On 8 December 2023, the United Nations General Assembly, in its seventy-eighth session, unanimously adopted resolution 78/122 “World Cleanup Day”, which proclaims 20 September as World Cleanup Day. 

The resolution invites all Member States, organizations of the United Nations system, other international and regional organizations, and other relevant stakeholders – including civil society, the private sector and academia – to observe World Cleanup Day through activities aimed at raising awareness of the role clean-up efforts play in sustainable development. The United Nations Human Settlements Programme (UN-Habitat) facilitates the observance of the Day.