"Christmas has gone back to Banada" at my house.
This was an expression used in our family when I was a child. The reference relates to the day when the Christmas tree, and associated Christmas decoration are taken down indicating the official end of the Christmas season. As you can imagine, this was not a happy experience for me as a young child who, like all kids, wanted to have Christmas last all year long. Fortunately, in my family, we were usually often late in this tradition. We would always delay this date until after "Little Christmas" - January 6th - the Feast of the Epiphany, the day Christmas is celebrated in the Greek Orthodox Church. Depending on the timing, this meant that the tree may stay up until 12-13th of January. This year, the trip to Banada was January 10th.
The best I can tell from a Google search, Banada refers to the ruins of an ancient abbey dating back to the 15th Century located in County Sligo, Ireland. This figures since my maternal grandparents were all born in Sligo. But other than that, I am not sure of the true meaning of this expression.
But, unlike the days of my youth, I don't take all of the Christmas decorations down at the same time. In fact, I usually leave the window decorations and the ones on the porch up until....Lent? Easter? In any case, it will be months.
I guess I've never really grown up...