For the United Nations, the pursuit of social justice for all is at the core of our global mission to promote development and human dignity. The adoption by the International Labour Organization of the Declaration on Social Justice for a Fair Globalization is just one recent example of the UN system’s commitment to social justice. The Declaration focuses on guaranteeing fair outcomes for all through employment, social protection, social dialogue, and fundamental principles and rights at work.
The General Assembly proclaimed 20 February as World Day of Social Justice in 2007, inviting Member States to devote the day to promoting national activities in accordance with the objectives and goals of the World Summit for Social Development and the twenty-fourth session of the General Assembly. Observance of World Day of Social Justice should support efforts of the international community in poverty eradication, the promotion of full employment and decent work, gender equity and access to social well-being and justice for all.

Link: : http://www.un.org/en/events/socialjusticeday/