Yes. Alpenglow is scheduled to activate on Solana mainnet-beta tomorrow, October 21, at about 14:00 UTC; Anza updated its earlier estimate of about 14:50 UTC after epoch 1064 began tracking earlier than expected (Anza’s latest schedule, timing update).

SolanaOct 20, 2026, 17:49 UTC

The roughly 150 ms figure is the target, compared with about 12.8 seconds under TowerBFT. It is an expected protocol target, not a confirmed post-activation measurement (Solana Foundation).

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Answered Oct 20, 2026, 17:49 UTC

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The supplied posts and earlier findings place activation on October 21, 2026, around 14:50 UTC, and cite an approximately 150 ms finality target versus 12.8 seconds. These independent reads check whether the official schedule or expected performance changed or was confirmed after October 13.
The latest official update confirms Alpenglow is scheduled for mainnet-beta tomorrow, October 21, at about 14:00 UTC, revising Anza’s earlier estimate of about 14:50 UTC. The Solana Foundation still describes roughly 150 ms as the target finality, down from 12.8 seconds.