The Wren Song is sung in Ireland during Wren Day on 26 December. The song is sung by "wren boys" who raise money while parading around a town or village.
The Wren Song is sung most often on Wren Day, which occurs on the day after Christmas, or 26 December. The celebration first started as an ancient pagan tradition of animal sacrifice that has been passed down though various Celtic cultures and is now celebrated across Ireland and the Isle of Man.
On Wren Day, "Wren Boys" in Ireland meet to parade, often with a holly bush decorated with wrens, and sing the Wren Song. The boys make straw costumes to wear, and their leader's costume depicts a horse known as the hobby horse. The song is sung as the Wren Boys parade around a real or fake wren and ask for money and donations.
There are many versions of the Wren Song, but one of the most common goes as follows: