While you’d think the right time to put up your Christmas tree is a personal decision, many people have opinions on the subject. But there is some historical evidence on when it would make the most sense.

Many have adopted the “12 Days of Christmas” approach, trimming the tree in mid-December to go along with the song. Queen Victoria’s husband Prince Albert brought the modern-day Christmas tree tradition back from Germany in the 1840s. Following their lead, you’d put up the tree on Christmas Eve. Australia aims for the second week of November, right after Adelaide Pageant Day, but if you ask Miss Manners, a Christmas tree before December would be a faux pas. Italy chooses to listen to that warning, with the tree going up during the first week of the month. When do you put up the tree? How about taking it down?