GO!!" premieres in Japan.
- 2008 — All Hail Megatron #4 and Transformers Animated Volume 5 are released by IDW Publishing.
- 2008 — The Animated episode "Black Friday" premieres in France.
- 2009 — Katsutoshi Sasaki, director of many episodes of the The Headmasters, Super-God Masterforce and Victory cartoons, dies from lung cancer at the age of 65.
- 2011 — The Transformers: Prime episode "Convoy" premieres in Italy.
- 2011 — The Transformers: Prime episode "Con Job" premieres in Spain.
- 2012 — Transformers: Prime Season 1 — Darkness Rising is released on DVD in the UK by Universal.
- 2012 — The Transformers: Prime episode "Flying Mind" premieres in Italy.
- 2013 — The Transformers: Rescue Bots: "Griffin Rock Rescue" compilation DVD is released in the US by Shout! Studios.
- 2013 — The Transformers: Prime episode "Rebellion" premieres in Germany.
- 2014 — Primacy #3 and Robots in Disguise #34 are released by IDW Publishing.
- 2015 — "Stuck in a Tree" and "Kre-O Cars" are uploaded to the Transformers YouTube page.
- 2015 — The fourth BotCon 2016 box set exclusive General Cicadacon is revealed.
- 2016 — The two-part series finale of Rescue Bots, "Upgrades" and "Transformations", premieres on Discovery Family.
- 2016 — The Robots in Disguise episode "History Lessons" premieres on Cartoon Network in the US.
- 2017 — The Robots in Disguise episode "Sick as a Bot" premieres on Cartoon Network.
- 2019 — The Cyberverse episode "Dark Birth" premieres in Brazil.
- 2021 — The first day of the Hasbro Pulse Con 2021 virtual convention on YouTube, The Legacy toyline is officially revealed and pre-orders go up for wave 1.
- 2023 — The Transformers: EarthSpark episode "Secret Story" premieres in Japan.
- 2024 — Transformers One is released on digital.
- 2024 — Preorders go up for the Studio Series Double Punch, Decepticon Hatchet, Gamer Edition Skywarp and SS86 Galvatron
- 2025 — An animated adaptation of the Skybound Entertainment Energon Universe is annouced with Joe Henderson as show runner.
- 19?? — John Steven Rocha (voice of Springload) is born to be an outlaw.
- 1926 — Stan Jones (voice of the original The Transformers cartoon Scourge, Zarak and others) is born.
- 1927 — Mizuho Suzuki (voice of Unicron in the Japanese dub of The Transformers: The Movie) is born.
- 1959 — Musician "Weird Al" Yankovic (voice of Animated Wreck-Gar and also Cosmos) graces the universe by being born.
- 1961 — Bernhard Völger (German voice of Smokescreen, Blades and more) is born.
- 1963 — Mônica Rossi (Brazilian voice of Carly, Astoria Carlton-Ritz and Terratronus) is born.
- 1964 — David Sobolov (voice of Depth Charge, Brawl, Shockwave, Blitzwing, Battletrap, Apelinq and more) is born bald. Keezy Fem!
- 1968 — Comic artist Gary Erskine is born in Paisley, Scotland.
- 1973 — Actor Louis-Philippe Dandenault (Canadian French voice of Professor Colan and Crosshairs in the live-action film series) is born.
- 1977 — Executive producer Dana Vasquez-Eberhardt is born.
- 1980 — Myeong-jun Kim (Korean voice of B-127) is born.
- 1984 — Pauliina Virta (Finnish voice of Misha Miramond, Lucy Suzuki and Thunderblast) is born.
- 1985 — Comic artist Josh Burcham is born.
- 1985 — The Generation 1 episode "Blaster Blues" premieres in the U.S.
- 1987 — Lee Sae-byeok (Korean voice of Hank) is born.
- 1991 — Jinya Haruka (voice of Ignite Leo) is born.
- 1991 — Demétrios Augustus (Brazilian voice of Sky-Byte) is born.
- 1998 — Beast Wars II — ACT. 7 is released on VHS in Japan by Pioneer LDC.
- 2002 — Generation 1: Prime Directive #6 is released by Dreamwave Productions.
- 2002 — Transformers: The Comics is released in Japan by Million Publishing.
- 2003 — The Armada episode "Carnival" premieres in France.
- 2008 — Henkei! Henkei! volume 6 is first released.
- 2008 — TakaraTomy releases Henkei! Henkei! C-09 Lambor, C-10 Cybertron Streak and D-05 Destron Octone.
