Boat Race Festival is held in the summer, especially in lunar May and June in Phu Tho province, northern Vietnam.
In Bach Hac village of Viet Tri city, the Boat race is held on the 20th of the 5th lunar month annually. Bach Hac has 4 cycles of twelve years, namely Tien Hac, Dong Nam, Than Truc and Bo Dau. Each cycle owns a boat differently painted. Tien Hac is blue, Than Truc is red, Dong Nam is white and Bo Dau is yellow. Clothing, flags and oars must be of the same color with the boat. Each boat has 24 holds and is rowed by 48 boatmen and a person drumming on the wooden bell to conduct the boatmen. In the morning of the sacrifice party, boats sail from the gate of the Bach Hac Communal House to Tho Son ward, Viet Tri city. Afterwards, they are rowed backward to their starting point.
Dao Xa Boat race happens on the large Dao Lagoon. Legends said that one night, there were 2 imperial boats emerging from the bottom of the lagoon. Soldiers on the two boats shouted for joy. Ly Bon thought that enemy attacked. He, therefore, ordered his troops to fight. It was surprise that there was a person on the boat calling herself a water-nymph and saying that she came to help Ly Bon defeat the enemy. As a result, Dao Xa gets used to organizing the Boat race at night to sacrifice the water-nymph.