Time: The 19th to the 22nd day of the second lunar month and the 25th day of the seventh lunar month. The main festival day is on the 19th day of the second lunar month. The festival is held in large-scale every 5-year.
Place: Duong Da Hamlet, Duong Xa Commune, Gia Lam District, Hanoi.
Objects of worship: Imperial concubine Y Lan.
Characteristics: Custom of “Phat co tong” (raising the flag of the canton).
The temple festival is held on the 19th day of the second lunar month and the 25th day of the seventh lunar month (it is said that this is the anniversary of her death). The festival involves water procession, worshipping ceremony, incense offerring. The offerrings are only vegetarian food. Especially, there is custom of raising the flag of the canton in oder to dispel dull cloud to make clear sky. Games in the festival: human chess playing, cock fighting, wrestling, cheo, tuong singing.