World Time Zones
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The current GMT (Greenwich Mean Time) in Greenwich, England, is shown directly below this map, and that time zone is indicated with a O (in the olive green square) at the bottom of the map. Greenwich is indicated with a white dot.
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The numbers shown in each time zone (left or right) of GMT indicate the number of hours you should add or subtract to find the current time in your area of interest.
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As an example, note that California, on the western coast of the United States, is indicated as being -8. To easily determine the current time in California, simply subtract 8 hours from the GMT time shown directly below.