The “Altair Mainnet Announcement” by Danny Ryan invites all node operators of Ethereum 2.0 to upgrade their software to avoid the validator downtime penalty.
Altair Mainnet launch at epoch 74240 (Oct 27, 2021, 10:56:23am UTC)!https://t.co/fTxZBLQqJ5
Upgrade your nodes!
Now, onward to the Merge 🚀
— dannyryan 🚂 (@dannyryan) October 5, 2021
According to the official blog post by Mr. Ryan, the Altair beacon chain (ETH2 initial phase) upgrade will go live in mainnet at epoch 74240. This epoch is expected to come at 10:56 a.m. UTC on Oct. 27, 2021.
To keep their nodes synchronized with post-Altair consensus, node operators should upgrade their clients. Software builds for all clients—Lighthouse, Lodestar, Prysm, Nimbus and Teku—are available via the links in the announcement.
Read More On Ethereum Official Blog: https://blog.ethereum.org/2021/10/05/altair-announcement/