Ethereum’s next major upgrade Glamsterdam: the public testnet timeline has been revealed—tentatively scheduled for September 10/6 on Sepolia.
According to Odaily (2026-09-11), citing researcher Christine D. Kim: developers plan to activate Glamsterdam on the Sepolia testnet at 2026-10-06 13:53 (UTC), but this timing still depends on whether subsequent tests can stabilize. The earlier Devnet-9, which had about 1,000 validator nodes, still hasn’t been able to complete final confirmation properly; the earlier Devnet-8 also exposed consensus-layer issues that could potentially cause the entire network to come to a halt.
Independent review: Unlock Blockchain (2026-09-11) states in the same way that the Sepolia target remains 10/6 at 13:53 UTC, and that the next round of key private developer testnet testing is expected to fall around September 14. The article also emphasizes that neither Hoodi nor the mainnet date has been locked in yet; the December mainnet is only a directional goal, not a confirmed schedule.
This is a testnet plan, not a mainnet launch announcement.
The image is a schematic/AI-generated and not an official screenshot.
Data as of: Odaily / Unlock Blockchain 2026-09-11; ACDC
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For information sharing only and does not constitute investment advice.
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