Byzantium Fork

/   block 

keyboard_arrow_up  ethusd

0  since last block

source	block number	time (seconds)	difficulty (tera)	reward (eth)	hash
infura.io	...	...	...	...	...
etherscan.io	...	...	...	...	...
etherchain.org	...	...	...	...	...
blockcypher.com	...	...	...	...	...

FAQ

Where is the official announcement?

Visit here for the official announcement.

What is the purpose of this hardfork?

Metropolis is a 2 part (part 1: Byzantium, part 2: Constantinople) milestone hard fork that upgrades Ethereum. Visit here for the EIPs involved.

Is there an easier explanation of the upgrades?

Visit here for a video explanation or here for a short explanation.

Do I need to upgrade my wallet?

Please upgrade your client if you are running an Ethereum node e.g. mist, geth, parity.
If you are using a wallet that is not a node, your provider should upgrade their systems e.g. myetherwallet, jaxx.