Back in the day, when I was small, I remember waking up too early for TV to be on. I woke up too early for TV to be on.
If you are under 20, you have no idea what I just said. My brothers and sisters would run downstairs in our jammies on a Saturday morning to watch cartoons, but TV didn’t come on until 6am, so it was possible to wake up too early. 
You’d walk over to the TV (which was a piece of furniture with a protective doily and a plastic bowl of plastic fruit on it) and you’d pull out the “on” knob and you’d wait three minutes for it to warm up.
And if you got up too early, you’d see a test pattern.
I remember staying up past the late show that was over at midnight and hearing an announcer say, “That brings us to the end of our broadcasting day.”
The Star Spangled Banner would play. The test pattern would cover the screen. You’d walk over to the TV and push in the “on” knob and a little dot of light from the cathode ray would crawl back into a vacuum tube and go to sleep with Andy and Opie and Lucy and Ricky.
I’m in Las Vegas for the of bloggers. My grandchildren live 90 miles from here in Mesquite.