Christmas Shopping Anyone?

When do you start Christmas shopping?  I've been reading a lot of blogs and FB pages that are talking about their shopping lists.  Tonight I read that one person tries to be done by the end of October.  I don't usually know who I am shopping for before then.  When do you start and hope to finish shopping?  How early do you know who you will need to shop for?  I'm a Christmas procrastinator looking to reform.  :o)  Thanks for any advice or insight you are willing to share. - Sister K.