World Metrology Day
From Wikipedia - Reading time: 4 min
World Metrology Day is an event occurring on 20 May celebrating the International System of Units. The date is the anniversary of the signing of the Metre Convention in 1875.[1] Metrology is the study of measurement. The World Metrology Day project is currently realized jointly by the BIPM and the OIML.
2019
[edit]The 2019 Metrology Day is when the changes to the International System that were decided on in 2018 come into effect,[2] among them the replacement of the International Prototype of the Kilogram with a redefinition based on the Planck constant.
2023
[edit]World Metrology Day adopted as one of UNESCO international days.[3]
See also
[edit]References
[edit]- ^ "Australia's measurement system". 20 May 2019.
- ^ Grant, Andrew (2018). "Revamped SI measurement system approved". Physics Today (11): 5005. Bibcode:2018PhT..2018k5005G. doi:10.1063/PT.6.2.20181116a. S2CID 239775130.
- ^ "2023-11-21-wmd-unesco-adoption". BIPM. Retrieved 20 May 2025.
External links
[edit]- WorldMetrologyDay.org – official website
 | This standards- or measurement-related article is a stub. You can help Wikipedia by expanding it. |
Licensed under CC BY-SA 3.0 | Source: https://en.wikipedia.org/wiki/World_Metrology_Day20 views | Status: cached on August 11 2025 03:50:39↧ Download as ZWI file
EncycloReader
is supported by the 
KSF