Women's History Month is celebrated in the United States, the United Kingdom, and Australia, with its origins dating back to 1911 when the first International Women's Day was held. In 1978, it began as a week-long commemoration in Sonoma County, California, before becoming a national week in 1980 and a month-long celebration every March in 1987. Companies like LaunchDarkly have been celebrating Women's History Month by giving back to organizations supporting women, sharing personal experiences of being a mom in tech, hosting virtual movie nights featuring films about women, promoting diverse reading lists, and recognizing their own female employees.