International Covenant on Economic, Social and Cultural Rights entered into force.

The International Covenant on Economic, Social and Cultural Rights (ICESCR) is a multilateral treaty adopted by the United Nations General Assembly (GA) on 16 December 1966 through GA. Resolution 2200A (XXI), and came in force from 3 January 1976. It commits its parties to work toward the granting of economic, social, and cultural rights (ESCR) to the Non-Self-Governing and Trust Territories and individuals, including labour rights and the right to health, the right to education, and the right to an adequate standard of living. As of July 2020, the Covenant has 171 parties. A further four countries, including the United States, have signed but not ratified the Covenant.

The ICESCR (and its Optional Protocol) is part of the International Bill of Human Rights, along with the Universal Declaration of Human Rights (UDHR) and the International Covenant on Civil and Political Rights (ICCPR), including the latter's first and second Optional Protocols.The Covenant is monitored by the UN Committee on Economic, Social and Cultural Rights.