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World Metrology Day - 20 May.

# World Metrology Day: 20 May\

# World Metrology Day - 20 May.
The World Metrology Day is observed every year on 20th May. World Metrology Day is an annual celebration of the signature of the Metre Convention on 20 May 1875 by representatives of seventeen nations.

The theme for World Metrology Day 2020 is "Measurements for global trade".

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