BNB Chain is expected to undergo the Planck hard fork upgrade on April 12

ChainCatcher message, BNB Chain will undergo a hard fork upgrade codenamed "Planck" at block height 27,281,024. Based on the current network block generation speed, this upgrade is expected to start at 13:30 Beijing time on April 12.

The core team stated that this upgrade aims to enhance the security and stability of the network. Mainnet validators and full node operators should switch their software version to v1.1.21 by April 12, 2023. (source link)