Anniversaries/February 14
From Sonic Retro
February 14: Valentine's Day (add)
- 1997 — Sonic & Knuckles Collection is released for the PC in Japan. Sonic 3D: Flickies' Island is released for the Sega Saturn in Europe.
- 2004 — "Cruise Blues", the 20th episode of Sonic X, airs in North America.
- 2006 — Sonic the Hedgehog Mobile is released for J2ME compatible phones in Europe.
- 2012 — Mario & Sonic at the London 2012 Olympic Games is released for the Nintendo 3DS in North America. Sonic the Hedgehog: Love Stinks! the first "Archie Digital Exclusive" comic compilation, is released on the official Archie Comics app.
- 2015 — "Unlucky Knuckles", the 13th episode of Sonic Boom, airs in North America.
- 2019 — drx releases a prototype of Sonic the Hedgehog 2 for the Sega Mega Drive that was originally leaked by CENSOR before the game's release.
- 2020 — Sonic the Hedgehog: The Official Movie Novelization is published in North America. The Sonic the Hedgehog film premieres in theaters in North America and Europe. Sonic the Hedgehog: Music from the Motion Picture is made available to download from Amazon and iTunes in Japan, North America, and Europe.
- 2023 — Sonic the Hedgehog Volume 13: Battle for the Empire, a trade paperback from IDW Publishing, is released in the United Kingdom.