Saturday Night Live (SNL) is a weekly late-night 90-minute American variety show based in New York City that has been broadcast by NBC on Saturday nights since October 11, 1975. In Canada it is simulcast on the Global Television Network. It is broadcast live in the Atlantic, Eastern, and Central time zones, with a two or three hour delay for stations in the Mountain and Pacific Time Zones. It is one of the longest-running network programs in American television history. Each week, the show's cast is joined by a guest host and musical act.
Originally, the show was called NBC's Saturday Night until NBC retitled its show in 1976 (the Saturday Night Live title having been previously attached to a short-lived variety show hosted by Howard Cosell and airing on rival network ABC). The first show with the new title was broadcast on March 26, 1977.
The show — broadcast from Studio 8H at the GE Building (called the RCA Building until 1988) in New York's Rockefeller Center — has been the launching place for many major American comedy stars of the last thirty years. It was created by Canadian Lorne Michaels who, excluding a hiatus from Season 6 through Season 10, has produced and written for the show and remains its executive producer (Jean Doumanian produced almost all of Season 6, and Dick Ebersol produced the last episode of Season 6, and all of Seasons 7–10).