i was doing business with a company in Rio de Janiero a few years ago. I was calling in May, and the music they played while you were on-hold was Christmas music.
I keep my Christmas tree and decoration up until the feast of the Ephiphany, January 6. In olden days, the Christmas season lasted 40 days (from the birth of the baby Jesus till the time he was presented in the temple)...There is a church in Camden, NJ that still has its tree up and will take it down on February 2 (Candlemas Day). So Feb 2 is my vote!