I’m sure I haven’t asked the question correctly, but if all the clocks in the world are aligned, when did we start it? How did the entire world agree that midnight is midnight and any second behind or ahead is out of line?
In: 10
Have a look at Greenwich Mean Time and Paris Meridian Time. Both were contenders for a base time for which other countries (who needed to have a united timezone due to railways and colonisation in general) would be a certain number of hours ahead of behind. Having an international date line over the relatively uninhabited central Pacific worked in both cases.
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