| 26 January | International Day of Clean Energy |
| 2 February | World Wetlands Day |
| 1 March | World Seagrass Day |
| 3 March | World Wildlife Day |
| 8 March | International Women’s Day |
| 21 March | International Day of Forests |
| 22 March | World Water Day |
| 30 March | International Day of Zero Waste |
| 22 April | International Mother Earth Day |
| 2 May | World Tuna Day |
| 11 May | World Migratory Bird Day |
| 20 May | World Bee Day |
| 22 May | International Day for Biological Diversity |
| 5 June | World Environment Day |
| 8 June | World Oceans Day |
| 7 September | International Day of Clean Air for Blue Skies |
| 20 September | World Cleanup Day |
| 27 September | World Tourism Day |
| 29 September | International Day of Awareness on Food Loss and Waste Reduction |
| first Monday, October | World Habitat Day |
| 31 October | World Cities Day |
Two years, no agreement on plastics: Where to from here? The Local and Subnational Government Coalition asks after INC-5
Held from 25 November to 1 December 2024, in Busan, Republic of Korea, the fifth session of the Intergovernmental Negotiating Committee on Plastic Pollution (INC-5)
