Looking up when an NFT was minted on ERC721 or ERC1155?

Hi everyone, I'm trying to answer what I thought was a straightforward question: how do you look up when an NFT was minted? Given it's fairly easy to do manually on etherscan, thought there'd be a simple OpenZeppelin interface for it, but doesn't seem like it. Any advice on how to do this?

You mean the exact timestamp of minting? This is not part of the standard requirement of an ERC721 NFT. However, it is fairly straightforward to add this information in the smart contract, isn't it?