A list of events that occurred on September 29 related to Six Flags.

• 2012 – FestEvil at Six Flags Great Adventure.
• 2017 – Fright Fest 2017 begins at Six Flags St. Louis.
• 2018 – Fright Fest 2018 begins at Great Escape.
• 2018 – Fright Fest 2018 begins at Darien Lake.