I have to admit, I haven't needed to call POPCORN since back when I was a teenager. (And I didn't realize that POPCORN was a California-specific thing, either.) Nowadays, I'm so surrounded by battery-backed time-telling electronics that I don't even bother to wear a watch. Still, it's the end of a piece of communications nostalgia.
"At the sound of the beep, the time is unknown."