When was Nyan Cat sold?

I'm curious, can you tell me the exact date when the famous Nyan Cat meme was sold as a non-fungible token (NFT)? I understand it was a significant event in the world of digital art and cryptocurrency, so I'm eager to know the specific timeline of this milestone. Was it during a particular auction, or was there a set date for the sale that I might have missed? Thank you for your help in clarifying this matter.