The U.S. Census Bureau is highlighting Women’s History Month in March, noting that its origin dates back to March 8, 1857, when hundreds of women working in New York City’s garment and textile factories protested poor workplace conditions. In 1909, New York City hosted the country’s first Women’s Day celebration after 15,000 women marched to demand shorter hours, higher wages, voting rights and an end to child labor. Congress designated the second week of March as Women’s History Week in 1981 and expanded the commemoration to encompass the entire month six years later. The number of women in the U.S. is 172 million, compared to 168 million men.

