London Network Upgrade: block number 12,965,000 projected August 5. Update your nodes!

See the full post here for more info, including client releases: London Mainnet announcement If you are running Eth2 validators, you must also update your Eth1 nodes! If you are just a user of the network, you don't need to do anything or update anywhere - anyone asking for your wallet information to prepare for London / 1559 is probably a scam.

See a countdown here.

Misconceptions on EIP-1559 causing high gas fees

EthCatherders London Community Call: Aug 02, 1400 UTC

EthStaker live watch call: Aug. 9:00 UTC "livestream we’ll be having a POAP.art London-themed Painting Party, multiple POAP distributions, a POAP.fun raffle, and special guests!"

EIPs include:

• EIP-1559: Fee market change for ETH 1.0 chain
• EIP-3198: BASEFEE opcode
• EIP-3529: Reduction in refunds
• EIP-3541: Reject new contracts starting with the 0xEF byte
• EIP-3554: Difficulty Bomb Delay to December 1st 2021