Production summary Start date End date Time slot (ET/CT) Run time (minutes) Network Filming location Notes January 25, 1937 October 13, 1939 — 15 NBC Red Radio Chicago Canceled by Procter & Gamble, resulting in 75,000 protest letters.[1] January 22, 1940 March 15, 1942 NBC Blue Radio Sponsored by Procter & Gamble March 16, 1942 November 29, 1946 NBC Red Radio Canceled by General Mills.[1] June 2, 1947 1949 12:45 pm/11:45 am CBS Radio Hollywood Sponsored by Procter & Gamble 1949 June 29, 1956 CBS New York City July 2, 1956 September 6, 1968 CBS Television September 9, 1968 September 1, 1972 2:30 pm/1:30 pm 30 — September 4, 1972 November 28, 1975 2:00 pm/1:00 pm December 1, 1975 November 4, 1977 2:30 pm/1:30 pm November 7, 1977 February 1, 1980 2:30 pm/1:30 pm 60 February 4, 1980 September 18, 2009 3:00 pm/2:00 pm As early as 1993, some affiliates began airing the show at 9:00 am, 10:00 am, or noon local time in favor of local programming airing at 3:00 pm on some CBS affiliates.