Anniversaries/May 31
From Sonic Retro
May 31 (add)
- 1982 — Ian Flynn, writer for both the Archie Sonic and IDW Publishing line of Sonic the Hedgehog comic series, is born.
- 1996 — Both volumes of the Sonic the Hedgehog OVA are released for sale on VHS in Japan.
- 2000 — Issue #182 of Sonic the Comic is released in the United Kingdom.
- 2004 — Sonic Underground Vol.1 and Vol.2, both DVDs, are released in the United Kingdom.
- 2006 — Issue #9 of the Sonic X comic series is released in North America.
- 2007 — Issue #20 of the comic series Sonic X is released in North America.
- 2018 — "& Knuckles", the third episode of Sonic Mania Adventures, is released on YouTube.