Anniversaries/May 18
From Sonic Retro
May 18 (add)
- 2003 — "Daikonsen! Chris no Home Party", the 7th episode of Sonic X, airs in Japan.
- 2005 — Issue #149 of the Sonic the Hedgehog comic series by Archie Comics is released in North America.
- 2011 — Sonic Adventure Original Soundtrack 20th Anniversary Edition is released in Japan. Issue #28 of Sonic Universe and Volume 15 of Sonic the Hedgehog Archives are released in North America.
- 2020 — Sonic the Hedgehog 1: Fallout!, a trade paperback, is released in Japan.