The Sotoan Union wrote:Farnhamia wrote:What do you mean? How does setting the clock forward and then back keep us in synch with the planet's rotation?
Setting the clock forward and back keeps it so our waking hours have more daylight in them. Without it our time would eventually not correspond to daylight at all.
You're thinking of leap seconds.
It would take tens of thousands of years for the clock to get completely opposite to the daytime, without leap seconds. We could have basically ignored this problem for a thousand years, and the sun would only be coming up 20 minutes earlier by the clock. I think it's more that astronomers use time (right ascension) to specify the co-ordinates of celestial bodies so they wanted it corrected each year.
Even that wouldn't be a good reason to introduce leap seconds NOW. Computers could easily adjust celestial co-ordinates on the fly. But we have the leap seconds and they don't bother anyone. Your watch (phone, etc) may be wrong by one or perhaps more seconds on July 1 each year, until such time as it checks in with an internet time server and corrects itself.