On March 8, 1908, 15,000 working women garment workers marched on New York City’s Lower East Side to demand better hours and pay, an act that many point to as the birth of International Women’s Day (though that particular date was not set until 1913). In 1978, Sonoma County decided to expand International Women’s Day to Women’s History Week. The idea spread and, by 1987, Congress expanded the celebration to one month, declaring March Women’s History Month.