Dear 100 Hour Board,
Have you ever actually seen a TV channel go off for the night by playing the Star Spangled Banner while showing an American flag followed by the screen just going to vertical color bars? I've heard that's what used to happen before pretty much all stations were on 24 hours a day.
Well, there was that one time in Toy Story 2. Other than that, no, it was too long ago.
I think I can remember seeing off-air test patterns, but I'm having a hard time finding definitive information about when stations made the switch to 24-hour programming. Given the fickleness of memory I can't be 100% sure it's a real memory.
-Curious Physics Minor