From Sonic Retro
February 6 (
- 2004 — Sonic Adventure DX: Director's Cut is released for PC in Europe and Australia. Sonic Heroes is released for the Nintendo GameCube, PlayStation 2 and Xbox in Europe and Australia.
- 2005 — "Mean Machines", the 43rd episode of Sonic X, airs in North America.
- 2009 — Sonic Chaos is released on the Wii Virtual Console in Europe.
- 2013 — Issue #245 of the Sonic the Hedgehog comic series by Archie Comics and Issue #6 of Sonic Super Special Magazine are released in North America.
- 2019 — Issue #13 of the Sonic the Hedgehog comic series by IDW Publishing is released in North America.
- 2020 — Sonic the Hedgehog Volume 4: Infection, the fourth trade paperback of the Sonic the Hedgehog comic series by IDW Publishing is released in France.
- 2023 — Sonic Colors: Ultimate is released for Steam worldwide.