Flag Day
- Blwyddyn: 2021
- Gwlad: Canada, United Kingdom, United States of America
- Genre: Drama, Thriller, Crime
- Stiwdio: Ingenious Media, New Element Media, RocketScience, Wonderful Films, Rahway Road Productions, Clyde Is Hungry Films, Conqueror Productions, Buffalo Gal Pictures
- Allweddair: daughter, based on novel or book, bank robber, father, based on true story
- Cyfarwyddwr: Sean Penn
- Cast: Sean Penn, Dylan Penn, Hopper Penn, Josh Brolin, Katheryn Winnick, Eddie Marsan