A list of events that occured on May 23 related to Six Flags.
- 1978 – Lightnin' Loops opens at Six Flags Great Adventure.
- 2014 – New England SkyScreamer opens at Six Flags New England.
- 2015 – Twisted Colossus opens at Six Flags Magic Mountain
- 2015 – Batman: The Ride opens at Six Flags Fiesta Texas.
Other events[]
- 1981 – American Eagle opens at Marriott's Great America.