When Every Town Kept Its Own Time
Imagine a country where nearly every town had a different time. For much of history, that was normal. People set their clocks by the sun, and noon came when the sun stood highest in the sky. Because the sun reaches that point earlier in the east and later in the west, a town just a few miles away could be a few minutes ahead or behind its neighbor.
For farmers and shopkeepers, this hardly mattered. Travel was slow, so no one noticed small differences. The railroads changed everything. A train could cross many towns in a single afternoon, and each town's clocks disagreed. Timetables became confusing, and a traveler could miss a connection or worry about a collision of schedules. Some railroad companies kept their own time and printed several different times in a single timetable.
The solution came from the railroads themselves. On November 18, 1883, the major railroads in the United States and Canada began using standard time. The continent was divided into time zones, and all the clocks inside a zone showed the same hour. Many cities soon agreed, because a shared time made life simpler.
Some towns objected at first, since they preferred their own local noon. Years passed before standard time became national law in the United States, in 1918. Still, the change shows how a new invention can force people to change habits. Every time you check a clock, you use an idea that railroads helped to make ordinary.