instead of clocks. And the popcorn flowed over computer terminals when at block 7,280,000, at precisely 7.52pm UTC, the Ethereum blockchain performed a hard fork. The world’s second most valuable blockchain (after bitcoin) is now ready for the next stage in its evolution. That is expected to make it faster, stronger, and more easily accessible to even more users and developers.
Link: Happy New Fork! Ethereum Constantinople upgrade declared a success.