We celebrate World Metrology Day every year on May 20 to highlight the importance of metrology and its role in our daily lives. The beginning was made in 1875, when the Meter Convention was signed. The Convention is an international treaty that ensures uniformity of metrological standards in different countries. In accordance with it, the International Bureau of Weights and Measures (BIPM) and the International Committee of Weights and Measures (CIPM) were established and General Conferences of Weights and Measures (CGPM) were convened. These international organizations are called upon to solve standardization issues in the field of metrology.

Metrology (from Greek: μέτρον + λόγος – measure + reason, cause) is an integral part of everyday life and is applied in all fields – science, economy, transport, healthcare, safety, technology, etc. In this regard, the World Day of Metrology is important not only for professionals in the field, but also for the general public. Marking of this day reminds us of the great importance of accuracy and validity in measurements, both in the scientific field and in the field of standards, to ensure accuracy, and reliability. From this point of view, metrology has an essential role in various processes, including facilitating international trade, economic growth, safety, sustainable development of the world, etc.

World Metrology Day is a day to promote knowledge and understanding of the importance of metrology in our daily lives, and celebrating it is an act of recognition of the hard work of metrologists around the world.

Each year, the Day is focused on different aspects of metrology (e.g., "Metrology for Health", "Metrology for Energy", "Metrology for Connectivity", etc.) which draw attention to certain topics in the field of measurements. In 2023 the theme is entitled "Measurements supporting the global food system". This year's theme was chosen because of the growing challenges of climate change and global food distribution in a world whose population will reach 8 billion at the end of 2022.

Metrological accuracy and traceability of measurement results is essential, both for the standardization of various products and services, and for increasing the quality of products, optimizing costs and reducing the risk of misleading the user and errors. Metrological traceability of measurement results is an integral part of the requirements of international standards (e.g., ISO 9001, ISO 14001, ISO 22000, ISO/IEC 17020, ISO/IEC 17025, etc.). These standards are used by organizations and competent authorities worldwide.

Celebrating World Metrology Day reminds us of the importance of metrology and its application in various areas of our lives. The original purpose of the Meter Convention – the worldwide standardization of measurements – remains as important today as it was back in 1875.
 
More information can be found on the official worldmetrologyday page