Tet, also known as the Vietnamese Lunar New Year, is a significant cultural celebration. During Tet, it is customary to visit family and friends, exchange gifts, and offer well wishes for the upcoming year. Traditional customs include cleaning the house, preparing special dishes, and displaying ancestral altars. However, it is important to avoid certain actions during Tet, such as arguing or speaking ill of others, as it is believed to bring bad luck. Additionally, it is considered inappropriate to wear black or white clothing, as these colors are associated with mourning.