Anniversaries/April 1
From Sonic Retro
April 1: April Fools' Day (add)
- 1984 — Nineko's birthday.
- 1994 — The build date of Sonic Crackers for the Sega Mega Drive.
- 2013 — Sonic the Hedgehog CD Lite is released for Android devices worldwide.
- 2015 — The Big Box version of Adventures of Sonic the Hedgehog Collector's Set, a DVD, is released in Australia.