Anniversaries/April 20
From Sonic Retro
April 20 (add)
- 1995 — Issue #24 of the Sonic the Hedgehog comic series by Archie Comics is released in North America.
- 2003 — "Dr. Eggman no Yabou", the 3rd episode of Sonic X, airs in Japan.
- 2005 — Issue #148 of the Sonic the Hedgehog comic series by Archie Comics is released in North America.
- 2007 — Sonic Jump is released for mobile devices in Europe.
- 2011 — Sonic the Hedgehog 2 is released for the PlayStation 3 in Europe and Australia. Issue #27 of Sonic Universe is released in North America.
- 2020 — "Egguman Kantai Genru!", the 70th episode of Sonic X, airs in Japan.