As the leading platform for sustainability information and data, illuminem is delighted to present a comprehensive list of the "must-attend" sustainability events of 2025 – a year set to reshape global efforts toward a greener future.

Events recommended by illuminem are marked with a ⭐, while those offering our readers an exclusive (typically 30%) discount carry the 🎟️ badge!

January

14-16 January | World Future Energy Summit | Abu Dhabi, UAE 🇦🇪
Main focus: Green Tech 🌍, Renewables ⚡
Speakers: Manali Desai, Chief Sustainability Officer AMESA, PepsiCo | Ghiwa Nakat, Executive Director, Green Peace | Dina Epifanova, Global Head of Sustainability, IFFCO Group
Description: The premier international event accelerating sustainability and the global transition to clean energy. Explore groundbreaking solutions in solar, wind, hydrogen, and energy storage, with opportunities to engage with thought leaders and disruptors

⭐ 20-24 January | World Economic Forum Annual Meeting | Davos, Switzerland 🇨🇭
Main focus: Ethical Governance 🏛, Social Responsibility 🤝, Sustainable Business 💼
Description: A high-profile summit gathering government officials, business leaders, and civil society to address global challenges. The 2025 agenda focuses on geopolitical shocks, improved living standards, and a just and inclusive energy transition

🎟️⭐ 20 January | CSO Awards Europe 2025 | Davos, Switzerland 🇨🇭
Main Focus: Sustainable Business 💼, Leadership 🏆
Description: Hosted during the  Economic Forum Annual Meeting, the Awards honour visionary Chief Sustainability Officers driving meaningful change across leading European companies. Contact us to join, as we’re delighted to offer our readers discounted tickets along with a special illuminem gift!

23-25 January | International Conference on Environmental, Cultural, Economic & Social Sustainability | Miami, USA 🇺🇲
Main focus: ESG 🌿, Sustainable Lifestyle 🍃
Description: An interdisciplinary conference exploring sustainable development for a dynamic planet, emphasising lessons, priorities, and solutions across ecological realities and economic, social, and cultural contexts

27-29 January | Cleantech Forum North America | San Diego, USA 🇺🇲
Main focus: Green Tech 🚀
Description: This forum serves as a nexus for cleantech innovation, unveiling the 2025 Global Cleantech 100 list and facilitating connections among entrepreneurs, investors, and corporates

February

10-11 February | World ESG Summit | Riyadh, Saudi Arabia 🇸🇦
Main focus: ESG 🌿
Description: A solutions-focused forum diving deep into ESG principles, driving breakthroughs in carbon management, climate technologies, and governance strategies

10-12 February | Greenbiz25 | Phoenix, USA 🇺🇲
Main focus: Sustainable Business 🏢, ESG 📊
Description: A collaborative platform empowering the food and retail sectors to lead climate action—accelerating decarbonisation and redefining ESG transparency

11-13 February | Globe x Change | Toronto, Canada 🇨🇦
Main focus: Ethical Governance 🏛, Sustainable Business 💼
Description: North America’s leading climate innovation summit, bringing together change-makers to unlock clean tech potential, foster meaningful collaborations, and inspire impactful climate strategies

⭐ 25-27 February | Resumed UN Biodiversity Conference (COP16) | Rome, Italy 🇮🇹
Main focus: Environmental Sustainability 🐟
Description: A significant gathering to finalise decisions on the Kunming-Montreal Global Biodiversity Framework, emphasising the critical role of sustainable agrifood systems in halting biodiversity loss and advancing global conservation targets

March

5-6 March | Net Zero & Scope 3 LIVE | London, UK 🇬🇧
Main focus: Net Zero 🌿, Carbon Removal 💨
Speakers: Tom Byrne, Head of Net Zero and Environment, British Airways | Tom Salisbury, Chief Sustainability Officer, GKN Automotive | Darshana Myronidis, Group Sustainability Director, Virgin
Description: This premier conference brings together global sustainability leaders to explore innovative strategies for achieving net-zero emissions and effective carbon removal, with access to expert panels, interactive workshops, and networking opportunities

⭐ 7 March | Verbier Summit | Verbier, Switzerland 🇨🇭
Main Focus: Mitigation 🌍
Description: This intimate summit gathers global visionaries to shape strategies for a sustainable future, through keynote dialogues and outdoor networking

⭐ 10-12 March | The Economist Sustainability Week | London, UK 🇬🇧
Main focus: ESG 🏢, Public Governance 🌍
Speakers: Inger Andersen, Executive Director, UNEP | Benoit Bazin, Chief Executive, Saint-Gobain | Leyla Ertur, Chief Sustainability Officer, H&M
Description: Celebrating its 10th anniversary, this event convenes industry leaders, policymakers, and entrepreneurs to discuss actionable solutions for reducing emissions and enhancing environmental impact

