- 2024 - International Year of Camelids
- 2022 - International Year of Artisanal Fisheries and Aquaculture
- 2019 - International Year of Indigenous Languages, International Year of Moderation, International Year of the Periodic Table of Chemical Elements
- 2018 -
- 2017 - International Year of Sustainable Tourism for Development
- 2016 - International Year of Pulses
- 2015 - International Year of Light and Light-based Technologies, International Year of Soils (FAO)
- 2014 - International Year of Solidarity with the Palestinian People, International Year of Small Island Developing States, International Year of Crystallography, International Year of Family Farming
- 2013 - International Year of Water Cooperation, International Year of Quinoa
- 2012 - International Year of Cooperatives, International Year of Sustainable Energy for All
- 2011 - International Year for People of African Descent, International Year of Chemistry, International Year of Forests, International Year of Youth
- 2010 - International Year of Youth (12 August 2010 - 11 August 2011), International Year for the Rapprochement of Cultures, International Year of Biodiversity, International Year of the Seafarer
- 2009 - International Year of Reconciliation, International Year of Natural Fibers, International Year of Human Rights Learning, International Year of Astronomy, Year of the Gorilla (UNEP and UNESCO)
- 2008 - International Year of Planet Earth, International Year of Languages, International Year of Sanitation, International Year of the Potato
- 2007-2008 - International Polar Year (WMO)
- 2006 - International Year of Deserts and Desertification
- 2005 - International Year of Microcredit, International Year for Sport and Physical Education, International Year of Physics
- 2004 - International Year to Commemorate the Struggle against Slavery and its Abolition, International Year of Rice
- 2003 - Year of Kyrgyz Statehood, International Year of Freshwater
- 2002 - United Nations Year for Cultural Heritage, International Year of Mountains, International Year of Eco-tourism
- 2001 - United Nations Year of Dialog among Civilizations, International Year of Volunteers, International Year of Mobilization against Racism, Racial Discrimination, Xenophobia and Related Intolerance
- 2000 - International Year of Thanksgiving - (A/RES/52/16), International Year for the Culture of Peace
- 1999 - International Year of Older Persons
- 1998 - International Year of the Ocean
- 1996 - International Year for the Eradication of Poverty
- 1995 - United Nations Year for Tolerance, World Year of Peoples Commemoration of the Victims of the Second World War
- 1994 - International Year of the Family, International Year of Sport and the Olympic Ideal
- 1993 - International Year for the World's Indigenous People
- 1992 - International Space Year
- 1990 - International Literacy Year
- 1987 - International Year of Shelter for The Homeless
- 1986 - International Year of Peace
- 1985 - Year of the United Nations, International Youth Year: Participation, Development, Peace
- 1983 - World Communications Year; Development of Communication Infrastructures
- 1982 - International Year of Mobilization for Sanctions Against South Africa
- 1981 - International Year for Disabled Persons
- 1979 - International Year of The Child
- 1978 - 1979 - International Anti-Apartheid Year
- 1975 - International Women's Year
- 1974 - World Population Year
- 1971 - International Year for Action to Combat Racism and Racial Prejudice
- 1970 - International Education Year
- 1968 - International Year for Human Rights
- 1967 - International Tourist Year
- 1965 - International Co-operation Year
- 1961 - International Health and Medical Research Year
- 1959 - 1960 - World Refugee Year
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- 2015 - 2024 - International Decade for People of African Descent
- 2014 - 2024 - United Nations Decade of Sustainable Energy for All
- 2011 - 2020 - Third International Decade for the Eradication of Colonialism, United Nations Decade on Biodiversity, Decade of Action for Road Safety
- 2010 - 2020 - United Nations Decade for Deserts and the Fight against Desertification
- 2008 - 2017 - Second United Nations Decade for the Eradication of Poverty
- 2006 - 2016 - Decade of Recovery and Sustainable Development of the Affected Regions (3rd decade after the Chernobyl disaster)
- 2005 - 2015 - International Decade for Action, Water for Life
- 2005 - 2014 - United Nations Decade of Education for Sustainable Development, Second International Decade of the World's Indigenous People
- 2003 - 2012 - United Nations Literacy Decade: Education for All
- 2001 - 2010 - International Decade for a Culture of Peace and Non-violence for the Children of the World, Decade to Roll Back Malaria in Developing Countries, Particularly in Africa, Second International Decade for the Eradication of Colonialism
- 1997 - 2006 - Decade for The Eradication for Poverty
- 1995 - 2004 - Decade for Human Rights Education
- 1994 - 2004 - Decade of the World's Indigenous People
- 1993 - 2003 - Third Decade to Combat Racism and Racial Discrimination
- 1991 - 2000 - Second Industrial Development Decade for Africa, Second Transport and Communications Decade in Africa, United Nations Decade Against Drug Abuse, Fourth United Nations Development Decade
- 1990 - 2000 - International Decade for the Eradication of Colonialism
- 1990 - 1999 - United Nations Decade of International Law, International Decade for Natural Disaster Reduction
- 1990s - Third Disarmament Decade
- 1988 - 1997 - World Decade for Cultural Development
- 1983 - 1993 - Second Decade to Combat Racism and Racial Discrimination
- 1983 - 1992 - United Nations Decade for Disabled Persons
- 1981 - 1990 - International Drinking Water Supply and Sanitation Decade, Third United Nations Development Decade
- 1980 - 1990 - Second Disarmament Decade
- 1980's - Industrial Development Decade for Africa
- 1978 - 1988 - Transport and Communications Decade for Africa
- 1976 - 1985 - United Nations Decade for Women: Equality, Development and Peace
- 1973 - 1983 - Decade to Combat Racism and Racial Discrimination
- 1971 - 1980 - Second United Nations Development Decade
- 1970's - Disarmament Decade
- 1960 - 1970 - United Nations Development Decade
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