Polygon is scheduled to implement the Giugliano hard fork upgrade on its mainnet at approximately 22:00 UTC on April 8, at block height 85,268,500. The upgrade aims to enhance network performance by allowing producers to announce blocks earlier, embedding fee parameters into block headers, and introducing a new RPC interface for fee data support. Node operators are advised to upgrade Bor to version v2.7.0 or Erigon to version v3.5.0 to maintain seamless operations.