The Co Loa Festival is held annually from the 6th to the 16th of the 1^st month of lunar calendar. It takes place in the pagoda that honours An Duong Vuong in Co Loa Commune, Dong Anh District, Hanoi City.

On the 6^th day of Tet, the literature procession is preceded by a flag that symbolizes the 5 elements (metal, wood, water, fire and earth), a musical company, and a sacrifice.

The Literature Stand set at the Imperial Court's Sedan Chair is shaded by a parasol. In the courtyard, one can see many colorful festival flags and Dai Flags (great ones) fluttering in the wind.On either side of the temple gates are a couple of red horses and white horses with colorful saddles.

Preceded by the literature procession is a sacrificial ceremony that lasts until 12 PM. After this ceremony, there is the god procession of 12 villages. Besides these processions, there are many activities such as swinging, rice cooking, singing Vietnamese popular opera and other events.

On the 16^th day of the first lunar month, the festival is closed with a thanksgiving ceremony.