They can have my wristwatch when they take it off my cold, dead wrist.
OK, maybe that’s going a bit far.
I’m finding, as I get older, that the novelty of the cell phone has worn off. Really, I only use it for emergencies and/or work. We’ve considered replacing the landline with cell, but our DSL runs through those landline wires, so I’m not sure if that’s a great idea in the long run.
Reason I mention the cell is that it’s the only clock I can trust besides my wrist watch and the one on my PC (we sync our network to the fed time servers, and since I manage that, I know it’s correct).
I have found that most “public” clocks, if they are working at all, are off by about 15 minutes in either direction, on average.
In the small company I work for, we have a bunch of cheap battery-powered wall clocks. They are constantly drifting. The phone system has a clock, but it doesn’t have the capacity to sync to a time server, so it drifts too. Every other device with a clock has the same problem and keeping them all in sync isn’t a priority.
My wristwatch is always there, and I keep it set to the correct time. I think of it as time self reliance.