Poll Results

Total votes: 708

I don't have any: 191 (27.0%)
December 26 (Boxing Day): 2 (0.3%)
Some time before New Year: 45 (6.4%)
A day or two after New Year: 123 (17.4%)
The traditional end of the season, Twelfth Night (January 5 or 6): 192 (27.1%)
I usually get round to it some time later in January: 109 (15.4%)
February or later!: 21 (3.0%)
Easter, specifically: 1 (0.1%)
The decorations stay up all year round: 24 (3.4%)

One person wrote in, "Typically sometime around the first weekend after New Year", and another wrote, "The traditional end of the season, Candlemas (February 2)".

I included Easter as an option because that was what my grandparents always did. The Christmas decorations would go up on Christmas Eve, no earlier, and stay up until Easter. They claimed it was traditional and the correct way to do it, and complained loudly that anyone who did differently was doing it wrong. They claimed this was the tradition in Germany, where they came from, however I've never heard of anyone else honouring this "tradition" before. So I have no idea where they really got it from.