The Movie Timeline - be obsessive, be very obsessive
True Grit - timeline
15th July: Reuben Cogburn is born.
Saturday 18th July: The date on the flyer for the Wild West Show that Cogburn sent to Ross.
Wednesday 12th August: Reuben "Rooster" Cogburn dies. (Jonesboro, Arkansas)
Saturday 15th August: Mattie Ross arrives at the Wild West Show and discovers that Rooster had died 3 days earlier.