Halloween is a holiday celebrated on October 31st. The most common colors of the day are orange and black. Halloween comes from the ancient Celtic festival Samhain.
The ancient Celts believed that on October 31st, now known as Halloween, the boundary between the living and the deceased is not clear, and the dead become dangerous for the living by causing problems such as sickness or damaged crops.
On Halloween, the ancient Celts would place a skeleton by their window to represent the dead. Believing that the head was the most powerful part of the body, containing the spirit and knowledge, the Celts used the "head" of the vegetable to decorate their houses.
On this day people often wear strange clothes as characters in horrible novels or movies to frighten others.
People usually like to dress as ghosts, skeletons, or witches. Now Halloween is an official holiday in almost all European countries.

Tet is a national and family festival. It is an occasion for every Vietnamese to have a good time while thinking about the last year and the next year. At Tet, spring fairs are organized, streets and public buildings are brightly decorated and almost all shops are crowded with people shopping for Tet. At home, every is tidied, special food is cooked,offerings of food, fresh water, flowers and betel are made on the family altar with burning joss- sticks scenting the air. First-footing is made when the lucky visitor comes and children are given lucky money wrapped in a red tiny envelope. Tet is also a time for peace and love. During Tet, children often behave well and friends, relatives and neighbors give each other best wishes for the new year.