- 2008 — Titan releases the first issue of their Animated comic.
- 2009 — ESPN and NASCAR's "Transformers - Choose your side & win" sweepstakes ended at 11:59 PM.
- 2010 — The Animated episode "The Tough Dirt Boss" premieres in Japan.
- 2012 — The Prime episode "Orion Pax, Part 2" premieres in Germany.
- 2012 — The Prime episode "Tunnel Vision" premieres in Italy.
- 2013 — Regeneration One #95 and Last Stand of the Wreckers HC (Red Label Edition) are released by IDW Publishing.
- 2013 — Norma Echevarría (Mexican voice of Strika) dies at age 53 from multiple sclerosis.
- 2014 — Cloud: Spacetime World: Guardians of Time Chapter 4: Part 5 is first released.
- 2018 — The Cyberverse episode "Allspark" premieres in Portugal.
- 2020 — Battlegrounds is released for Nintendo Switch, PlayStation 4, Xbox One, and PC.
- 2020 — TakaraTomy releases War for Cybertron Trilogy WFC-03 Chromia and WFC-04 Sideswipe and Studio Series SS-57 Blitzwing, plus Earthrise ER EX-11 Blast Master & Fuzer and ER EX-12 Airwave are released as TakaraTomy Mall exclusives.
- 2021 — The second day of the Hasbro Pulse Con 2021 virtual convention on YouTube, no new Transformers content on this day though.
- 2024 — Transformers One is theatrically released in France.
- 2024 — Void Rivals #13 is released by Image Comics and Skybound Entertainment.
- 2025 — The Wild King episode "Resurrection! The Evil One" premieres on the TakaraTomy YouTube channel.
- 1930 — Jack Angel (voice of the original The Transformers cartoon Astrotrain, Omega Supreme, Ultra Magnus (not in the movie) and many others) is born.
- 1953 — Hiroshi Takemura (voice of Ginrai and Victory Leo) is born.
- 1953 — Celso de Vasconcelos (Brazilian voice of Líder Optimus) is born.
- 1963 — Li Yi (Chinese voice of Morshower, Alexi Voskhod and Richard Nixon) is born.
- 1966 — Niseem Onorato (Italian voice of William Lennox) is born.
- 1969 — Musician Mitsuhiro Oikawa is born.
- 1970 — Actor Corey Klemow (Theodore Stallworth in Transformers: The Ride – 3D) is born.
- 1973 — Composer Tetsuya Shibata is born.
- 1985 — The Transformers episode "A Decepticon Raider in King Arthur's Court" premieres in the US.
- 1985 — Patt Souza (Brazilian voice of Elena Wallace and Ulf the Orange) is born.
- 1986 — The Fight! Super Robot Lifeform Transformers episode "The Mystery of the Insectrons" premieres in Japan.
- 1986 — Nobuhiko Okamoto (voice of Soundwave in Q-Transformers) is born.
- 1986 — Shinnosuke Ogami (Japanese voice of Shockwave in Bumblebee and also Soundwave and Impactor in War for Cybertron Trilogy) is also born.
- 1988 — Miyuki Satō (Japanese voice of Hank) is born.
- 1997 — Don Messick (voice of Generation 1 Gears, Ratchet and Scavenger) dies of a stroke at age 71.
- 1998 — The Beast Wars episode "Optimal Situation" premieres in the US.
- 2003 — The Legends of the Microns episode "怪物 (にせもの) - puppet" premieres in Japan.
- 2003 — The Armada episode "Depart" premieres in the US.
- 2003 — The Armada episode "Palace" premieres in France.
- 2003 — The Transformers: City of Fear TPB is published by Titan Books.
- 2005 — The Cybertron episode "Revelation" premieres in the US.
- 2007 — Megatron Origin #4 and Devastation #3 are released by IDW Publishing.
- 2007 — Beast Machines — Season Two: Volume One and Volume Two are released on DVD in Australia by Sony.
- 2007 — The Bump of Chicken single "Mayday" is released by Toy's Factory.
- 2009 — Device Label Ravage and Tigatron are released in Japan.
- 2010 — Inker Mike Esposito dies at the age of 83.
- 2011 — Ken Yamaguchi (Japanese voice of the original The Transformers cartoon Blurr and many others) dies at the age of 55 due to Cardiac arrest.
- 2011 — The Transformers: Prime episode "Crisscross" premieres in South Korea.
- 2012 — The Transformers Prime episode "Orion Pax, Part 3" premieres in Germany.
