December 21

yesterday				tomorrow
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• 1939 — Composer Franco Micalizzi is born.
• 1944 — Paulo Flores (Brazillian voice of Wildrider, Rumble, Devastator, Quintesson Judge and more) is born.
• 1946 — André Filho (Brazillain voice of Windcharger, Greene, Rocksteady and more) is born.
• 1953 — Designer Andy Couzens is born.
• 1955 — Werner Crock von Krumbiegel (German voice of G2 Hot Rod/Rodimus and Powerglide) is born.
• 1959 — Storyboard artist Lindsay Dawson is born in California.
• 1965 — Guillermo Martínez (Latin-American Spanish voice of Demolishor) is born.
• 1972 — Sa Seong-woong (Korean voice of Railspike, Wedge, Landfill, Ironhide, Skid-Z and Movor) is born.
• 1977 — Lyricist Hitomi Mieno is born.
• 1980 — Melanie Isakowitz (German voice of two Windblades) is born.
• 1997 — Beast Wars: Super Lifeform Transformers — Enter the Super Lifeform Transformers and Cheetus' Crisis are released on VHS in Japan by Pioneer LDC.
• 2000 — The Beast Machines episode "Sparkwar Pt. I: The Strike" premieres in Germany.
• 2011 — The Transformers: The Death of Optimus Prime (formerly issue #125) is released by IDW Publishing.
• 2011 — The Transformers: Prime episode "Sick Mind" premieres in Poland.
• 2011 — The Transformers: Prime episode "Rock Bottom" premieres in France.
• 2011 — Pauli Virta (Finnish voice of Starscream, Smokescreen, Bulkhead, Skyblast, Lugnutz, Mike Franklin and Snarl) passes away at age 66.
• 2012 — "Cell" is first published by Eaglemoss/GE Fabbri in Russia.
• 2012 — TakaraTomy releases the Asian market exclusive Classics Seeker Set Ace (Starscream, Skywarp and Thundercracker).
• 2012 — The end of the world. Bummers.

Actual apocalypse may vary.

• 2016 — The Robots in Disguise episode "Worthy" premieres in Hungary.
• 2016 — The Transformers Legends Spin Off Cybertron Magna Convoy prequel comic is first published.
• 2017 — All Transformers games published by Activision are delisted from digital storefronts due to the expiration of their licensing agreement with Hasbro.
• 2018 — The Bumblebee movie is released in Bulgaria, Canada, Estonia, Lithuania, South Africa, Turkey, U.S. and Vietnam.
• 2018 — The Bumblebee (Motion Picture Soundtrack) is released by Republic Records.
• 2018 — The Bumblebee (Motion Picture Score) album is released on digital by Paramount Music.
• 2018 — The Cyberverse episode "Awaken Sleeping Giants" airs on the Cartoon Network app and website.
• 2019 — Achille Orsoni (French voice of Thundercracker in the War for Cybertron video game) passes away.
• 2019 — The Cyberverse episode "Ghost Town" premieres in Germany and the U.S..
• 2023 — The Transformers Classics Vol. 6 is published by Hero-X.
• 2024 — Hasbro officially reveals the Studio Series 86 Constructicon Hook and Constructicon Long Haul.
• 2024 — The Transformers: EarthSpark episode "Judgment Day, Part 1" premieres in Germany.
• 2025 — The EarthSpark episode "Fire and Ice" premieres in Cantonese.