When did Coinbase list dogwifhat?

Could you please clarify your question? It seems like there might be a typo or confusion in the term "dogwifhat". As a professional practitioner in the field of cryptocurrency and finance, I'm not familiar with any cryptocurrency or asset named "dogwifhat" listed on Coinbase. Coinbase is a well-known cryptocurrency exchange platform that lists various digital assets for trading. If you're referring to a specific cryptocurrency or token, it would be helpful if you could provide the correct name or more context so that I can better assist you. However, if you're asking about when a particular cryptocurrency was listed on Coinbase, typically such information would be available on Coinbase's official announcements or news releases. You could also check their website or social media channels for updates on new listings. Remember, when investing in cryptocurrencies, it's always important to do your own research and understand the risks involved. Cryptocurrencies are volatile and can fluctuate significantly in value. Be sure to diversify your portfolio and consult with a financial advisor if needed. Could you please clarify your question or provide more information so that I can better assist you?