As the World Turns is an American television soap opera that aired on CBS for 54 years from April 2, 1956, to September 17, 2010. Irna Phillips created As the World Turns as a sister show to her other soap opera Guiding Light. With 13,763 hours of cumulative narrative, As the World Turns has the longest total running time of any television show. In terms of continuous run of production, As the World Turns at 54 years holds the fourth-longest run of any daytime network soap opera on American television, surpassed only by General Hospital, Guiding Light, and Days of Our Lives. As the World Turns was produced for its first 43 years in Manhattan and in Brooklyn from 2000 until 2010.

Guiding Light is an American radio and television soap opera. Guiding Light aired on CBS for 57 years between June 30, 1952, and September 18, 2009, overlapping a 19-year broadcast on radio between January 25, 1937, and June 29, 1956. With 72 years of radio and television runs, Guiding Light is the longest-running soap opera, ahead of General Hospital, and is the fifth-longest-running program in all of broadcast history; only the American country music radio program Grand Ole Opry, the BBC religious program The Daily Service (1928), the CBS religious program Music and the Spoken Word (1929), and the Norwegian children's radio program Lørdagsbarnetimen (1924–2010) have been on the air longer.