Tet is a national family festival, spring fairs are held, streets and public buildings are brightly decorated

Tet is a national family festival, spring fairs are held, streets and public buildings are brightly decorated, and almost all stores are crowded with Tet shoppers. Tet is also a time of peace and love. During Tet, children are usually healthy, friends, relatives, and family wish each other good new year wishes.
1) what festival is it
2) when does the festival take place?
3) what activitise do people often do in thí festival?
4) what food do people often eat ?
5) why do you enjoy it?