18. What do you mean green which mean
time
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Copy link. About sharing. Greenwich Mean Time (GMT) is the time measured on the Earth's zero degree line of longitude, or meridian. This runs from the North Pole to the South Pole, passing through the Old Royal Observatory in the London suburb of Greenwich
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Greenwich Mean Time or GMT is clock time at the Royal Observatory in Greenwich, London. ... The Greenwich Meridian (Prime Meridian or 0° Degrees Longitude) marks the starting point of every Time Zone of the time zone map.
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