A list of events that occurred on May 25 related to Six Flags.
- 2012 – Goliath opens at Six Flags New England.
- 2013
- Iron Rattler opens at Six Flags Fiesta Texas.
- Texas SkyScreamer opens at Six Flags Over Texas.
- 2018 – Twisted Cyclone opens at Six Flags Over Georgia.
- 2019
- Batman: The Ride opens at Six Flags Discovery Kingdom.
- Supergirl Sky Flyer opens at Six Flags St. Louis.