National Women's History Museum - NWHM. Women's History Month — History.com Articles, Video, Pictures and Facts. Women’s History Month is a celebration of women’s contributions to history, culture and society and has been observed annually in the month of March in the United States since 1987. Women’s History Month 2021 will take place from Monday, March 1-Wednesday, March 31, 2021. Why Do We Celebrate Women’s History Month? Women’s History Month is a dedicated month to reflect on the often-overlooked contributions of women to United States history. American Women Through Time.