Hedera to Conduct Testnet Upgrade on September 25th

Name: Testnet Upgrade
Start: 2025-09-25T17:00:00Z
End: 2025-09-26T17:00:00Z

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Hedera will upgrade its testnet to version 0.66 on September 25 at 17:00 UTC. The procedure is scheduled to last about 40 minutes, with intermittent disruptions anticipated during the maintenance window.

Event date: September 25, 2025 17:00 UTC

Hedera Status
@hashgraph

Scheduled (sep 25, 2025, 17:00 UTC): Hedera will be upgrading the Hedera testnet to v0.66 on Thursday, September 25 2025 at 17:00 UTC. The upgrade will take approximately 40 minutes to complete, users should expect some disruption to … https://stspg.io/x2vfw893k7wy?u=kyczw837j4xd

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