Quick answer: No way!
This computer is synced to “the internet” and has to be reset (it does so automatically every couple weeks or so) periodically. I just now reset it.
The cable box controls the time on the display over the TV but it is separate from the TV’s own timer. They are rarely in sync and drift apart up to five minutes before I’ll reset the TV’s clock.
I haven’t worn a watch in years. When I did I would try to keep it close to the TV time (or computer) on The Weather Channel. The watches I had kept decent time and were rarely off by more than two seconds from the Naval Observatory time – when I bothered to check them.
Other digital timers on radios, coffee maker, clocks and such are nowhere near the same time and probably have a range of at least five minutes.
I have always been distrustful of published timelines based on clock readings from multiple sources. Best example, 9/11! There’s no way those things can be more accurate than a few minutes.
What’s most annoying is that we have to add two minutes to the recording time when DVRing shows. Even the cable company’s times are fucked up! Shows start late and finish early, and if there’s some smart way to express why that happens, I have yet to hear it. We’re always missing the last few minutes of shows we haven’t deliberately caused to record past the end. It’s usually the previews that we miss, but it also affects the show proper in most cases.
“Synchronize your watches” is basically an urban legend, courtesy of old movies and TV. Utter nonsense! I’d be willing to bet that when they have synced up to the second, that by the time they need to refer back to their watches to do whatever they were supposed to at the exact second, their watches are already off-sync. They never show that, do they? In fact, they rarely do a follow-up to show that things happened right when they were timed to.