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There are 24 time-zones around the planet. Measured from Greenwich (near London) in England - they ensure the whole planet lives, sleeps and works relative to the hours of daylight we have.

Greenwich Mean Time (now called Universal Time Constant or UTC) is the time zone for the UK, and the standard by which all other time zones around the planet are relative to. There are four time zones in america - Pacific, Central, Mountain & Eastern

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12y ago

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