Never miss another web3 deadline. 45 upcoming hackathons, conferences and popup cities from September 2026 through Q1 2027, plus 2 bonus events for mid-2027. Multi-chain: Ethereum, Solana, Bitcoin, Base, Algorand, Decentraland, stablecoins and more. Each entry includes name, dates, location, ecosystem, prize pool (where the organizer announced one), official registration URL and notes. What you get: - events.csv - 45 rows, ready to import into Notion, Sheets or Excel - events.md - the same calendar grouped by month for quick reading - README with sourcing notes and data snapshot date Every entry was checked against official organizer pages or major event platforms (Devpost, DoraHacks, ETHGlobal, ethereum.org, Coinpedia, organizer sites) on September 5, 2026. No invented dates, no invented prize pools. Approximate deadlines are marked. Hackathon deadlines move fast. This calendar puts them in one place so you can pick your events and confirm on the official page. License: personal and commercial use. No resale or redistribution of the calendar itself, as-is.