How Railways Set the Clocks

Written by Studio AM.

Before standard time became common, each town kept its own time, often based on the Sun. Local noon occurred when the Sun reached its highest point in the sky. Places at different longitudes therefore showed different local times. Slow journeys made small differences less noticeable.

The railway changed that. Printed timetables needed a clear time reference across stations. If clocks disagreed, passengers could misunderstand departures and staff could face confusion when coordinating trains, especially on shared tracks.

To solve the problem, railway companies began using common reference times. In Britain, many companies adopted Greenwich Mean Time during the 1840s. Greenwich time became the legal standard in Britain in 1880. Other countries developed their own arrangements, and time zones later helped coordinate larger regions.

What began partly as a convenience for trains became useful for many other activities. Standard time replaces separate local clock readings with an agreed reference, making schedules easier to compare across places.

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  1. Question 1 of 4

    The passage mainly explains

  2. Question 2 of 4

    How was local noon commonly identified before standard time?

  3. Question 3 of 4

    The passage suggests that standard time was adopted mainly because it was

  4. Question 4 of 4

    In this passage, 'adopted' most nearly means

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