Ethereum (ETH) is set to introduce its latest upgrade, dubbed the Fusaka upgrade, on December 3, 2025, a timeline that has been accelerated from previous expectations of a 2026 launch. This announcement comes from Christine Kim, a researcher monitoring Ethereum’s development progress.

The confirmation of the mainnet activation date was made during the recent All Core Developers Consensus (ACDC) call, where developers also established schedules for public testnet upgrades and the blob-parameter-only (BPO) hard fork related to Fusaka.

Ethereum’s Fusaka Devnet Update

The developers reached a consensus on these matters with surprising ease, indicating a smooth path forward despite ongoing testing challenges. They remain committed to the December activation date, barring any major setb

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