Ethereum Berlin Upgrade Anniversary
Today marks two years since the **Ethereum Berlin upgrade** was activated at block 12,244,000 on April 15, 2021.
The upgrade delivered key improvements:
- Optimized gas cost calculations
- Enhanced support for multiple transaction types
- Increased network efficiency
This update was part of Ethereum's ongoing evolution, following earlier improvements like the Constantinople upgrade which reduced mining rewards and prepared for proof-of-stake transition.
*Learn more about Ethereum's technical milestones at [ethereum.org](https://ethereum.org/history)*