20 February - World Day of Social Justice

Social justice and human rights are fundamentally linked. Social development and social justice are indispensable for the achievement and maintenance of peace and security within and among nations and cannot be attained in the absence of respect for all human rights and fundamental freedoms. (...)
In 2007, the United Nations General Assembly proclaimed 20 February as the World Day of Social Justice. Every year, governments are invited to commemorate the day through national activities supporting the efforts of the international community to eradicate poverty, promote full employment and decent work, achieve gender equity and provide access to social well-being and justice for all. (...)

The article:

From the UNDESA website:

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Amnesty International’s Demand Dignity campaign: