Subtitle Zero Dark Thirty Direct

: The term is a play on the 24-hour military clock. "Zero" refers to the hours before 10 a.m. (starting with 0), "Dark" denotes the nighttime or pre-dawn hours, and "Thirty" indicates 30 minutes past the hour.

The title of the 2012 film serves as both a literal reference to a specific military time and a metaphor for the secrecy surrounding the hunt for Osama bin Laden. Military Definition and Origins subtitle Zero Dark Thirty

In military slang, "Zero Dark Thirty" refers to an unspecified time in the early morning hours, typically between midnight and dawn. : The term is a play on the 24-hour military clock