Weights & Measures Day ― Date, History, and Details

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Let's dive deeper into learning more about the history of Weights & Measures Day and why people celebrate or observe it.
History of Weights & Measures Day and How to Celebrate/ Observe It
Weights and Measures Day is celebrated on May 20th each year. The day commemorates the signing of the Metre Convention in 1875. The Metre Convention established the International System of Units (SI), which is the modern version of the metric system. The SI is used by almost all countries in the world for trade, science, and medicine.
Weights and Measures Day is a reminder of the importance of accurate measurements. Inaccurate measurements can lead to errors in trade, science, and medicine. Weights and Measures Day is also a reminder of the need to calibrate and maintain measurement devices.
The SI was first proposed in 1790 by the French Academy of Sciences. The original proposal included six units: the metre, the kilogram, the second, the degree, the litre, and the gram. The SI has since been expanded to include seven base units: the metre, the kilogram, the second, the ampere, the kelvin, the mole, and the candela.
The SI is based on seven fundamental principles:
1. The international system of units is based on seven SI base units, which are the metre, the kilogram, the second, the ampere, the kelvin, the mole, and the candela.
2. These SI base units are chosen on the basis of their fundamental nature.
3. The SI base units are mutually independent.
4. The SI derived units are formed by combinations of the SI base units.
5. The SI derived units have names and symbols that are derived from the SI base units.
6. The SI derived units are used to express the magnitudes of physical quantities.
7. The SI units are used worldwide.