The Demise of God's Time

In the shadow of the recent time shifts we should note that it was the railroads that killed "God's time". Until people could move fast enough across the country that the difference between local noon and noon on a portable timepiece was noticeable only mariners appreciated how the zenith varied with longitude. It was tho railroads that established formal time zones so that clocks were uniform across a range of longitudes. In doing so genuine local time disappeared.