Ethereum schedules Glamsterdam upgrade on Sepolia for Oct. 6
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Ethereum has set Glamsterdam to activate on the Sepolia testnet on Oct. 6, with one report giving the time as 13:53:36 UTC and another placing the fork at epoch 353,024. The upgrade combines execution-layer changes with a consensus-layer update, and its mainnet timing is still not fixed, with one report saying the target is the fourth quarter of 2026. The testnet rollout is intended to exercise changes to block building, parallel processing, block-level access lists and gas pricing before any mainnet deployment.
Key claims & sources
What it means
Validators, node operators and Sepolia users will notice the change first on Oct. 6, because the fork is scheduled to activate on that testnet and node operators have to update both execution and consensus clients beforehand. The same setup also gives the wider Ethereum sector a live environment to watch how the upgraded rules behave before any mainnet schedule is fixed.
In practice, Glamsterdam changes what Sepolia nodes must run and what the testnet can exercise: proposer-builder separation, block-level access lists, new gas pricing and the execution-and-consensus split are all part of the activation. What stays the same for now is that mainnet has no confirmed date, even though one report places the target in the fourth quarter of 2026.
Market reaction i
The move was larger before the first headline than after. That is an observation, not an explanation: the market also moves on things nobody publishes.
Coverage timeline
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Crypto Economy
context
Has this happened before?
| When | What happened | Figure |
|---|---|---|
| 39 days ago | Binance Wallet lets users pay gas fees in USDT across four major networks event | 1 actors in common · 4 news media |
| 39 days ago | ‘It’s really not just a blockchain anymore’: Vitalik Buterin maps Ethereum’s path to 2030 event | 1 actors in common · 2 news media |
| 39 days ago | Ethereum's Glamsterdam Upgrade in Final Stretch, Here Are Key Dates to Watch event | 1 actors in common · 3 news media |
| 40 days ago | Vitalik Buterin says Ethereum is becoming a cryptographic world computer event | 1 actors in common · 2 news media |
| 40 days ago | GIWA Says Mainnet Has Not Launched, Rules Out RPC Leak Claims event | 1 actors in common · 3 news media |