The Hoodi testnet deployment follows the Glamsterdam upgrade's earlier activation on the Sepolia testnet on October 6, 2026.

From the articleEthereum Gas Limit Rises as Glamsterdam Moves to Hoodi Testnet - BlockonomiAlso in Ethereum sets October 26 for Hoodi’s 200 million gas test, Ethereum Eyes Massive 3.3x Gas Limit Boost as Glamsterdam Approaches - U.Today, Ethereum's next upgrade has a date on Hoodi, but not on mainnet