Solana research and development firm Anza announced that Solana's Alpenglow v4.3.2 upgrade is scheduled for mainnet-beta activation on October 21, 2026, at epoch 1064 around 14:50 UTC.

Base blockchains that settle transactions on their own network, such as Ethereum, Solana, and Avalanche, competing on security, throughput, decentralization, and developer ecosystems.

Mainnet debuts, major upgrades, and ecosystem milestones that mark when networks ship, from genesis blocks to landmark hard forks.