In the United States, Women's History Month traces its beginnings back to the first International Women's Day in 1911. In 1978, the school district of Sonoma, California participated in Women's History Week, an event designed around the week of March 8 (International Women's Day). In 1979, a fifteen-day conference about women's history was held at Sarah Lawrence College from July 13 until July 29, chaired by historian Gerda Lerner. It was co-sponsored by Sarah Lawrence College, the Women's Action Alliance, and the Smithsonian Institution. When its participants learned about the success of the Sonoma County's Women's History Week celebration, they decided to initiate similar celebrations within their own organizations, communities, and school districts. They also agreed to support an effort to secure a National Women's History Week. In 1987, after being petitioned by the National Women's History Project, Congress passed Pub. L. 100-9 which designated the month of March 1987 as Women's History Month. Between 1988 and 1994, Congress passed additional resolutions requesting and authorizing the President to proclaim March of each year as Women's History Month.