20 May 2018: World Metrology Day

The theme for World Metrology Day 2018 is Constant evolution of the International System of Units. This theme was chosen because in November 2018, the General Conference on Weights and Measures is expected to agree one of the largest changes to the International System of Units (the SI) since its inception.

More info: http://www.worldmetrologyday.org/?platform=hootsuite