American and Canadian railroads enacted time zones — a concept that schedules ... the website of California cartographer GeoJango Maps. "It was decided that Greenwich, England, would act as ...

A Tribune map from 1883 shows how railroads ... the article was something else I learned: America was divided into its (mostly accepted) time zones in Chicago. Which makes sense.

accurate map showing the nation’s time zones and local observance of Daylight Saving Time. Federal transportation officials are now at work creating an accurate map of the nation’s time zones ...