<P> MyNetworkTV originally started as a conventional network with a format primarily consisting of English language telenovelas ; however , after experiencing continued low ratings for its prime time - exclusive schedule ( even after several programming revamps that followed over the next three years after the initial format faltered ) , it converted into a `` broadcast syndication service '' in September 2009 , adopting a format made up of reruns of series originally aired on other networks for ten hours a week on Monday through Fridays . Ion broadcasts 24 hours a day , seven days a week ( though only eighteen hours of its schedule each day consist of entertainment programming , with infomercials and religious programming making up the remainder of the schedule ) , making the Ion network the largest English - language commercial television network to be totally responsible for its affiliates ' programming . Ion differs from other commercial networks in that the majority of its stations are owned - and - operated by its parent company with very few affiliates , and it is distributed exclusively via cable and satellite in markets where the network does not have a local station ; Ion was the last of the seven conventional English language commercial broadcast networks to expand into distribution via digital multicasting , having relied entirely on cable and satellite distribution in markets where it otherwise could not maintain a primary affiliation until 2014 , when it began accepting subchannel - only affiliates through deals with Telemundo Station Group and Media General . </P>
<P> MyNetworkTV originally started as a conventional network with a format primarily consisting of English language telenovelas ; however , after experiencing continued low ratings for its prime time - exclusive schedule ( even after several programming revamps that followed over the next three years after the initial format faltered ) , it converted into a `` broadcast syndication service '' in September 2009 , adopting a format made up of reruns of series originally aired on other networks for ten hours a week on Monday through Fridays . Ion broadcasts 24 hours a day , seven days a week ( though only eighteen hours of its schedule each day consist of entertainment programming , with infomercials and religious programming making up the remainder of the schedule ) , making the Ion network the largest English - language commercial television network to be totally responsible for its affiliates ' programming . Ion differs from other commercial networks in that the majority of its stations are owned - and - operated by its parent company with very few affiliates , and it is distributed exclusively via cable and satellite in markets where the network does not have a local station ; Ion was the last of the seven conventional English language commercial broadcast networks to expand into distribution via digital multicasting , having relied entirely on cable and satellite distribution in markets where it otherwise could not maintain a primary affiliation until 2014 , when it began accepting subchannel - only affiliates through deals with Telemundo Station Group and Media General . </P>
when did television started broadcasting 24 hours a day
when did television started broadcasting 24 hours a day
September 2009
September 2009