HBO 6 Years Ago August 8, 2017 Hard Knocks Season 12 US Release DateThe tv series season Hard Knocks Season 12 is already released on HBO in the USA. Release Dates!Report Date / Submit ProductUSAAllUSAUKReport Date / Submit ProductHBOAugust 8, 2017ConfirmedTrackingTrack1112TRACK11Buy NowHard Knocks Season 12TV Series SeasonHBOHard Knocks is a reality sports documentary television series produced by NFL Films and HBO.DocumentaryRealitySportMarty CallnerLiev SchreiberJerry JonesEmmitt Smith