Valentine's Day, also known as Saint Valentine's Day, is one of the traditional western festivals on February 14 every year. Lovers send chocolates, cards and flowers to each other on this day to express love or friendship, holiday cultural dates, gifts and love songs. Today, people like to express their feelings on Valentine's Day. Valentine's cards are usually painted with Cupid, just like an arrow hitting the heart. "In the United States, in the 1980 s, diamond dealers began to promote Valentine's Day jewelry. There are two categories of Valentine's Day gifts: chocolate and flowers, and there are more jewels in this category. Generally, on Valentine's Day, red roses are presented to express the feelings between lovers. Chocolate may be an indispensable thing for Valentine's Day. Men use chocolate to express their deep love for things on Valentine's Day. It makes people feel happy.