| 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 |
Media Release: Local and subnational Governments Coalition to end Plastic Pollution
Local Governments for Sustainability, the Gouvernement du Québec, the Government of Catalonia, UCLG and Partners officially launched the Global Coalition of Local and Subnational Governments
