The UNESCO General Conference held from 7 to 22 November 2023 adopted 20 May as a UNESCO International Day, following the proposal presented by Kazakhstan and supported by 43 additional nations, alongside the BIPM and the OIML.

The declaration of World Metrology Day by UNESCO, to be observed annually on 20 May, will significantly enhance global awareness of metrology's role in everyday life and will enhance BIPM’s actions in capacity-building with developing economies.

The BIPM expresses its sincere thanks to Ambassador Gulsara Arystankulova and the Permanent Delegation of the Republic of Kazakhstan to UNESCO as the main sponsor of the World Metrology Day proposal, as well as the 43 UNESCO Member States who have given their written support following decision 41 at the 215th Executive Board meeting in 2022.

From left to right:
His Excellency Ambassador Askar Abdrakhmanov (Permanent Delegation of the Republic of Kazakhstan to UNESCO in Paris), Dr Martin Milton (Director, BIPM), Ms Rahima Guliyeva (Institutional liaison and membership, BIPM).