They had nothing to compare the clocks against, and I don’t think the stars and the sun would have made an useful target for comparison.
In: 17
Oh I see the question…
I think the problem started when long distance electronic communication became a thing
Before that, having the seconds exact was not really needed
With internet, it was necessary to sync different device at long distance down to the second
https://endruntechnologies.com/time-sync-history
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