Any time after Twelfth Night.
Mine are coming down this afternoon ... I'm gonna miss all my lights! I love having twinkly sparkly lights.
Maybe I can pretend my place is a Mexican restaurant, and leave them up!
ETA: when we were growing up, Mama Isabella always had the tree down on December 26. I was born on the 27th*, and she didn't want me feeling like my birthday was lost in the holidays.
*Interesting story as to why ... Mama Iz had a pre-delivery check-up in mid-December, and the doctor told her that she was ready to go any time. So she and my father had Christmas, got everything done, and went in to have me induced before the year ended ... for the tax write-off.