CBS began doing all-night network hourly newscasts on April 1, 1973. To mark the event, it ran full page ads in the trade magazines, showing the outside of a 24 hour supermarket to stress that news shouldn't stop during overnight hours. Until then, there were several hours a day where no newscasts were broadcast. I guess that was from an era when many affiliates were not on the air around the clock.
But I always wondered, if you are supplying an 11pm or 12am newscast for your West Coast affiliates, and a 5 or 6am newscast for your East Coast affiliates, that leaves only a three or four hour gap. So it wasn't a big step to add newscasts in those gap hours.
Why CBS didn't go 24/7 earlier? The All-News format began on WCBS in 1967. KNX, KCBS and WBBM went All-News in 1968. When there was no overnight network news, the anchor simply would read national news stories himself?
And how about NBC and ABC? Did they also begin 24/7 hourly newscasts around the same time? I know Mutual had round-the-clock network newscasts, top and bottom of the hour, when the Larry King Show was being carried. That began in 1978, five years later.
But I always wondered, if you are supplying an 11pm or 12am newscast for your West Coast affiliates, and a 5 or 6am newscast for your East Coast affiliates, that leaves only a three or four hour gap. So it wasn't a big step to add newscasts in those gap hours.
Why CBS didn't go 24/7 earlier? The All-News format began on WCBS in 1967. KNX, KCBS and WBBM went All-News in 1968. When there was no overnight network news, the anchor simply would read national news stories himself?
And how about NBC and ABC? Did they also begin 24/7 hourly newscasts around the same time? I know Mutual had round-the-clock network newscasts, top and bottom of the hour, when the Larry King Show was being carried. That began in 1978, five years later.