From Sonic Retro
July 21 (
- 1999 — Issue #75 of the Sonic the Hedgehog comic series by Archie Comics is released in North America. Total Sonic Special, a comic, is released in the United Kingdom.
- 2015 — "Eggman the Auteur", the 33rd episode of Sonic Boom, airs in North America.
- 2021 — Issue #42 of the Sonic the Hedgehog comic series by IDW Publishing is released in North America.