On the 27 of Sept. last year (my birthday) I asked ChatGPT= When is my birthday? Of course it answered there was no way it could know that. So I gave him a hint, when is Google's and Cosme Damian Churruca's (a Spanish admiral from over two centuries ago) birthday? That he answered and told me that given that information my birthday was on September 27 and it would congratulate me on that day. I told it it was the 27 and it apologized to me. So I think ChatGPT is very smart but is lost in time.