Hedera to Upgrade Mainnet v.0.66 on October 8

Name: Mainnet Upgrade
Start: 2025-10-08T00:00:00Z
End: 2025-10-09T00:00:00Z

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Hedera has scheduled a mainnet upgrade to version v.0.66 on October 8, at 17:00 UTC. The process is expected to take around 40 minutes, during which users may experience temporary network disruptions.

Event date: October 8, 2025 UTC

Hedera Status
@hashgraph

Scheduled (oct 8, 2025, 17:00 UTC): Hedera will be upgrading Hedera mainnet to v0.66 on Wednesday, October 08 2025 at 17:00 UTC. The upgrade will take approximately 40 minutes to complete, users should expect some disruption to networ… https://stspg.io/cwh416jdn712?u=py7dmbc4qycv

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