From Sonic Retro
December 3 (
- 1994 — "The Doomsday Project", the 26th and final episode of Sonic the Hedgehog, airs in North America.
- 1997 — Issue #9 of the comic series Knuckles the Echidna is released in North America.
- 2005 — "Mission: Match Up", the 65th episode of Sonic X, airs in North America.
- 2009 — Mario & Sonic at the Olympic Winter Games is released for the Nintendo DS in South Korea. Issue #207 of the Sonic the Hedgehog comic series by Archie Comics is released in North America.
- 2014 — Issue #2 of the Sonic Boom comic series is released in North America.
- 2016 — "Alone Again, Unnaturally", the 56th episode of Sonic Boom, airs in North America.