Soap opera soap opera "Guiding Light" (originally titled "The Guiding Light" until 1975) started as a radio drama in January 1937 and subsequently transferred to television in June 1952. With the exception of several years in the late 1940s, during which creator Irna Phillips was involved in a dispute with Procter & Gamble, "Guiding Light" was heard or seen nearly every weekday from 1937 until 2009, making it the longest story ever told in a broadcast medium. Originally serials were broadcast as fifteen-minute installments each weekday in daytime slots. In 1956, "As the World Turns" and "The Edge of Night", both produced
Soap opera typical of American daytime soaps; all of the others ran half-hour episodes. Unlike American or British soap operas, the most influential of which have run for years or even decades, even daily Canadian soap operas have run for a few seasons at most. Short-run soaps, including "49th & Main" and "North/South", have also aired. Many of these were produced in an effort to comply with Canadian content regulations, which require a percentage of programming on Canadian television to originate from Canada. Notable prime time soap operas in Canada have included "Riverdale", "House of Pride", "Paradise Falls", "Lance et Compte" ("He