The screenplay for
Three Days in August was the winning entry in a screenwriting competition sponsored by the Dallas Film Society in 2015. The competition, entitled The Sionna Project, drew 200 submissions from 26 countries.
Three Days in August was announced in
Variety in October 2015, with
Barry Bostwick,
Mariette Hartley, Ed Hyland, Mollie Milligan,
Meg Foster, Cal Bartlett and
Colton Tapp attached to star and Johnathan Brownlee to direct and produce. == Location ==