World Metrology Day - May 20 in History | This Day Story

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May 20,

World Metrology Day

World Metrology Day

World Metrology Day is an event occurring on 20 May celebrating the International System of Units. The date is the anniversary of the signing of the Metre Convention in 1875. Metrology is the study of measurement. The World Metrology Day project is currently realized jointly by the BIPM and the OIML.

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