[Base Network to Undergo Beryl Hard Fork Upgrade on June 26, 2026] According to Base's official documentation, the Base Network will activate the Beryl hard fork upgrade on June 26, 2026, at 02:00 (UTC+8), with the Sepolia testnet activating it earlier on June 19 at 02:00 (UTC+8). This upgrade introduces the B20 token standard, compatible with ERC-20, reduces the single proof withdrawal window from 7 days to 5 days, and implements Reth V2 to cut disk usage by 50% and improve throughput by 33%. Node operators must complete the software upgrade before the activation date.