Tet Nguyen Dan, or simply Tet, is the most important and widely celebrated holiday in Vietnam. It is a lunar new year festival that usually takes place between late January and early February. During Tet, Vietnamese people engage in various traditional activities, such as cleaning their houses, cooking special foods, visiting their relatives and friends, and offering incense and flowers at the temples. It is also customary to give lucky money to children and to decorate the house with red and yellow ornaments. Overall, Tet is a time of joy, happiness, and renewal, and it reflects the unique cultural identity of the Vietnamese people.