GMT (Greenwich Mean Time) is also referred to as Zone Time/ “Zulu Time” by pilots and seafarers. By sticking with Zulu Time, it is easy to convert to “local time” once arriving to your destination by adding or subtracting from the GMT/ UTC time depending on if you are east (add) or west (subtract) of the Prime Meridian (which runs through Greenwich, England) until reaching the International Date Line which begins up near the Bering Strait between Alaska and Russia and zigzags down to the South Pole . For example if it is 18:00 Zulu time and you are in the Pacific Time Zone (UTC -8) you subtract 8 hours from the Zulu Time (10:00). So with that, you know it is 6PM in London England and 10AM in Seattle, WA.
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