When Does "Frost/Nixon" (2006) Take Place?
"Frost/Nixon" is a historical fiction stageplay written by Peter Morgan and first performed on August 10th, 2006. So when is "Frost/Nixon" set?

It takes place in the year:
It was adapted to film in 2008.

1977 AD
We know this because its opening includes the real-world resignation speech of United States of American President Richard M. Nixon, which occurred on August 8th, 1974 AD. The play then jumps ahead to the hiring of the researchers to prepare for the upcoming interviews in 1976 AD. We know this happened in May of 1976 AD in the real world based on the account of one of the men hired to assist David Frost conduct these interviews, James Reston Jr.
However, the majority of the play depicts the real-world taping of the famous interviews between Frost and former president Nixon that began recording on March 23rd, 1977 AD.
It was adapted to film in 2008.