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About National Prime Meridian Day
Technology & Telecom , Environment Space & The Outdoors
United States
Ends: Nov 01, 2021
DESCRIPTION:
Prime Meridian Day marks the creation of modern time zones and longitude measurements at the International Meridian Conference in Washington DC in October 1884. November 1 is when the new measurements went into affect.
The prime meridian resulted in the creation of the Greenwich Meridian marking zero degrees longitude.
A prime meridian was necessary because of two things: for navigation and to unify timetables to create the 24 longitude based time zones of the world. The earth travels turns on its access at 15 degrees per hour. Each time zone in the world covers 15 degrees, counting forward from the Greenwich Meridian off the coast of Britain in the Atlantic.
The International Date Line, which is different and located in the Pacific, affords for three additional time zones. This is why some countries are at :30 minute rather than :60 minute increments.
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