It is the most important and most celebrated holidays in Vietnam. Tet Nguyen Dan marks the first day of the first month according to Vietnamese lunar calendar. The name Tet Nguyen Dan can be translated as Feast of the First Morning.
 
The date of Tet Nguyen Dan falls in coincidence with Chinese New Year since their observance is based on lunar calendar. Usually, the celebration of Tet Nguyen Dan takes about 3 until 6 days. During these holidays, public services, shops, and restaurants are usually closed, and consumer prices tend to increase significantly.