How Do Countries Decide on Time Zones?

Imagine the whole world is like a big pizza, and each slice has its own clock. Some countries are on one slice, but others get two or even three slices, that's why they have different time zones! It all started because people wanted to match their local sun times with clocks, so it was easier for them to live and work.

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Examples

A child in Brazil goes to bed as a friend in Peru is just waking up.
An airplane travels from New York to London, and passengers lose or gain hours during the trip.
India has one time zone even though it spans over 30 degrees of longitude.

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Categories: History · time zones,geography,history of timekeeping