just found an interesting article to read from aeternity blog

#WelcomeIris

After the community approval of the Iris Hard fork, the æternity crypto foundation is delighted to announce that the Iris final release has been published and that activation is proposed at block height 441444 which is expected to happen approximately on June 10th @ 9:11 AM CEST.
This marks a historic milestone of æternity network development along with the last three scheduled hard forks and should provide the æcosystem with an amazing set of new features that will become available once the protocol update is activated at block 441444.
more information here https://blog.aeternity.com/welcomeiris-6bd085bec0f9