Every year the Biotzetik Basque choir of Boise, Idaho, USA performs at a special Christmas concert offering a selection of Basque songs, including Christmas carols. The video belongs to this year's concert, at St. Mary's Church, in Boise, last December 9 as a part of the "Gabon Onak: a Basque Christmas" program. 'Aintza Zeruan' is the Christmas carol. Zorionak!