The Horizen network is expected to undergo a node upgrade on June 7, developers confirmed earlier this week on GitHub.
Per Messari data, the hard fork has been scheduled on Horizen mainnet at block 1,363,115, estimated to arrive on Jun. 7, 2023, at approximately 13:00 UTC. Node operators have been asked to update to Zen v4.0.0 before May 31, 2023.
The upgrade would bring enhancements to Horizen’s sidechain version 2 and fix minor bugs encountered in the current node version.
coindesk.com