The Mid-Autumn Festival, also known as the Moon Festival is a traditional Festival in Viet Nam what called Trung Thu. Its original was from China and held on the August 15th of Lunar Calendar. That also called as Tet Nhi Dong ( Child Festival). The tradition activities for this festival was for children, enjoyed their main food that was moon cake and fruits. Chinese people often played the Dragon Dance in this festival, Vietnamese People played Lion Dance. Besides the moon cake, that is the lanterns. People hanged the lanterns out or inside their houses, children handed the lanterns and gather for playing. In this festival, people prayed the incense to their ancestors as well as flowers, fruits and the moon cake. For Chinese people: The Mid-Autumn Festival is one of the few most important holidays in the Chinese calendar, the others being Chinese New Year and Winter Solstice, and is a legal holiday in several countries. Farmers celebrate the end of the fall harvesting season on this date. Traditionally on this day, Chinese family members and friends will gather to admire the bright mid-autumn harvest moon, and eat moon cakes and pomelos under the moon together. Accompanying the celebration, there are additional cultural or regional customs, such as: - Carrying brightly lit lanterns, lighting lanterns on towers, floating sky lanterns - Burning incense in reverence to deities. - Erect the Mid-Autumn Festival. It is not about planting trees but hanging lanterns on the bamboo pole and putting them on a high point, such as roofs, trees, terraces, etc. It is a custom in Guangzhou, Hong Kong, etc. - Collecting dandelion leaves and distributing them evenly among family members. - Fire Dragon Dances. - In Taiwan, since the 1980s, barbecuing meat outdoors has become a widespread way to celebrate the Mid-Autumn Festival.

The Vietnamese has the legend of Cuội, whose wife accidentally urinated on a sacred banyan tree, taking him with it to the Moon. Every year, on the mid-autumn festival, children light lanterns and participate in a procession to show Cuội the way to Earth.
One important event before and during Vietnamese Mid-Autumn Festival are lion dances. The dances are performed by both non-professional children group and trained professional groups. Lion dance groups perform on the streets go to houses asking for permission to perform for them. If accepted by the host, "the lion" will come in and start dancing as a wish of luck and fortune and the host gives back lucky money to show thankfulness.
Vietnamese people nowadays take the advantage of Trung Thu for offering gifts to their colleagues, friends and family or for their business relationship. Many moon- cake shops were set up almost a month before the Mid Autumn Date.