12-13 March | World Ocean Summit & Expo | Tokyo, Japan 🇯🇵
Main focus: ESG 🏢, Public Governance 🌍
Speakers: Peter Thomson, UN Secretary-General’s special envoy for the ocean | Vidar Helgesen, Executive Secretary, IOC-UNESCO
Description: Organized by Economist Impact, this summit gathers ocean stakeholders to share insights and promote sustainable ocean economies. The event features discussions on marine conservation, sustainable practices, and innovative solutions for ocean health

18-19 March | Wall Street Green Summit | New York City, USA 🇺🇲
Main focus: Sustainable Finance 💰, Green Tech 🚀
Description: As one of the longest-running sustainable finance events, the summit connects industry leaders to explore the role of finance in addressing climate change

19-21 March | Villars Institute Summit | Villars-sur-Ollon, Switzerland 🇨🇭
Main Focus:  Mitigation 🌍
Description: A retreat-style convention of senior executives, policymakers, and thought leaders dedicated to reshaping leadership for a sustainable future. Combining reflective dialogue with practical strategies, the summit fosters collaboration to address global sustainability challenges

28-30 March | Climate Reality Leadership Training | Paris, France 🇫🇷
Main focus: Climate Change 🌱
Description: Join former U.S. Vice President Al Gore and a distinguished panel of experts for an immersive three-day training designed to equip individuals with the knowledge and tools to drive ambitious climate solutions through in-depth workshops, presentations, and networking sessions

31 March-1 April | Climate Chance Europe Africa | Marseille, France 🇫🇷
Main focus: Adaptation 🌍
Description: This gathering bridges European and African stakeholders to tackle climate adaptation challenges in the Mediterranean basin, with an aim to deliver actionable recommendations for policymakers ahead of major international climate meetings

April

15-16 April | ClimateTech Connect | Washington, D.C., USA 🇺🇸
Main focus: Mitigation 🌍, Green Tech 🚀
Description: A conference and trade show for leaders advancing innovation in climate resilience and adaptation through technology, bringing together experts from various sectors for keynotes, panel discussions, and TED-style talks

19-27 April | SF Climate Week | San Francisco, USA 🇺🇲
Main focus: Climate Change 🌱, Ethical Governance 🌍
Description: A week-long series of independently organized events throughout the Bay Area, fostering collaboration among climate organisations, leaders, and the community to address climate challenges and drive innovation

21-25 April | EarthX2025 | Dallas, USA 🇺🇲
Main focus: Biodiversity 🌳, Renewables ⚡
Speakers: Susan Eisenhower, International Security Expert and Author | David Howell, Former Director, CIA | Hap Klopp, Founder and CEO, The North Face
Description: As one of the world's largest environmental gatherings, this event features immersive exhibitions and expert panels promoting conservation and renewable energy technologies, attracting a global audience committed to environmental stewardship

29-30 April | Green Hydrogen Summit Europe | Lisbon, Portugal 🇵🇹
Main focus: Renewables ⚡, Green Hydrogen 🌱
Description: This premier event brings together policymakers, industry leaders, and innovators to explore green hydrogen's role in Europe's energy transformation, focusing on policy frameworks, technological advancements, and investment opportunities

28 April-9 May | Basel Convention COP-17 | Geneva, Switzerland 🇨🇭
Main focus: Environmental Sustainability 🌍
Description: A critical assembly of global policymakers and environmental experts dedicated to strengthening international protocols on hazardous waste management, aiming to protect communities and ecosystems from adverse impacts

May

🎟️⭐ 4 May | Club of Florence's Special Gathering: A Renewed Humanism | Florence, Italy 🇮🇹
Description: One of the most highly attended events by leading sustainability figures, co-hosted by Mark Carney (fmr. Governor of the Bank of England), WWF's Manuel Vidal, and Jane Goodall. With exclusive media partnership from illuminem, more details will be released soon

5-8 May | Ecosperity Week | Singapore 🇸🇬
Main Focus: Carbon 🌱, Green Tech ⚡
Description: A flagship event with a spotlight on Asia’s transition to a low-carbon future, convening global leaders, policymakers, and innovators to explore scalable decarbonisation solutions, progressive energy policies, and sustainable financing strategies

7-8 May | Turing Fest | Edinburgh, Scotland 🏴󠁧󠁢󠁳󠁣󠁴󠁿
Main focus: Green Tech 🚀, Sustainable Business 💼
Description: Scotland's premier tech conference bringing together innovators from various industries and leaders in technology, product development, and growth

13-14 May | World Circular Economy Forum | São Paulo, Brazil 🇧🇷
Main focus: Environmental Sustainability 🌍
Description: An invite-only event spotlighting sustainable growth, regenerative economy and, the role of the production sector in transitioning toward a circular economy

