March is National Women’s History Month, but since women are pretty historic year-round, it begs the question: Why March? Is this month significant to women’s history, or is it just an arbitrary month on the calendar?

The answer involves a little bit of history and a little bit of coincidence.
From day to week to month
Women’s History Month, which is observed in the US, UK and Australia in March, and in October in Canada, began with a single day. International Women’s Day is March 8, and it has been observed in some shape or form since 1911. It was officially commemorated by the United Nations in 1975 and was officially recognized by the UN two years later.

In the 1970’s, local groups and municipalities began celebrating Women’s History Week. According to the National Women’s History Museum, one of the most notable celebrations was organized in Santa Rosa, California, by the Education Task Force of the Sonoma County Commission on the Status of Women in 1978.
Women in Australia participate in a rally for International Women’s Day on March 8, 2017.
Women in Australia participate in a rally for International Women’s Day on March 8, 2017.
The movement was so popular, people began lobbying for a more formal observance, and in 1980, President Jimmy Carter designated the first official National Women’s History Week, beginning on March 8 of that year.
Schools, universities and local governments came to realize that this period of time allowed them to not only celebrate the achievements of women, but look critically at equality and opportunities for women, and educate people on women’s history. It was only a matter of time before the week became a month.
According to the National Women’s History Alliance, states began declaring the whole month of March as Women’s History Month all the way up until 1986, when a more national push finally made headway. The following year, Congress declared March 1987 as the first official Women’s History Month.

Besides International Women’s Day, March holds a few more important milestones for women’s history:

Title IX, which prohibits sex discrimination in all federally funded education programs, was passed by the Senate on March 1, 1972. It became law later that year. In fact, the educators who formed the first Women’s History Week a few years later did so to help schools comply with Title IX regulations.
The Equal Rights Amendment, a constitutional amendment which guarantees rights regardless of sex past those assured by the 19th Amendment, passed the Senate on March 22, 1972. (P.S. — it’s still not fully ratified.)
Earlier in the 20th century, two significant women’s suffrage events took place in March. The first major suffragist parade took over Washington, DC, on March 3, 1913, and the National Woman’s Party, a political group dedicated to women’s suffrage, was officially formed in March 1917.
Also, it might be a coincidence, but seeing as how demonstrations and public displays were an integral part of the women’s suffrage movement, the month of “March” certainly seems to fit.