UN International Decades
- 2021–2030 – United Nations Decade on Ecosystem Restoration (A/RES/73/284)
- 2021–2030 – International Decade of Ocean Science for Sustainable Development (A/RES/72/73)
- 2019–2028 – Nelson Mandela Decade of Peace (A/RES/73/1) & United Nations Decade of Family Farming (A/RES/72/239)
- 2018–2028 – International Decade for Action “Water for Sustainable Development” (A/RES/71/222)
- 2018-2027 – Third United Nations Decade for the Eradication of Poverty (A/RES/72/233)
- 2016–2025 – United Nations Decade of Action on Nutrition (A/RES/70/259) and Third Industrial Development Decade for Africa (A/RES/70/293)
- 2015–2024 – International Decade for People of African Descent (A/RES/68/237)
- 2014–2024 – United Nations Decade of Sustainable Energy for All (A/RES/67/215)
- 2011–2020 – Third International Decade for the Eradication of Colonialism (A/RES/65/119) – United Nations Decade on Biodiversity (A/RES/65/161) – Decade of Action for Road Safety (A/RES/64/255)
- 2010–2020 – United Nations Decade for Deserts and the Fight against Desertification (A/RES/62/195)
UN International Years
2024
- International Year of Camelids (A/RES/72/210)
2022
- International Year of Artisanal Fisheries and Aquaculture (A/RES/72/72)
- International Year of Basic Sciences for Sustainable Development (adopted by UNESCO, still to be adopted by UNGA)
2020
- International Year of Plant Health (A/RES/73/252)
2019
- International Year of Indigenous Languages (A/RES/71/178)
- International Year of Moderation (A/RES/72/129)
- International Year of the Periodic Table of Chemical Elements (A/RES/72/228)
UN International Weeks
- 4–10 October: World Space Week (A/RES/54/68)
- 6–12 November (the week in which 11 November falls): International Week of Science and Peace (A/RES/43/61)
UN International Days
- 24 January – International Day of Education (A/RES/73/25)
- 11 February – International Day of Women and Girls in Science (A/RES/70/212)
- 4 March – World Engineering Day for Sustainable Development
- 8 March – International Women’s Day
- 21 March – International Day of Forests (A/RES/67/200)
- 22 March – World Water Day (A/RES/47/193)
- 23 March – World Meteorological Day (WMO/EC-XII/Res.6)
- 7 April – World Health Day (WHA/A.2/Res.35)
- 12 April – International Day of Human Space Flight (A/RES/65/271)
- 25 April – International Girls in ICT Day
- 16 May – International Day of Light (UNESCO 39 C/Resolution 16)
- 17 May – World Telecommunication and Information Society Day (A/RES/60/252; ITU Resolution 68/2006)
- 22 May – International Day for Biological Diversity (A/RES/55/201)
- 5 June – World Environment Day (A/RES/2994 (XXVII))
- 8 June – World Oceans Day (A/RES/63/111)
- 17 June – World Day to Combat Desertification and Drought (A/RES/49/115)
- 20 June – World Refugee Day (A/RES/55/76)
- 16 September – International Day for the Preservation of the Ozone Layer (A/RES/49/114)
- 6 October (first Monday in October) – World Habitat Day (A/RES/40/202 A)
- 11 October – International Day of the Girl Child (A/RES/66/170)
- 13 October – International Day for Disaster Reduction (A/RES/64/200)
- 24 October – United Nations Day (A/RES/168 (II); A/RES/2782 (XXVI))
- 31 October – World Cities Day (A/RES/68/239)
- 5 November – World Tsunami Awareness Day (A/RES/70/203)
- 10 November – World Science Day for Peace and Development (UNESCO 31 C/Resolution 20)
- 19 November (third Thursday in November) – World Philosophy Day (UNESCO 33 C/Resolution 37)
- 5 December – World Soil Day (A/RES/68/232)