The Cong people celebrate the Rooster Comb Flower Festival.

People bring rice, sticky rice cakes, roots, and fruits to the shaman's house for the communal village ceremony.

The Rooster Comb Flower Festival consists of both ceremonial and festive parts, signifying the end of the old year. It is held annually on the 15th day of the 10th lunar month, which is approximately November or December in the Gregorian calendar.

During the Rooster Comb Flower Festival, the offering ceremony takes place in the late afternoon, because according to the Cong ethnic group's beliefs, ancestors, the deceased, and deities only return home and to the village in the late afternoon or evening. On this day, the villagers offer rice, sticky rice cakes, and fruits and vegetables grown in the fields at the communal village ceremony. After the communal ceremony, families in the village begin offering sacrifices to their ancestors, presenting gifts to their deceased relatives. The rooster comb flower is a sacred flower that is indispensable in the ceremony, symbolizing both warding off evil spirits that destroy crops and serving as a spiritual bridge between family members and the deceased.

The village's communal ritual is held at the shaman's house in the late afternoon.

The Rooster Flower Festival is also an occasion for the Cong people to rest, have fun, and relax after days of hard work. It is a time for everyone to turn towards their roots, for children to express gratitude to their grandparents, parents, and ancestors; for villagers to thank each other for sharing joys and sorrows throughout the year; to thank heaven and earth, and the spirits... for blessing with favorable weather, bountiful harvests, good health, and to pray for good things for a peaceful and prosperous new year.

Source: https://baodienbienphu.com.vn/tin-tuc/van-hoa/210957/nguoi-cong-vui-tet-hoa-mao-ga