- 2012 — The Transformers: Prime episode "Triangulation" premieres in Italy.
- 2015 — TakaraTomy releases Legends LG15 Nightbird Shadow, LG16 Slipstream and LG17 Blackarachnia and Adventure TAV29 Bumblebee Supreme Mode, TAV30 Battle Grimlock, TAV31 Black Shadow, TAV32 Rumble & Frenzy, TAVVS04 Sideswipe and Stepper, TED-13 Drift and TED-14 Fracture.
- 2017 — Transformers: All Spark is published by Hero-X.
- 2018 — Transformers: Bumblebee Movie Prequel: From Cybertron with Love TPB is released by IDW Publishing.
- 2018 — Transformers: Cyberverse episode "Fractured" premieres in Hungary online.
- 2019 — Producer Joe Bacal dies at the age of 85.
- 2020 — The Transformers: Cyberverse episode "The Sleeper" premieres in Germany.
- 2024 — Transformers One is released on Amazon Prime Video.
- 2025 — The Transformers Cyberworld panel takes place at MCM London Comic Con 2025.
- 1950 — Mark L. Taylor (voice of Bertram Luskey) is born.
- 1953 — Musician Takeshi Ike is born.
- 1964 — Kevin Michael Richardson (voice of Animated Omega Supreme, Revenge of the Fallen Rampage, Prime Bulkhead and more) is born.
- 1968 — Liang Zhenghui (Chinese voice of Spike Witwicky) is born.
- 1970 — Iwa K (Indonesian voice of Age of Extinction Hound) is born.
- 1971 — Masami Iwasaki (voice of Bighorn, Neo Hardhead, Build Cyclone, Wrecker Hook and Gaidora as well as Japanese voice of Dreadwing and Skyquake) is born.
- 1973 — Actor Martin Watier (Canadian French voice of Skids and Cade Yeager) is born.
- 1977 — Yasuhiro Miyata (voice of Killer Punch) is born.
- 1979 — Csaba Tokaji (Hungarian voice of Demolishor, Undermine and Heatwave) is born.
- 1979 — Colorist Kris Carter is born.
- 1985 — Actor John Robinson (Miles Lancaster in Transformers) is born.
- 1985 — Ayahi Takagaki (Japanese voice of Animated Arcee, Teletran-1 and Robby Malto) is born.
- 1985 — The Fight! Super Robot Lifeform episode "Atlantis, Arise!" premieres in Japan.
- 1988 — The Super-God Masterforce episode "God Ginrai - Into the Sky!!" premieres in Japan.
- 1992 — The Headmasters episode "Mars Explodes! The Scorpion Appears!" airs in Malaysia.
- 2000 — The Car Robots episode "JRX versus Baldigus" premieres in Japan.
- 2002 — The Armada episode "Confrontation" premieres in the US.
- 2002 — The Transformers: Dark Designs HC is released by Titan Books.
- 2003 — The Armada episode "Confrontation" premieres in France.
- 2004 — Transformers: Robots in Disguise—Part 1 of 2 is released on DVD in the UK by Maximum Entertainment.
- 2005 — The 15 Go! Go! chapter "Star Convoy Volume" is published in the December 2005 issue of Dengeki Hobby Magazine.
- 2006 — Transformers: The Animated Movie #1 is released in the US by IDW Publishing.
- 2006 — The 15 Go! Go! chapter "Kiss Players Position Volume" is published in the December 2006 issue of Dengeki Hobby.
- 2007 — TakaraTomy releases the Transformers: Beast Wars Telemocha Series TM-SP DX Convoy and TM-SP DX Megatron.
- 2008 — The Animated episode "A Fistful of Energon" premieres in Latin America.
- 2008 — The Transformers Animated episode "Total Meltdown" premieres in Italy.
- 2011 — The Transformers: Prime episode "Metal Attraction" premieres in South Korea.
- 2012 — The Transformers Prime episode "Operation Bumblebee, Part 1" premieres in Germany.
- 2013 — "Enlistment" begins for the closed-beta for Jagex's Transformers Universe MOBA game.
- 2013 — Piero Tiberi (Italian voice of Optimus Prime) dies at age 66.
- 2015 — The Robots in Disguise episode "The Champ" premieres in Japan.
- 2016 — The Transformers: Rescue Bots: "Bots' Battle for Justice" compilation DVD is released in the US by Shout! Studios.
- 2017 — First Strike #6, Hasbro Aw Yeah HC and Lost Light Vol. 1 TPB are released by IDW Publishing.
