To the Vietnamese people, Tết Nguyên Đán (Lunar New Year's Day) is very sacred. The Tết season usually falls on either the second half of the first calendar month, or the early days of the second calendar month of the year. This is the time when family members together make food, fruit and incense offerings on the family altars to commemorate their ancestors. This is also the time for people to visit their neighbours, their friends and relatives. During the first three or four days of Tết, any visitor who is the first visitor to one's house to offer Tết greetings would be considered as the first visitor for the year (Xông đất). Their good or bad luck would have a strong effect on the house owner's business success for the coming year. The belief of Xông đất remains very strong nowadays, especially among business people. Tết days are always regarded as a perfect time for people to enjoy traditional food such as bánh chưng, a square-shaped sticky rice cake, the fragrance of which alone could strongly provoke one's sense of nostalgia for Tết