Rosie the Riveter Day is an observation honoring the hard work and sacrifices American women made in the workplace during World War Two.

During this time, women across the nation traded their pre-war activities for work in factories, electronics, welding facilities and many other industries supporting the American war effort. Some five million civilian women took over what used to be thought of stereotypically as “man’s work,” joining some 350,000 women who served during World War Two in uniform.