The United Nations Day for South-South Cooperation falls on 12 September; the UN's 2026 high-level observance was held a day earlier, on 11 September, at UN Headquarters in New York.
The 2026 theme is "Solidarity Rising: Global Alliance for Inclusive and Innovative Development".
The observance launched the Global Alliance for South-South and Triangular Cooperation, a voluntary, UN-facilitated platform convened by the UN Office for South-South Cooperation (UNOSSC).
The date marks the adoption of the Buenos Aires Plan of Action (BAPA) on 12 September 1978.
UN unit for technical cooperation among developing countries created - today's UNOSSC
Buenos Aires Plan of Action adopted at the UN Conference on Technical Cooperation among Developing Countries
UNGA first declares a UN Day for South-South Cooperation, on 19 December
UNGA moves the day to 12 September
India-UN Development Partnership Fund set up, managed by UNOSSC
Global Alliance for South-South and Triangular Cooperation launched at UN Headquarters
Promotes, coordinates and supports South-South and triangular cooperation globally and within the UN system; convener of the new Global Alliance
Support Southern-owned, demand-driven sustainable development projects in the developing world, with a focus on least developed countries and small island developing States
Key: US$150 million fund set up in 2017, led by the Government of India and managed by UNOSSC; has supported 76 projects in 54 countries
GS Paper 2 > International institutions; India and the Global South
1978 UN framework for technical cooperation among developing countries; its adoption date fixes the UN day
Southern-led cooperation between developing countries supported by a developed country or multilateral body