From Sonic Retro
December 14 (
- 2003 — "Space Colony Ark no Tatakai", the 37th episode of Sonic X, airs in Japan.
- 2005 — Issue #4 of the Sonic X comic series is released in North America.
- 2011 — Sonic the Hedgehog CD is released for the Xbox 360 in North America, Europe, and Australia, for Android devices in North America and Europe, and for the PlayStation 3 in Europe and Australia.
- 2016 — Issue #93 of Sonic Universe and Sonic Boom Volume 2: Boom Shaka-laka, a trade paperback, are released in North America.