Dadri fair is one of the second largest fairs of India. The fair site is located at a distance of about 3 km from bus stand of Ballia city. The fair is held here annually starting from Kartik Purnima (October-November) in the honour of Dadar Muni, the disciple of Rishi Bhrigu. It is believed that he brought the River Saryu up to Ballia on the order of his Guru. This event is celebrated over a period of one month with lots of celebrations. The fair is organized in two phases. During the first phase a cattle fair is organized at Nandigram which starts 10 days before the Kartik Purnima. And later on the day of Kartik Purnima, Meena Bazaar having shops of different items, with many amusement facilities & various cultural programs are organized which last for one month.