15-16 May | World Circular Economy Forum  | Online 🌐
Main focus: Environmental Sustainability 🌍
Description: A virtual extension of the World Circular Economy Forum to dive deeper into circular economy solutions through expert-led sessions and collaborative accelerator workshops, open to all

20–21 May | Carbon Unbound East Coast | New York City, USA 🇺🇸
Main focus: Carbon Removal 🌫️
Description: This premier summit gathers senior executives, investors, policymakers, and innovators to accelerate gigaton-scale carbon removal solutions. The event features in-depth analyses of the evolving U.S. political landscape's impact on CDR, strategies to boost demand, and discussions on equitable outcomes

20-22 May | Greentech Festival | Berlin, Germany 🇩🇪
Main focus: Green Tech 🚀, Sustainable Business 💼
Description: A global platform uniting innovators, change-makers, and communities to showcase cutting-edge green technologies and drive industry decarbonisation

24-26 May | ChangeNow | Paris, France 🇫🇷
Main focus: Environmental Sustainability 🌍, ESG 💡
Description: A world-renowned event showcasing groundbreaking solutions for the planet. It brings together visionaries and entrepreneurs to tackle pressing environmental and social challenges

June

3-4 June | Ecosummit Berlin | Berlin, Germany 🇩🇪
Main focus: Green Tech 🚀, Net Zero 🌿
Description: Celebrating its 15th anniversary, this is the perfect platform for green startups and investors in energy, mobility, and urban innovation. The event aims to foster collaborations to decarbonize the economy and promote sustainable technologies

3-4 June | Lisbon Energy Summit | Lisbon, Portugal 🇵🇹
Main focus: Energy 💡, Energy Transition ⚡
Description: Endorsed by the Ministry of Environment and Energy, this summit is the Iberian region's leading event focusing on balancing energy security with net-zero ambitions

9–13 June | 2025 UN Ocean Conference | Nice, France 🇫🇷
Main focus: Water 🐟
Description: Co-hosted by France and Costa Rica, this high-level conference aims to accelerate action and mobilise all actors to conserve and sustainably use the ocean by bringing together governments, NGOs, scientists, and the private sector

16-18 June | Terra Tuscany | Pisa, Tuscany, Italy 🇮🇹
Main focus: Sustainable Business 💼
Description: An intimate gathering for sustainability professionals, started with illuminem in 2024. Terra Tuscany offers immersive discussions on climate and sustainability, including keynotes, panels, workshops, and networking activities. 

19-21 June | Asia Climate Forum | Singapore 🇸🇬
Main focus: Green Tech 🚀, Sustainable Business 💼
Description: As part of the Singapore International Water Week, this event serves as a global platform for  government officials, private sector representatives, researchers, and key stakeholders to share knowledge and best practices in climate change mitigation and adaptation

21-29 June | London Climate Action Week | London, UK 🇬🇧
Main focus: Green Tech 🚀, Net Zero 🌿
Description: Founded in 2019, this is one of the world’s largest independent climate change events. It brings together individuals, organizations, and communities to host a diverse range of events focused on finding global solutions to climate change

⭐ 24-25 June | Reset Connect London | London, UK 🇬🇧
Main focus: Sustainable Business 💼, Green Tech 🚀, Net Zero 🌿
Description: The flagship event of London Climate Action Week, showcasing the latest in clean energy, green finance, and impact investments to accelerate net-zero strategies and sustainable growth

July

10-12 July | Waste Management Europe Conference and Exhibition | Bologna, Italy 🇮🇹
Main focus: Waste 🗑️
Description: As Europe's leading event focused on waste management and the circular economy, this conference brings together global experts to discuss innovative solutions and aims to accelerate positive change in waste management, recycling, reuse, and circularity

29-30 July | Australian Clean Energy Summit | Sydney, Australia 🇦🇺
Main focus: Renewables ⚡, Energy Transition 🌿
Description: Hosted by the Clean Energy Council, this flagship conference unites thought leaders and decision-makers from industry, government, and finance to share models, trends, and technological innovations driving the nation's energy transformation

September

⭐ 11-12 September | Rethink Event | WanChai, Hong Kong 🇭🇰
Main Focus: Sustainable Business 💼
Description: A transformative platform focused on circular economy solutions and sustainable innovation. Industry leaders, policymakers, and entrepreneurs come together to reimagine business models for a resource-efficient future

15-17 September | The Drop | Malmö, Sweden 🇸🇪
Main Focus: Green Tech 🚀, Sustainable Business 💼
Description: A dynamic gathering of climate tech innovators, investors, and visionaries, designed to accelerate solutions to the climate crisis through thought-provoking discussions, hands-on workshops, and networking opportunities

⭐ 21-28 September | NY Climate Week | New York, USA 🇺🇲
Main focus: Sustainable Business 💼, Energy 💡, Net Zero 🌿
Description: Recognised as one of the world's largest climate gatherings, it convenes industry leaders, policymakers, and innovators to accelerate global action on sustainability. 

