Commonwealth Day
noun
a holiday observed in some countries of the Commonwealth of Nations, originally on May 24, the anniversary of Queen Victoria's birth, but now on varying dates.
Formerly
Empire Day.
Origin of Commonwealth Day
First recorded in 1955–60
British Dictionary definitions for commonwealth day
Commonwealth Day
noun
the anniversary of Queen Victoria's birth, May 24, celebrated (now on the second Monday in March) as a holiday in many parts of the Commonwealth
Former name: Empire Day