Ethereum Postpones Glamsterdam Upgrade on Hoodi Testnet
Ethereum postponed the Glamsterdam upgrade on Hoodi, canceling its planned activation on October 26, 2026, at 17:42:48 UTC. No new date has been set, so the previous Hoodi schedule and activation instructions are no longer current.
Key takeaways
- Ethereum postponed Glamsterdam’s Hoodi testnet activation.
- The canceled activation was scheduled for October 26, 2026, at 17:42:48 UTC.
- The Ethereum Foundation has not set a replacement activation date.
- The postponement supersedes the earlier Hoodi schedule and activation instructions.
Ethereum has postponed the Glamsterdam upgrade on the Hoodi testnet. It was scheduled to activate on October 26, 2026, at 17:42:48 UTC, but the Ethereum Foundation says there is no replacement date yet.
The announcement supersedes the earlier Hoodi schedule and its activation instructions. Anyone operating a Hoodi node should follow updated guidance rather than prepare for the canceled time.
Why was Glamsterdam postponed on Hoodi?
The Ethereum Foundation did not provide a reason in the postponement notice. However, security researchers had previously flagged a risk that new gas rules in Glamsterdam could cause some existing smart contracts to permanently record failed operations, and developers also fixed a bug that could have sent staking deposits to block builders instead of their intended destination. The delay may relate to these unresolved issues, though the Foundation has not confirmed this.
Hoodi is a test network where developers and infrastructure operators can test protocol changes before a potential mainnet rollout. Glamsterdam had been scheduled for Hoodi after an earlier Sepolia testnet activation. That staged approach matters: a postponed testnet activation shifts testing plans, but does not by itself establish a new mainnet timeline.
What should Hoodi users do next?
Node operators and other Hoodi participants should treat October 26 activation instructions as obsolete and wait for revised guidance from the Ethereum Foundation. With no replacement date announced, there is no confirmed new activation time to plan around.
For everyday ETH users, this notice does not announce a change to the live Ethereum network. The practical distinction is that Glamsterdam testing on Hoodi is delayed, while the eventual mainnet schedule remains a separate decision.
Frequently asked questions
When was Glamsterdam supposed to activate on Hoodi?
The Hoodi testnet activation was scheduled for October 26, 2026, at 17:42:48 UTC.
Has Ethereum announced a new Hoodi activation date?
No. The Ethereum Foundation’s postponement announcement did not set a replacement date.
Does the Hoodi delay change Ethereum mainnet?
The announcement concerns the Hoodi testnet and does not announce a change to the live Ethereum network or a mainnet activation date.
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