According to Zack Gall, vice president of communications at the ENF, the hard fork of the code of the EOSIO blockchain is slated for Sept. 21, which is when the official switch over to Antelope will take place. Because this is a hard fork, all member computers, or nodes, will have to upgrade in order to continue to run on the new protocol.
EOS Network Foundation Members Switch Support to Crypto Protocol Antelope After Hard Fork
