The exact moment a news station switches from black and white to color TV for the first time, April 14, 1967.
I remember back in the early sixties everyone went down to a neighbor's house to take a look at this new marvel called color television. I believe the Flintstones was on. Star Trec and Batman came later. the reason for all of the hideous colors on tv back then.
Later on, a girlfriend's father had one. It had a radio active warning emblem on the back. The thing emitted radiation. And, I don't think you could run a vacuum cleaner near it for some reason. Maybe it interfered with the signal.