⭐ 29 September - 2 October | Building Bridges | Geneva, Switzerland 🇨🇭
Main focus: Sustainable Finance 💰
Description: Europe's leading forum for sustainable finance, renowned for launching transformative initiatives, like the Carbon Accelerator Programme for the Environment (CAPE), and aligning financial systems with sustainability goals. Read more on the 2024 edition

October

🎟️⭐ 1-2 October | London Climate Tech Show | London, UK 🇬🇧
Main focus: Green Tech 🚀
Description: The UK's largest event dedicated to the rapidly evolving climate technology sector, uniting innovators, investors, and industry leaders. Explore sustainable solutions and network with key stakeholders committed to combating climate change

6-7 October | Sustainability Week Europe | Amsterdam, Netherlands 🇳🇱
Main focus: Corporate Social Responsibility 💼
Description: This event brings together European CXOs to accelerate sustainable business transformations. With a focus on actionable insights, the programme includes case studies, success stories, and guidance on navigating new EU regulations

⭐ 12-15 October | Gitex Impact | Dubai, UAE 🇦🇪
Main focus: Green Tech 🚀, Sustainable Business 💼
Description: This groundbreaking platform connects climate-tech pioneers, ESG innovators, and impact investors, showcasing cutting-edge solutions and bold strategies aimed at driving sustainable business models and fostering public-private partnerships

13-16 October | Sustainable Brands | San Diego, USA 🇺🇸
Main focus: Sustainable Business 💼, Corporate Social Responsibility 🤝
Description: This even brings innovators and leaders together to reimagine business for the planet through immersive workshops, visionary keynotes, and networking events

14 October | SOSV Climate Tech Summit | Online 🌐
Main Focus: Green Tech 🚀
Description: A virtual gathering spotlighting pioneering startups and investment opportunities in climate tech by connecting entrepreneurs with investors to accelerate innovation for a sustainable future

16-18 October | Arctic Circle Assembly | Reykjavik, Iceland 🇮🇸
Main focus: Environmental Sustainability 🌍
Description: A leading forum for policymakers, scientists, and industry leaders to address the critical challenges of Arctic sustainability and global climate change. The event facilitates dialogue and cooperation on issues impacting the Arctic region and beyond

21-22 October | Carbon Unbound Europe | London, UK 🇬🇧
Main Focus: Carbon Removal 🌫️
Description: An event exploring carbon removal technologies and market mechanisms essential to achieving net-zero targets, with hands-on workshops and expert panels

November

4-6 November | Smart Cities Convention | Barcelona, Spain 🇪🇸
Main focus: Green Tech 🚀, Sustainable Living 🏡
Description: A leading global hub for urban innovation – the event brings together key players from business, government, and civil society to explore the future of smarter, greener, and more inclusive cities, tackling challenges like mobility, energy, and citizen engagement

⭐ 6 November | The Conduit Green Economy Forum: Financing the Green Transition | London, UK 🇬🇧
Main focus: Social Responsibility 🤝, Net Zero 🌿
Description: An exclusive forum gathering leaders in finance, policy, and sustainability to discuss actionable strategies for funding the green transition – with a focus on innovative financial instruments and collaborative approaches

10-13 November | WebSummit | Lisbon, Portugal 🇵🇹
Main focus: Green Tech 🚀, Net Zero 🌿
Description: A powerhouse event for innovators and leaders, uniting CEOs, founders, and investors to shape the future of technology. Expect transformative conversations on how tech can drive sustainability, with a dynamic mix of talks, networking, and groundbreaking showcases

⭐ 10-21 November | COP30: UN Climate Change Conference | Belém, Brazil 🇧🇷 
Main focus: Climate Change 🌳, Environmental Sustainability 🌍
Description: This landmark event gathers nations, NGOs, and stakeholders to tackle the climate crisis. It’s a unique platform to negotiate solutions and assess progress on climate goals while highlighting the region’s ecological significance

19-20 November | Slush | Helsinki, Finland 🇫🇮
Main Focus: Green Tech 🚀
Description: A high-energy founder-focused event where startups meet investors, showcasing breakthrough technologies in sustainability, with unparalleled networking and knowledge-sharing opportunities

Keep an eye on this page, as we continue to update the calendar with new unmissable events. Also, don’t forget to subscribe to our acclaimed free newsletters to never miss a beat in sustainability. Contact us to promote your event and connect with our community of 500,000+ sustainability professionals.