From 7 o'clock to 23 o'clock. According to the inquiry of KFC official website, the business hours of the business district are from 7: 00 to 23: 00, and the business hours of the residential district are from 7: 00 to 22: 00. KFC is one of the multinational chain restaurants in the United States, and the second largest fast food and the largest fried chicken chain enterprise in the world.