1. As a result of being calculated by the lunar calendar, Tet often occurs at the end of January, which is later than the New Year's Day.
2. It usually lasts for over 10 days from December 28 in the lunar calendar.
3. According to the tradition, the families visit their father on the first day of the lunar new year
4. according to the tradition, people visit their teachers on the third day of the lunar new year