This movie is about the night of the 1975 premiere of NBC's Saturday Night, later known as Saturday Night Live.
"At 11:30pm on October 11, 1975, a ferocious troupe of young comedians and writers changed television -- and culture -- forever. Directed by Jason Reitman and written by Gil Kenan & Reitman, Saturday Night is based on the true story of what happened behind the scenes in the 90 minutes leading up to the first broadcast of Saturday Night Live. Full of humor, chaos, and the magic of a revolution that almost wasn't, we count down the minutes in real time until we hear those famous words...."
"Saturday Night Live (SNL) is an American late-night live sketch comedy variety show created by Lorne Michaels and developed by Michaels and Dick Ebersol that airs on NBC. The show's premiere was hosted by George Carlin on NBC on October 11, 1975, under the original title NBC's Saturday Night. The show's comedy sketches, which often parody contemporary American culture and politics, are performed by a large and varying cast of repertory and newer cast members. Each episode is hosted by a celebrity guest, who usually delivers the opening monologue and performs in sketches with the cast, with featured performances by a musical guest. An episode normally begins with a cold open sketch that is usually based on political events and ends with someone breaking character and proclaiming, "Live from New York, it's Saturday Night!", properly beginning the show."