How long is Tet 2024?

Could you elaborate on the duration of Tet 2024? As a traditional Vietnamese holiday, Tet signifies the start of the lunar new year and is a time of reunions, feasting, and celebrations. It's a nationally observed holiday, deeply ingrained in Vietnamese culture. Given its importance, I'm curious to know the exact length of this festive period. Does Tet 2024 last for a few days, a week, or even longer? How is the duration determined? And does it vary from year to year? I'd appreciate a clear and concise explanation of the length of Tet 2024 and the factors that influence it.