SI Redefinition Day

Frequency:
Every
May 20
Inception Year:
2019
Hashtags:
References:
itc.gov.hk/…/the_redefinition_of_si_units_and_its_impact.html
physicsworld.com/…/kilogram-finally-redefined-as-worlds-metrolog…

SI Redefinition Day happens annually on the 20th of the month of May.

Don't Miss a Day

Receive daily notifications of holidays and observances. Never miss out on a fun national day again!