The Nation's Longest Running Tribute to Trans-Siberian Orchestra Twelve Twenty-Four presents a high energy, full-scale, holiday rock orchestra concert featuring everyone’s favorite rock-edge holiday music as well as their own holiday creations. Twelve Twenty-Four includes a six-piece rock band, multi-piece string section, and a variety of vocalists. This dedicated group of performers work year-round to deliver a theatrical and memorable Christmas concert experience suitable for fans of all ages.