It appears that UFC light heavyweight champion Jon Jones will be meeting Dan Henderson on September 1st. The card hasn't been announced yet, but would likely be called UFC 151 based on currently scheduling. MMA Fighting relays the info:
UFC president Dana White said that the organization was targeting an early September date for the UFC light-heavyweight champion's next title defense, likely on Labor Day weekend.
Jones is coming off his third straight successful title defense, defeating Rashad Evans by unanimous decision at UFC 145 last month. Henderson hasn't competed since he picked up a narrow victory in a war with Mauricio "Shugun" Rua last November at UFC 139. He had been sitting out in hopes of getting a title shot, and it was granted shorty after Jones defeated Evans.