The United Nations' (UN) World Day of Social Justice is annually observed on February 20 to encourage people to look at how social justice affects poverty eradication. It also promotes full employment and decent work, gender equity and access to social well-being and social justice for all. 

Social justice is an underlying principle for peaceful and prosperous coexistence within and among nations. We uphold the principles of social justice when we promote gender equality or the rights of indigenous peoples and migrants. We advance social justice when we remove barriers that people face because of gender, age, race, ethnicity, religion, culture or disability.

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