- 2022 — Paramount+ launches in The Netherlands and Portugal.
- 2023 — Void Rivals #5 is released by Image Comics and Skybound Entertainment.
- 2024 — EarthSpark's third season premieres on Paramount+ in the US and Canada.
- 2025 — TakaraTomy releases Age of the Primes AOTP-14 Decepticon Vortex, AOTP-15 Sky-Byte (RID 2001 Universe), Timelines Optimus Prime / Timelines Starscream, and Wild King WKEX-01 World Dragnus.
- 2025 — The Hasbro Transformers Toy panel takes place at MCM London Comic Con 2025.
- 2025 — The Cyberworld episode "Carousel Chaos" premieres on YouTube.
- 1941 — Wolfgang Ziffer (German voice of Egyptian guard) is born.
- 1944 — Headmasters lyricist Keisuke Yamakawa is born.
- 1950 — Dan Gilvezan (voice of the original The Transformers cartoon Bumblebee and many others) is born.
- 1960 — Juliette Degenne (French voice of Blackarachnia in War for Cybertron Trilogy) is born.
- 1961 — Yoshiyuki Kaneko (Japanese voice of Cogman and Bill O'Reilly) is born.
- 1961 — Tomoko Shiota (Japanese voice of D. Greene) is also born.
- 1962 — Marvel Comics letterer Jack Morelli is born.
- 1964 — Charles Parnell (CIA Director in Age of Extinction) is born.
- 1983 — Ilona Molnár (Hungarian voice of Dani Burns and Game Over) is born.
- 1997 — The Beast Wars episode "Aftermath" premieres in the US.
- 2001 — The Robots in Disguise (2001) episode "Hope for the Future" premieres in the US.
- 2006 — The Kiss Players "Hot Rodimus x Syaosyao" figure set is released in Japan.
- 2010 — Bots of Science is published in the US by IDW Publishing.
- 2010 — The Cool Episode 8 is serialized in Japan by Kerokero Ace in their December 2010 issue.
- 2012 — The Transformers: Prime episode "Regeneration" premieres on The Hub.
- 2012 — Transformers: All Spark Episode 2 "To Earth" is serialized in Japan by Kerokero Ace in their December 2012 issue.
- 2012 — Transformers Prime — Vol. 6 and Transformers Prime — Vol. 7 are released to home media in Japan by Avex Trax.
- 2012 — "Mount Problem!" is first published by Eaglemoss/GE Fabbri in Russia.
- 2013 — TakaraTomy releases Masterpiece MP-18 Bluestreak, TG-25 Orion Pax VS Megatronus and Go! G22 Hunter Arcee and G23 Guren Dragotron.
- 2013 — The Transformers: Prime episode "Evolution" premieres in Spain.
- 2016 — The Transformers: Revolution, Action Man: Revolution, and second printings of Revolution issues #1 and #2 are released by IDW Publishing.
- 2017 — Manfred Erdmann (German voice of Megatron and Galvatron) passes away at age 77.
- 2018 — The Cyberverse episode "Shadowstriker" airs on the Cartoon Network app and website.
- 2018 — The Cyberverse episodes "Sabotage" and "Teletraan-X" are released in the US on the Xfinity X1 service.
- 2019 — TakaraTomy releases Siege SG-33 Autobot Powertrain & Highjump, SG-34 Barricade and SG-35 Thundercracker.
- 2019 — The Cyberverse episode "Parley" premieres in Japan.
- 2019 — The Cyberverse episode "Starscream's Children" premieres in the U.S, Germany and Japan.
- 2019 — The Cyberverse episodes "Perfect Storm" premieres in France.
- 2019 — The Rescue Bots Academy episodes "Trick or Treat" and "Monster Savings" premiere on Discovery Family.
- 2019 — Bumblebee makes its premiere on the Brazilian tv channel Telecine.
- 2024 — TakaraTomy releases MPG MPG-08 Yamabuki, TL-74 Shard, TL-75 Autobot Gears, TL-76 Sandstorm, SS-130 Shockwave, SS-131 Sunstreaker, SS-132 Swoop and SS GE-07 Sideswipe.
- 2024 — Hasbro hosts a panel at MCM London officially revealing Studio Series Apelinq and SS-118 Bumblebee.
- 2024 — The Transformers: EarthSpark episode "Togetherness" premieres on Nickelodeon in the United States.
- 1942 — Mariusz Leszczyński (Polish voice of Rodimus and Vector Prime) is born.
- 1945 — Writer Carla Conway is born.
