Planned Network Upgrades
The Ethereum network goes through planned network upgrades via hard forks every nine months. The names given to future planned network upgrades.
The Constantinople hard fork will occur at block 7,280,000 on approximately 2/27/2019. The Constantinople fork consists of 4 EIPS:
- EIP 145: Bitwise shifting instructions in EVM
- EIP 1014: Skinny CREATE2
- EIP 1052: EXTCODEHASH Opcode
- EIP 1234: Constantinople Difficulty Bomb Delay and Block Reward Adjustment
Istanbul is the name given to the hard fork expected to occur nine months after Constantinople. This will be approximately 2019-11-27.