Original sentence: In 2009, the three day concert will be sponsored by three radio stations: The Hawk, rock station FM96 and country music station BX93.The concert will be held from July 23 to July 25, each radio station will sponser one day
Edited sentence: In 2009, the three-day concert will be sponsored by three radio stations: The Hawk, rock station FM96 and country music station BX93.The concert will be held from July 23 to July 25; each radio station will sponsor one day