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World Metrology Day celebrates the signature by representatives of seventeen nations of the Metre Convention on 20 May 1875. The Convention set the framework for global collaboration in the science of measurement and in its industrial, commercial and societal application. The original aim of the Metre Convention - the worldwide uniformity of measurement - remains as important today as it was in 1875.

The World Metrology Day (WMD) project is realized jointly by the BIPM (International Bureau of Weights and Measures) and the OIML (International Organization of Legal Metrology) and the theme for 2013 is "Measurements in daily life." The event aims to show how many measurements come into play in the course of a typical day, whether checking the time, purchasing food or produce, filling up a vehicle with fuel, or undergoing a blood pressure check. The WMD shall draw attention to the impact of the measurements that we as citizens come across in our daily lives.