The White Ribbon Campaign (WRC) appeared in 1991 in relation to this movement and became one of the largest men's anti-violence programs in the world. Started by activists, such as Michael Kaufman and Toronto politicians like the late New Democratic Party leader Jack Layton, it has now spread to over 57 countries around the world. It is now an international effort of men and boys working to end violence against women. Its basic principle is the importance of men and boys speaking out against all forms of violence against women. For that purpose, members of the WRC offer a variety of presentations and workshops on violence. In Canada, the campaign is run from November 25 (the International Day for the Eradication of Violence Against Women) until December 6, Canada's National Day of Remembrance and Action on Violence Against Women. Other countries support 16 Days of Activism from November 25 until December 10 but campaigns can occur at any time of the year.