(worldkings.org) Tết, or Vietnamese New Year, is the most important celebration in Vietnamese culture. The word is a shortened form of Tết Nguyên Đán, which is Sino-Vietnamese for "Feast of the First Morning of the First Day".
(Worldkings)Tết Nguyên Đán, more commonly known by its shortened name Tết, is the most important and popular holiday and festival in Vietnam. It is the Vietnamese New Year marking the arrival of spring based on the Lunar calendar. The name Tết Nguyên Đán is Sino-Vietnamese for Feast of the First Morning.