- 1998 — Issue #11 of the Knuckles the Echidna comic series is released in North America. Issue #123 of Sonic the Comic is released in the United Kingdom.
- 2006 — Teasing Time, the 67th episode of Sonic X, airs in North America.
- 2007 — The Xbox 360 is released in Russia, with Sonic the Hedgehog released as one of the launch titles.
- 2009 — Issue #197 of Sonic the Hedgehog by Archie Comics is released in North America.
- 2013 — BFDIA 5b, a Flash game, is released for the PC via Adobe Flash Player supported websites in North America as the second part of the fifth episode of Battle for Dream Island Again.
- 2015 — Issue #269 of Sonic the Hedgehog by Archie Comics and the final volume of Sonic the Hedgehog Archives are released in North America.
- 2017 — FiendBot, the 66th episode of Sonic Boom, airs in North America.
- 2020 — Sonic the Hedgehog Volume 5: Crisis City, the fifth trade paperback of the Sonic the Hedgehog comic series by IDW Publishing is released in the United Kingdom.