Ethereum’s latest network upgrade, Constantinople, will take place at block number 7,080,000, which is predicted to occur on Wednesday, January 16.
The countdown to Constantinople can be tracked on Ethereum explorer, AmberData.
Constantinople contains five distinct upgrades, four of which are designed to optimize performance:
EIP-1234: Constantinople Difficulty Bomb Delay and Block Reward Adjustment
Delays the difficulty bomb for approximately 12 months and decreases block, uncle, and nephew rewards by 33%.