Women's History Month started as a week in 1982. But by 1987 the month of March became Women's History Month. March 8 is also International Women's day. It was first observed in 1909 but by 1977 it was celebrated around the world and recognized by the UN. Since 1996 the UN has had themes for women's rights and this year's theme is Empowering Women, Empowering Humanity: Picture It! Social media pages use #Make It Happen to celebrate the day.