Đáy River
The Day River is a river in Vietnam. It was formerly known as Sông Hát or Hát Giang. The river is a distributary of the Red River, draining into the Gulf of Tonkin.
The river has a length of 240 km and has a drainage basin of more than 7,500 km², flowing through Hanoi, and the provinces of Hòa Bình, Hà Nam, Ninh Bình and Nam Định.
