According to the blog post, the Ethereum London Hard fork will go live on the testnet starting from June 24. In a blog post on the Ethereum foundation website, Ethereum core developer Tim Beiko wrote that Ropsten, Goerli, Rinkeby go live in London.
Ethereum much-coveted “London” Hard Fork now set block height for Three Etherum Testnet. The release schedule is as follows:
| Network | Block Number | Expected Date |
| Ropsten | 10499401 | June 24, 2021 |
| Goerli | 5062605 | June 30, 2021 |
| Rinkeby | 8897988 | July 7, 2021 |
| Mainnet | TBD once testnets fork successfully. | TBD once testnets fork successfully. |
Note: the Kovan network will be upgraded later, likely after the Mainnet block has passed.
According to Tim Beiko:
“As of now, only testnet (Ropsten, Goerli, Rinkeby) have been scheduled for London. However, once the upgrade has successfully been activated on these networks. After that, a block will be set on the Ethereum mainnet and communicated on this blog and other venues.
A few months ago Berlin was activated on the Ethereum mainnet. At least five other EIPs are likely to Join EIP 1559 in London. EIP 1559 flips typical blockchain transactions on its head to fix various issues with the Ethereum user experience. For example, traditionally, users send a gas fee to miners for marketing to be included in a block. It is not explicitly designed to reduce gas costs. Many expected to bring them down for users significantly. It may also cut into miner revenues by upward of 50%. This was one reason why it sparked a ‘Miner revolt.’
The five other EIPs includes
| EIP 1559 | Fee Market change for ETH 1.0 chain |
| EIP 3198 | BASE FEE 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 |
The blog post that such significant system upgrades to a decentralized system are a feat of coordination.
“The Decentralized nature of blockchain system makes a network upgrade more difficult. Network Upgrade in a blockchain requires cooperation and communication with the community, as well as with the developers of the various Ethereum client for the transaction to go smoothly.”
