The Day River (Vietnamese: Sông Đáy) is a river in Vietnam. It was formerly known as Hát River (Sông Hát or Hát Giang) or Gián Khẩu River (Sông Gián Khẩu). The river is a distributary of the Red River, draining into the Gulf of Tonkin.

Đáy River
Day River through Ninh Phúc Port
Location
Country	Vietnam
Region	Hà Nội, Hòa Bình, Hà Nam, Ninh Bình and Nam Định
Physical characteristics
Source
• location	Geladaindong Peak, Tanggula Mountains, Qinghai (Đan Phượng)
• elevation	5,042 m (16,542 ft)
Mouth
• location	Đáy Mouth, Kim Sơn
• elevation	0 m (0 ft)
Length	240 km (150 mi)

The river has a length of 240 km[1] and has a drainage basin of more than 7,500 km²,[2] flowing through Hanoi, and the provinces of Hòa Bình, Hà Nam, Ninh Bình and Nam Định.

See also

• Kẽm Trống Bay

References