Hung King Temple is a historical as well as cultural attraction of Phu Tho province. Along with this temple, local people have the Hung King temple festival, which is annually celebrated on 10^th March of lunar year. This festival has become one of the greatest national festivals of both local people and Vietnamese people. Working labors are allowed to have a day off on 10^th March.

On festival day, people from all over the country head for Nghia Linh Mountain, where the Temple is situated, to commemorate the Hung Kings, who established and developed the country of Van Lang at that time. The main festival day is 10^th, but visitors have moved to the temple during earlier days from 8^th to 10^th.

The festival has two main parts: the incense-offering ceremony and the recreational activities. The first one is held at the Upper Temple (Den Thuong) to represent the gratitude and respect of “Dragon and Fairy descendants” to their ancestors. The incense-offering rite will be conducted by the state representatives and the elderly after hearing the sound of the old bronze drum. The second part of the festival includes traditional and modern activities. The most remarkable activities are the Xoan singing performance in Upper temple and Ca Tru singing performance in Lower temple (Den Ha). Besides, there are other such interesting activities as cross-bow shooting, rice cooking, cock fighting, and dragon dancing.

Hung King Temple festival can be considered one of the most important and meaningful one that connect Vietnamese people from all over the country together. It enhances the national unity and reminds Vietnamese people of their origin and history.