> When did TV start to run 24 hours?

When did TV start to run 24 hours?

Posted at: 2015-04-20 
It was in the 80s

1964

by the 70's most channels were 24/7 except maybe smaller local ones

im not sure but I am sure the ninetys was the best

I am doing a story about someone in the early 90s with cable, and I want to know when channels like, NBC, CBS, Disney channel, ABC family and Fox started to run 24 hours? I know MTV ran 24 hours, but what about the other channels? The person in my story lives in NYC and is sort of wealthy.