A list of events that occurred on September 1 related to Six Flags.

• 2000 – Keith Shartle dies.
• 2011 – Six Flags announces Apocalypse for Six Flags America.

• 2018 – #ThrowShine Day at Six Flags Over Texas, Six Flags Over Georgia, Six Flags St. Louis, Six Flags Magic Mountain, Six Flags Great America, Six Flags Discovery Kingdom, Six Flags Fiesta Texas, Six Flags America, Six Flags New England, and Great Escape.