You want it to work all year long, that's the day you have to remove the tree.

It's time to remove the Christmas tree from your homes.

For many, keeping the tree for a long time brings bad luck during the year.

Supersticiouss think the decorations should be removed after the 12th Night, which corresponds to January 5th.

All of this is a theory of superstitious people, yet it would not be bad for you to follow their advice, since you never know.