Warsaw meridian

Warsaw meridian

The Warsaw meridian ( _pl. południk warszawski) is a meridian line running through Warsaw. The local mean time at the meridian was known as Warsaw mean time, and was, since early nineteenth century, commonly used for timekeeping purposes in the lands of the former Polish-Lithuanian Commonwealth.

On 5 August 1915, Warsaw switched to the Central European Time, and the rest of Poland quickly followed suit. Officially, the standard time was introduced in Poland on 1 June 1922.

In 1880, a small column marking the meridian was erected at the Theatre Square in Warsaw. It is marked as located at 52°14’40”N 21°00’42”E (in accordance with the coordinate system used at that time).


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