I live close to a city that only allows city-owned liquor stores, Eden Prairie MN. But it's trivial to drive to the next city over and shop wherever you want.
Maybe the whole point of this was not to ruin some food, but to prove infiltration of a DoD network in a way that would leak broadly because it's not classified?
I think both WWV and WWVB were on the chopping block a few years ago, because the government decided it wasn't worth the $100,000 per year to keep them running. Thankfully that decision was overturned.
That might do to keep it within a minute during power loss, and maybe that's good enough for most people. But if you really want to be worry-free you need something more high tech.
It would be worth it for me not to have to touch it twice a year for DST.
I once researched how accurate GPS time is, and the answer is it's within 40 ns. Good luck finding a way to transmit that to your CPU that doesn't add a much larger delay.
Is there anything which adjusts your base clock frequency based on NTP or anything else, so that when you are unable to correct the time it's still more accurate than an untuned free-running clock?
(Yes, I realize the € symbol didn't exist until 1996)