The festival during which Vietnamese people prepare special rice cakes called Banh Chung is Tet, the Lunar New Year celebration. This important holiday celebrates the arrival of spring and honors ancestors. Families gather to make Banh Chung, square-shaped sticky rice cakes filled with mung bean and pork, symbolizing gratitude and love. Alongside other traditional dishes, the festivities include offerings to ancestors, fireworks, and cultural performances, fostering a sense of unity and renewal in Vietnamese communities.