The UN General Assembly proclaimed 10 December as Human Rights Day in 1950, to bring to the attention ‘of the peoples of the world’ the Universal Declaration of Human Rights as the common standard of achievement for all peoples and all nations.
In 2013, the Office of the UN High Commissioner for Human Rights marks 20 years since its establishment.
http://www.un.org/en/events/humanrightsday/
http://at20.ohchr.org/timeline_full.html
