16 days of activism against gender-based violence is an international campaign to challenge violence against women and girls. The campaign is celebrated every 25 November to 10 December. The international campaign originated from the first Women’s Global Leadership Institute coordinated by the Center for Women’s Global Leadership in 1991. The campaign begins every year on the International Day for the Elimination of Violence Against Women which was endorsed by the United Nations Resolution 54/134 December 17, 1999. According to global statistics, “more than one in three women have experienced violence— that's 700 million women, or close to the total population of sub-Saharan Africa. The vast majority of this violence is committed by their husbands or male partners”. Currently, more than 3,700 organizations from approximately 164 countries participate in the campaign annually.