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Weights & Measures

1959
The US federal government mandated that everyone use the international foot but allowed surveyors to keep to the old US survey foot for a while. That temporary reprieve has lasted 60 years, but it will finally end in 2022. The international foot is the smaller one — adding about an eighth of an inch of difference when measuring a mile.
Links: USA, Weights & Measures     Click to see the source(s) for this event 
 
2018 Nov 16
Meeting in Versailles, France, 50-plus nations unanimously approved a ground-breaking overhaul to the international system of measurements that underpins global trade and other vital human endeavors, uniting together behind new scientific definitions for the kilogram and other units in a way that they have failed to do on so many other issues.
Links: France, Weights & Measures     Click to see the source(s) for this event 
 



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