Phu Day Temple is located in Kim Thai Commune, Vu Ban District, Nam Dinh Province. From Nam Dinh City, one can reach Phu Day by car for 15 km. One can also reach it by train. The station is two kms from the temple.

The temple is dedicated to Holy Mother Lieu Hanh who is one of four immortal gods in the Vietnamese pantheon. The legend of Holy Mother Lieu Hanh is sung from one generation to another throughout the country, from the north to the south, from the delta regions to the mountainous areas of the country. It was believed that Phu Day was in the center of the homeland.

In the minds of Vietnamese people, the Hung kings are the ancestors, Holy Mother Lieu Hanh is the mother and General Tran Hung Dao is the father. The Vietnamese community is considered a family that has the same ancestors, father and mother.

Phu Day Festival is held every year from the 1st to the 10th day of the third lunar month, but the main day of the festival occurs on the 3rd. On the 6th day, people organize a procession that escorts "the Mother" from Tien Huong Temple to Goi Pagoda and a festival in which people stand in the shape of Chinese Characters on the 7th day. Those are the most typical activities of the festival.