According to the RHS it won't survive a frost...so maybe worth keeping it in a pot to protect it long-term? I suppose you can use fleece to protect it...but if you're in the UK check the last predicted frost date to make sure you don't kill it by rushing. https://www.rhs.org.uk/Plants/12767/Canary-Island-date-palm/Details
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https://www.rhs.org.uk/Plants/12767/Canary-Island-date-palm/Details
https://www.google.com/search?q=canary+island+palms+in+Southsea&rlz=1C1CHFX_en-gbGB480GB480&source=lnms&tbm=isch&sa=X&ved=2ahUKEwiFrb6n69XoAhXjoFwKHbIuCRsQ_AUoAXoECA0QAw&biw=1366&bih=657
Big ones in Southsea , Hants