September promises to be a busy month for the Ethereum community, with more than a dozen hackathons and conferences planned worldwide, bringing together developers, investors, and Web3 enthusiasts.
In September 2025, 12 Ethereum community meetups of various formats are scheduled across Africa, Europe, Asia, and the Americas. Conference and hackathon participants will discuss the development of the ecosystem and present new projects built on the Ethereum blockchain.
Key Ethereum events in September 2025 include:
- ETHAccra Hackathon . A hackathon and summit focused on African Web3 initiatives, taking place September 3–6 in Accra, Ghana.
- ETHWarsaw . A conference and hackathon focusing on scalability, privacy, and Web3 innovations, taking place September 4–7 in Warsaw, Poland.
- ETHIstanbul . A conference and hackathon bringing together local and international crypto communities, taking place September 5–7 in Istanbul, Turkey.
- ETHSafari 2025 . A conference emphasizing sustainable development and blockchain adoption in Africa, taking place September 7–14 in Nairobi, Kenya.
- ETHBrasil . A two-day conference featuring international speakers, taking place September 10–11 in São Paulo, Brazil.
- ETHBoston 2025 . A conference with technical sessions and workshops, taking place September 12–13 in Boston, USA.
- ETHNA 2025 . A conference focusing on European projects and blockchain research, taking place September 12–13 in Catania, Italy.
- ETHWien 2025 . A hackathon for developers of infrastructure solutions and dApps on the Ethereum blockchain, taking place September 12–14 in Vienna, Austria.
- ETHTokyo . A conference uniting the Asian and global Web3 communities, taking place September 12–15 in Tokyo, Japan.
- EDCON Osaka 2025 . A major educational conference in the Ethereum ecosystem, taking place September 16–19 in Osaka, Japan.
- ETHSofia . A conference and hackathon featuring international teams, taking place September 23–25 in Sofia, Bulgaria.
- ETHGlobal New Delhi . The largest hackathon of the fall, taking place September 26–28 in New Delhi, India.
Developers, researchers, and business representatives will be able to use September’s Ethereum community gatherings as platforms for knowledge exchange, creating and testing new solutions, and building long-term partnerships. Expected guests include Ethereum Co-Founder Vitalik Buterin, ConsenSys Founder Joseph Lubin, as well as representatives from Polygon, Optimism, StarkWare, and other crypto companies.
The packed schedule further highlights the maturity and global scale of the Ethereum ecosystem, whose governance mechanisms were covered in detail in CP Media’s special feature .
