A list of events that occurred on May 28 related to Six Flags.
- 1999 – Poltergeist opens at Six Flags Fiesta Texas.
- 2004 – Ragin' Cajun opens at Six Flags Great America.
- 2005 – Hurricane Harbor opens at Six Flags Great America.
- 2011 – Road Runner Express opens at Six Flags Magic Mountain.
- 2016
- The Joker opens at Six Flags Great Adventure.
- Greezed Lightnin' opens at The Great Escape.
- 2019 – El Diablo opens at Six Flags Over Texas.
- 2022 - DC Universe opens at Six Flags Great America.