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Why there’d be no time zones without trains

Name: How do time zones work and what are they based on?
Uploaded: 2018-03-07T20:39:17.000Z
Duration: 2 min 41 s
Description: What are time zones? Before watches, smartphones, and Siri, we used to tell time by the Sun, but that changed about 100 years ago when time zones were first introduced.

What are time zones? Before watches, smartphones, and Siri, we used to tell time by the Sun, but that changed about 100 years ago when time zones were first introduced.