According to the Center for Women’s Global Leadership:

The 16 Days of Activism against Gender Violence (25 November – 10 December) is an annual campaign that is symbolic of the global women’s movement and end-violence networks. Its starting day, 25 November, is observed each year to honour the Mirabal sisters, three political activists from the Dominican Republic who were assassinated on the same date in 1961. The end of the 16 Days is marked by 10 December, International Human Rights Day.

You can read more here. And you can say NO to violence against women at Unifem and we can unite to end violence against women.

(Hat tip to Feminist Philosophers).