• 1. International day (Global) | 24 Jan 25 | International Day of Education
• 2. International day (Global) | 26 Jan 25 | International Day of Clean Energy
• 3. Conference (Global) | 27 Jan 25 to 29 Jan 25 | Cleantech Forum North America | San Diego, US | In-person event by Cleantech Group
• 4. Policy event (Global) | 30 Jan 25 | ECOSOC Partnership Forum | New York, US | In-person event by UN

• 5. Conference (Global) | 10 Feb 25 to 12 Feb 25 | Greenbiz | Phoenix, US | In-person event by GreenBiz Group
• 6. International day (Global) | 11 Feb 25 | International Day of Women and Girls in Science

• 7. Publication (Global) | 01 Mar 25 to 31 Mar 25 | UN Global Sustainable Development Report | General event by United Nations
• 8. Publication (Global) | 01 Mar 25 to 31 Mar 25 | UNEP Global Environment Outlook | General event by UNEP
• 9. International day (Global) | 03 Mar 25 | World Wildlife Day
• 10. Conference (Global) | 04 Mar 25 to 05 Mar 25 | Responsible Investment Forum: New York | New York, US | In-person event by PEI
• 11. Discussion event (Global) | 05 Mar 25 to 07 Mar 25 | World Sustainable Development Summit | New Delhi, India | In-person event by The Energy & Resources Institute
• 12. International day (Global) | 08 Mar 25 | International Women's Day
• 13. Conference (Global) | 10 Mar 25 to 12 Mar 25 | Sustainability Summit | London, UK | In-person event by The Economist
• 14. Conference (Global) | 10 Mar 25 to 12 Mar 25 | Sustainability Week | London, UK | In-person event by The Economist
• 15. Conference (Global) | 11 Mar 25 | CSO Leaders Club | London, UK | In-person event by The Economist
• 16. Conference (Global) | 13 Mar 25 to 14 Mar 25 | Annual Scope 3 Summit | Berlin, Germany | In-person event by Conexus Financial
• 17. Conference (Global) | 18 Mar 25 to 19 Mar 25 | Wall Street Green Summit | New York, US | In-person event by Global Change Associates
• 18. Conference (Global) | 19 Mar 25 | Climate Capital Live 2025 | London, UK | Hybrid event by Financial Times
• 19. International day (Global) | 22 Mar 25 | World Water Day
• 20. International day (Global) | 24 Mar 25 | World Tuberculosis Day
• 21. International day (Global) | 30 Mar 25 | International Day of Zero Waste

• 22. Academic conference (Global) | 14 Apr 25 to 15 Apr 25 | International Summit on Global Warming | Paris, France | In-person event by WASET
• 23. Policy event (Global) | 21 Apr 25 to 02 May 25 | UN Permanent Forum on Indigenous Issues | New York, US | Restricted event by UN DESA
• 24. Conference & exhibition (Global) | 21 Apr 25 to 25 Apr 25 | EarthX | Dallas, US | In-person event by EarthX
• 25. International day (Global) | 22 Apr 25 | Earth Day
• 26. International day (Global) | 28 Apr 25 | World Day for Safety and Health at Work
• 27. Conference (Global) | 28 Apr 25 to 02 May 25 | DC Climate Week | Washington, D.C. | In-person event by DC Climate Week

• 28. Policy event (Global) | 07 May 25 to 08 May 25 | Forum on Science, Technology & Innovation for SDGs | New York, US | Restricted event by UN DESA
• 29. Conference (Global) | 21 May 25 to 22 May 25 | Climate & Impact Summit Europe | London, UK | In-person event by Financial Times