Ethereum's Glamsterdam Upgrade in Final Stretch, Here Are Key Dates to Watch
Ethereum’s Glamsterdam upgrade is approaching a testnet milestone, with a Sepolia fork scheduled for Oct. 6 at 9:53:36 a.m. ET. The mainnet rollout is still targeted for the fourth quarter of 2026, but no specific date has been set.
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Ethereum users and developers watching the upgrade calendar now have a testnet date to track, and the Oct. 6 Sepolia fork is the next visible step. Anyone following the network’s rollout can see that the schedule has moved into a more concrete phase, with the mainnet timing still sitting in late 2026.
In practice, the Sepolia fork is a specific deployment point that can be marked on the calendar, while the mainnet remains only framed by a quarter rather than a day. What stays the same is that the upgrade is still on a future path, and no confirmed mainnet launch date has been announced.
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