When do they go to the pagoda

Choose the letter A, B, C or D to answer these following questions

Charles is twelve years old. He lives in a modern villa in the suburb of the city. His father is a manager. His mother is a secretary. And he is a student. The villa is next to a large shopping center so it’s very convenient. There is a big backyard where they can sit and have afternoon tea. His mother often buys some flowers because there is a flower shop opposite their house. At Tet, they often go to the historic pagoda near their villa.

Question:When do they go to the pagoda?