The theme for the World Metrology Day (WMD) 2021 - as always on 20 May - is in this year: Measurement for Health. From the website of the WMD: "This theme was chosen to create awareness of the important role measurement plays in health, and thus in the wellbeing of every one of us. Indeed more widely metrology, the science of measurement, plays a central role in scientific discovery and innovation, industrial manufacturing and international trade, in improving the quality of life and in protecting the global environment." Read more on www.worldmetrologyday.org.