Sonepur, Bihar At the time of the Kartik Poornima, cattle fairs are also held at Sonepur, in Bihar and at Bateshwar and Mukteshwar in the state of Uttar Pradesh. One of the largest cattle fairs in the country is held at Sonepur. At this month-long fair there is a lot of trade in cattle. Cows and oxen are coloured bright shades of red, yellow and purple. Their horns are gilded. The sound of their bells and the trumpeting of elephants add to the glamour of the fair.