was observed in the United States on Feb. 27, 1909. The day went on to gain recognition across the globe and was celebrated in many countries for several years before eventually losing steam.Then, in the early 2000s, the movement behind International Women’s Day was re-ignited.
The 100th anniversary of the first celebration - which happened in 1911 in Austria, Denmark, Germany and Switzerland - was celebrated in 2011.
Also during that year, then-President Barack Obama proclaimed March 2011 to be "Women's History Month."RELATED: Celebrate Women’s History Month with female-centric films, documentaries and directorsIn years past, massive marches and events have taken place in cities across the country to mark the occasion.