- 1955 — Actor Michael Shamus Wiles (Two Star General in Transformers) is born.
- 1957 — Ferenc Borbiczki (Hungarian voice of Overhaul/Leobreaker, Megatron, Megatronus, Paralon and more) is born.
- 1958 — Simon Le Bon, lead vocalist of Duran Duran is born.
- 1970 — Jorge Ornelas (Mexican voice of Quickstrike, Hightower, Ironhide, Landfill and Rail Racer) is born.
- 1970 — Maythe Guedes (Latin-American Spanish voice of Lucy Suzuki) is born.
- 1975 — Elias Toufexis (voice director of Fortnite) is born.
- 1976 — Léo Rabelo (Brazilian voice of Gill Wembley, Wildbreak, Danny Bell and Tarantulas) is born.
- 1984 — The Transformers episode "S.O.S. Dinobots" premieres in the US.
- 1985 — Gea Riva (Italian voice of Miko Nakadai) is born.
- 1986 — Danilo Diniz (Brazilian voice of Teletraan-X) is born.
- 1991 — The Victory episode "Ambush in the Desert" premieres in Malaysia.
- 1992 — Artist Evan Stanley is born.
- 1999 — The Beast Wars Metals episode "Grand Slam Tarans" airs in Japan.
- 2001 — The 2001 Robots in Disguise cartoon episode "Fortress Maximus" premieres in the US.
- 2003 — Armada — Vol:02 is released on DVD in Australia by Warner Music Video.
- 2003 — The Armada episode "Underground" premieres in France.
- 2004 — The trade paperback collection More Than Meets The Eye Volume 1 is released in the US by Dreamwave Productions.
- 2009 — The Animated episode "Three's a Crowd" premieres in Latin America.
- 2010 — Transformers: Sector 7 #2 is released by IDW Publishing.
- 2012 — TakaraTomy releases United EX Roadmaster and Masterpiece MP-12 Lambor.
- 2012 — The Super Robot Lifeform Transformers: Prime episode "SOS, "Unable to Transform!? SOS Bumblebee" premieres in Japan.
- 2013 — The Transformers: Prime episode "Minus One" premieres in Spain.
- 2018 — TakaraTomy releases Masterpiece MP-42 Cordon, Masterpiece Movie MPM-7 Bumblebee, Power of the Primes PP-32 Alpha Trion, PP-33 Skrapnel, PP-34 Autobot Tailgate, PP-35 Autobot Novastar, and PP-36 Autobot Inferno, and Studio Series SS-16 Bumblebee, SS-17 KSI Sentry, and SS-18 Starscream.
- 2018 — The Cyberverse episode "Shadowstriker" airs on Cartoon Network.
- 2018 — Transformers: Cyberverse episode "Fractured" and "and Memory" premieres in Germany and also on Hungarian television.
- 2018 — The Cyberverse episode "Whiteout" premieres in Italy.
- 2019 — The Cyberverse episode "The Crossroads" premieres in France.
- 2021 — Transformers #36, Beast Wars #9, and Shattered Glass #3 are released by IDW Publishing.
- 2021 — Hasbro Pulse hosts a 1027 Premium Event stream, reveals and also pre-orders go up for Selects Lift-Ticket.
- 2022 — Hasbro Pulse hosts a 1027 Premium Event stream, reveals the HasLab Victory/Legacy Decepticon Deathsaurus with Tigerchest and Eaglechest campaign which begins from October 27 till December 12.
- 2022 — New Zealand MINT announces the Transformers G1 Bumblebee 1oz silver coin.
- 2023 — Hasbro releases the "Hasbro Pulse Premiums 1027 Event" video to YouTube, including the official reveal of Legacy: United Commander-class Magmatron, and full details on Collaborative Code Red, both of which immediately go up for pre-order.
- 2024 — Hasbro Pulse Premium 1027 Event takes place officially revealing Studio Series 86 Devastator and Age of the Primes Megatronus The Fallen.
- 2024 — The Transformers: EarthSpark episode "Control Alt Delete" premieres on YTV in Canada.
- 2025 — Preorders go up for Age of the Primes Wave 4.
- ???? — Takaki Ōtomari (Japanese voice of Soundwave in Bumblebee) is born.
- 1941 — Director Akira Hamada is born.
- 1947 — Jean Barney (French voice of Tigatron in Beast Wars) is born.
- 1948 — Gileno Santoro (Brazilian voice of Yoketron and the small Colossus Rhodes) is born.
- 1949 — Walmir Barbosa (Brazilian voice of L. W. Wilder and Diagnostic Drone) is born.
