International Meridian Conference

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The International Meridian Conference was a conference held in October 1884 in Washington, D.C., in the United States to determine the Prime Meridian of the world. The conference was held at the request of U.S. President Chester A. Arthur.



Twenty-five nations, represented by 41 delegates, participated in the conference:


The following resolutions were adopted by the conference:

Resolution 2, fixing the meridian at Greenwich, was passed 22–1 (San Domingo, now the Dominican Republic, voted against); France and Brazil abstained. The French did not adopt the Greenwich meridian until 1911.[1]

Resolution 4 expressly exempts standard time from the universal day. Although two delegates, including Sandford Fleming, proposed the adoption of standard time by all nations, other delegates objected, stating that it was outside the purview of the conference, so neither proposal was subjected to a vote. Thus the conference did not adopt any time zones, contrary to popular belief.

Regarding resolution 6: Great Britain had already shifted the beginning of the nautical day from noon, twelve hours before midnight, to midnight in 1805, during the Battle of Trafalgar. The astronomical day was shifted from noon, twelve hours after midnight, to midnight effective 1 January 1925 by a resolution of the newly formed International Astronomical Union.

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