When was the four-piece indie rock band, that joined The Killers on the Christmas song ¡Happy Birthday Guadalupe! formed?
¡Happy Birthday Guadalupe!: "¡Happy Birthday Guadalupe!" ¡Happy Birthday Guadalupe!:  is a Christmas song by Las Vegas rock band The Killers featuring Wild Light and Mariachi El Bronx, released as a digital download on December 1, 2009. Wild Light: Wild Light was an American four-piece indie rock band from New Hampshire, United States, composed of multi-instrumentalists/vocalists Tim Kyle and Seth Pitman, guitarist/vocalist Jordan Alexander, and drummer Seth Kasper. Wild Light:  The band formed in 2005 and released its first full-length album, "Adult Nights", in March 2009.
2005