I had no idea that digital clocks time themselves by by measuring the mains frequency. And that this is an intended, albeit very minor, function of the power gr

I had no idea that digital clocks time themselves by by measuring the mains frequency. And that this is an intended, albeit very minor, function of the power grid! It's amazing how things that provide only a tiny benefit to any individual but has an effect on such a massive scale that people actually sit down and spend time making it work.