I guess I always thought people in Washington must have gotten together and decided it should be 9:00 in New York, 8:00 in Chicago, 7:00 in Denver, and 6:00 in San Francisco.

I should have known it was the railroads.

The story of the day (standard) time began, November 13, 1883 — and how it made immigration law possible, this week in How We Got Here, on Substack.

https://alisonpeck.substack.com/p/the-day-time-began