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. (...)

The article:
http://www.hrea.org/index.php?&doc_id=1511

More about:

https://www.un.org/en/events/socialjusticeday/

http://www.ilo.org/global/about-the-ilo/who-we-are/ilo-director-general/statements-and-speeches/WCMS_235779/lang--en/index.htm

Basic Information:

http://en.wikipedia.org/wiki/World_Day_of_Social_Justice

http://es.wikipedia.org/wiki/D%C3%ADa_Mundial_de_la_Justicia_Social