- 1952 — The Japanese channel NTV (broadcaster of the Japanese Generation One era shows) is founded.
- 1958 — Ruth Toscano (Mexican voice of Botanica and Scatterspike) is born.
- 1964 — Fabio Boccanera (Italian voice of Energon Shockblast) is born.
- 1965 — Composer Katsuhiro Hayashi is born.
- 1967 — Alexandre Moreno (Brazilian voice of Rattrap, Hot Shot and William Lennox) is born.
- 1974 — Brent Miller (voice of Armada and Energon Hot Shot) is born.
- 1978 — Gustavo Martinez (Brazilian voice of Thunderhowl) is born.
- 1981 — Stefano Sperduti (Italian voice of Clogstopper) is born.
- 1985 — The Transformers episode "The God Gambit" premieres in the US.
- 1987 — Rob Gavagan (voice of Prime Wars Trilogy Devastator) is born.
- 1990 — The Super-God Masterforce episode "A New Friend, Sixshot" premieres in Malaysia.
- 1998 — The Beast Wars II episode "The End of Starscream" premieres in Japan.
- 2000 — The Beast Machines episode "Spark of Darkness" premieres on Fox Kids in the U.S.
- 2003 — The Armada episode "Ruin" premieres in France.
- 2004 — Energon Slugslinger is released in Japan as a Toys"R"Us-exclusive "USA Edition" (under the name "Storm Jet").
- 2008 — Transformers Animated: The Game is released in Europe.
- 2009 — All Hail Megatron Volume 3 trade paperbacks is released by IDW Publishing.
- 2014 — Eberhard Prüter (German voice of Jetstorm and Que) passes away.
- 2014 — CBS All Access is launched in the US.
- 2015 — The Transformers: Redemption is released by IDW Publishing.
- 2017 — The Robots in Disguise episode "Five Fugitives" premieres on Cartoon Network.
- 2017 — TakaraTomy releases Legends LG-47 Kickback & Clouder, LG-48 Gong & Repug, and LG-49 Targetmaster Triggerhappy (with Blowpipe).
- 2018 — The Cyberverse episodes "Allspark" and "The Journey" airs in Germany and Hungary.
- 2018 — Cyberverse episodes "Cube" and "Terminal Velocity" premieres in France.
- 2020 — Secrets & Lies #4 and Galaxies #11 are released by IDW Publishing.
- 2020 — The Generations Selects Special Comic Abominus comic 2 is first published.
- 2022 — The second wave of the EarthSpark toyline is revealed at the London Comic Con.
- 2022 — The Transformers Beyond Reality VR game launches in EU and AU Markets.
- 2023 — TakaraTomy releases TL-41 Dinobot Scowl, TL-42 Swoop, TL-43 Beachcomber, TL-44 Autobot Devcon, TL-45 Axelgrease, TL-46 Nemesis Leo Prime, TL-47 Megatron (Armada Universe), SS GE-01 Optimus Prime, SS GE-02 Bumblebee, SS GE-03 Decepticon Barricade and Beast Wars: Super Lifeform Transformers Again BWVS-03 Instant Showdown: Cheetus VS Waspeeter, as well as the entire first wave of the EarthSpark toyline.
- 2023 — Hasbro hosts a panel at MCM London Comic Con officially revealing the first wave of Studio Series for 2024.
- 2024 — Preorders for the Studio Series 86 Scrapper and Bonecrusher go up.
- 1942 — Claudio De Davide (Italian voice of Starscream) is born.
- 1960 — Juan Carlos Gustems (Castilian Spanish voice of Ratchet in the live-action film series) is born.
- 1970 — Michael Daingerfield (English voice of Armada Wheeljack, Inferno/Roadblock and Quickmix) is born.
- 1979 — Comic artist Emil Cabaltierra is born.
- 1980 — Mariana Ortiz (Mexican voice of Jenny and Nightra) is born.
- 1982 — So Jeong-hwan (Korean voice of Underbite and Malodor) is born.
- 1985 — The Transformers episode "The Core" premieres in the US.
- 1997 — The Beast Wars episode "Convoy Disappeared" premieres in Japan.
- 2003 — More Than Meets The Eye issue #7 is published in the US by Dreamwave Productions.
- 2003 — Legends of the Microns — Volume 7 is released on DVD in Japan by Columbia Music Entertainment, coming with the "Linkage Part 7" mini-comic and exclusive Twirl toy.
- 2005 — The Galaxy Force episode "Showdown! Lori Vs Chromia" premieres in Japan.
- 2008 — Transformers: Armada Volume 1 TPB is released by IDW Publishing.
- 2010 — Bernard Musson (French voice of Ironhide and Kup in The Transformers: The Movie) passes away.
- 2011 — The Transformers: Prime episode "Deus ex Machina" premieres in Italy.
- 2011 — The Transformers: Prime episode "Convoy" premieres in Spain.
- 2013 — "A New Menace! The Giant Soldier Devastator Appears!" is uploaded to the TakaraTomy Kre-O webite.
- 2014 — More than Meets the Eye #34 is released by IDW Publishing.
- 2015 — The fifth and final BotCon 2016 box set exclusive General Sea Clamp is revealed.
- 2016 — The Robots in Disguise episode "Strongarm's Big Score" premieres on Cartoon Network in the US.
- 2016 — TakaraTomy releases Masterpiece MP-32 Convoy (Beast Wars) and MP-11NT Thrust, Unite Warriors Lynxmaster and Adventure TAV 57 Hyper Surge Starscream, TAV 58 Windstrike & Sideswipe Wind Armor, TAV 59 Ratchet, and TAV 60 Bisk.
- 2017 — The Robots in Disguise episode "Enemy of My Enemy" premieres on Cartoon Network in the UK.
- 2017 — Transformers: The Last Knight is released on DVD in Brazil.
- 2019 — The Cyberverse episode "Parley" premieres in Brazil.
- 2021 — Transformers Brand Team Roundtable Q&A and the official reveal of WFC-K44 Autobot Blaster & Eject.
- 2022 — TakaraTomy releases Studio Series SS-90 Bumblebee, SS-91 Sideways and SS-92 Arcee and Legacy TL-07 Wild Rider, TL-08 Knock Out, TL-09 Jhiaxus and TL-10 Blitzwing.
- 2022 — Hasbro officially reveals Holiday Optimus Prime & Generations Selects Magnificus at the London Comic Con. Preorders for them will go up November 1.
- 2023 — The Transformers: EarthSpark episode "Bumblebee Ganbarbee" premieres in Japan.
- 2024 — Preorders for the Studio Series SS-116 Bumblebee, SS-118 Apelinq and the SS-102 Optimus Prime package refresh go up.
- 2025 — Marvel UK artist Pete Knifton passes away.
- ???? — Illustrator Rui Onishi is born.
- 1931 — Dick Gautier (voice of Hot Rod/Rodimus Prime, Firebolt and Apeface in the original TV series) is born.
- 1946 — Katsuhisa Hōki (Japanese voice of Armada Smokescreen, Punch/Counterpunch, Zarak, Duros and Uncle Hank) is born.
- 1946 — Model and background designer Pat Agnasin is also born.
- 1957 — Kevin Pollak (voice of Fracture) is born.
- 1964 — Tabitha St. Germain (voice of Alexis Thi Dang and Lucy Suzuki) is born via an unlikely genetic collision.
- 1970 — Billy Brown (second voice of Prime Cliffjumper) is born.
- 1971 — Antti Jaakola (Finnish voice of Huxley Prescott and Woodrow Burns) is born.
- 1975 — Muhamad Nur (Indonesian voice of Alex Malto) is born.
- 1985 — The Transformers episode "Make Tracks" premieres in the US.
- 1986 — The Transformers episode "The Dweller in the Depths" premieres in the US.
- 1995 — Andy Pessoa (voice of Raf Esquivel) is born.
- 1999 — The Beast Machines episode "Revelations Part I: Discovery" premieres in the US.
- 2003 — The Transformers is released in Japan by Atlus for the PlayStation 2.
- 2003 — The Armada episode "Prehistory" premieres in France.
- 2010 — The Animated episode "Wasp's Revenge" premieres in Japan.
- 2010 — TakaraTomy releases Movie Masterpiece MPM-1 Starscream.
- 2011 — The Transformers: Prime episodes "Speed Metal" and "Predatory" premieres in Italy.
- 2012 — Transformers: Prime - The Game is released for the Nintendo DS, Nintendo 3DS, and Nintendo Wii.
- 2012 — The Transformers Prime episode "Loose Cannons" premieres in Germany.
- 2012 — The Transformers: Rescue Bots episode "Flobsters on Parade" premieres in France.
- 2013 — Beast Hunters #6 and Robots in Disguise #22 are released by IDW Publishing.
- 2013 — Transformers: The Ultimate Pop-Up Universe is published by Little, Brown and Company.
- 2014 — The Angry Birds Transformers game by Rovio is released for Android devices.
- 2014 — Transformers Cloud: Spacetime World: Guardians of Time Chapter 4: Part 6 is first published.
- 2016 — Imre Józsa (Hungarian voice of Cyclonus/Snow Cat and Skids) dies at age 62.
- 2017 — Fábio Vilalonga (Brazilian voice of Slag, Wreck-Gar and Tarantulas) dies at age 61.
- 2017 — The Transformers: Dark of the Moon is released in 4K Ultra HD and Blu-ray to home media in the United Kingdom.
- 2018 — The Cyberverse episode "The Journey" premieres in Brazil.
- 2019 — Galaxies #2 is released by IDW Publishing. Transformers: The Definitive G1 Collection Volume 70: Punishment is released by Hachette Publishing.
- 2020 — Writer Susan K. Williams passes away at age 76.
- 2021 — TakaraTomy releases Kingdom KD-13 Rhinox, War for Cybertron Trilogy WFC-18 Cheetor, and Premium Finish PF WFC-01 Optimus Prime and PF SS-01 Bumblebee.
- 2025 — The Transformers Studio Series Spotlight Optimus Prime 3-Pack at Lucca Comics and Games 2025 and preorders go up for it.
- Every year — Halloween!
- ???? — Hirofumi Tanaka (voice of Legion) is born.
- 1943 — Melendy Britt (voice of Alana) is born with the honour of Grayskull!
- 1946 — Alfonso Ramírez (Mexican voice of Dinobot II, Beast Machines Optimus Primal, Boulder and Optimus Prime) is born.
- 1948 — Barry Stigler (voice of Scourge in Robots in Disguise) is born.
- 1957 — Jörg Hengstler (German voice of Scrapper) is born.
- 1960 — Rubén Moya (Mexican voice of John Keller in Transformers) is born.
- 1968 — Ronaldo Artinic (Brazilian voice of Jazz, Astrotrain and Scrapper) is born.
- 1970 — The world brings the noise as Nolan North (voice of Sideswipe, Brawl, Smokescreen, Swindle and others) is born.
- 1976 — Actor Jamison Yang ("Analyst" in the live-action movie) is born.
- 1976 — Víctor Ugarte Fonseca (Mexican voice of Sam Witwicky, Quillfire and the adult Cody Burns) is born.
- 1976 — Comic book artist Andrew Froedge is also born. Busy day.
- 1979 — Andy Barnett (voice of War for Cybertron Trilogy Rhinox) is born
- 1983 — Voice actress Angela Galuppo is born.
- 1983 — Jonathan Guedes (Brazilian voice of Soundwave) is born.
- 1985 — The Transformers episode "The Autobot Run" premieres in the US.
- 1986 — The Transformers episode "Nightmare Planet" premieres in the US.
- 1986 — The Fight! Super Robot Lifeform Transformers episode "Stop the Transform!" premieres in Japan.
- 1989 — The Victory episode "Jan - Defend the Campus!!" premieres in Japan.
- 1998 — The second Beast Wars II OP single "SUPER VOYAGER" is released in Japan by Columbia Music Entertainment.
- 2003 — The Legends of the Microns episode "帰還 (せいばーとろん) - uprising" premieres in Japan.
- 2003 — The Armada episode "Miracle" premieres in the US.
- 2003 — The Armada episode "Swoop" premieres in France.
- 2006 — The 30th show in the Kiss Players radio drama series airs in Japan on the "Transformers Kiss Play: Transformers News Center" program.
- 2006 — Daoiz Cabezudo (Brazilian voice of Galvatron and Ravage) passes away at age 60.
- 2007 — Beast Wars Sourcebook #2 is released by IDW Publishing.
- 2011 — Transformers Classified: Switching Gears is released in the US.
- 2011 — The Transformers: Prime episode "Deus ex Machina" premieres in Spain.
- 2011 — The Transformers: Prime episode "Rock Bottom" premieres in South Korea
- 2012 — The Transformers: More than Meets the Eye #10 and The Transformers Classics, Vol. 4 are released by IDW Publishing.
- 2012 — The Transformers: Rescue Bots episode "The Alien Invasion of Griffin Rock" premieres in France.
- 2015 — Hans Teuscher (German voice of Theater Landlord) dies at age 78.
- 2020 — TakaraTomy releases Masterpiece Movie MPM-10 Starscream.
- 2023 — On this Transformers Tuesday, pre-orders go up for the first wave of Studio Series for 2024.
