The Khmer people have a population of about 1,260,600 people. They mostly live in the provinces of Mekong Delta. Their language belongs to the Mon-Khmer group. In addition, the Khmer is one of the 24 Vietnamese ethnic groups that have their own writting system. The system dates back about a thousand years. The Khmer are experenced farmers. They grown rice, raise cattle and poultry, make sugar for living. They have 2 main holiday: Chaul Chnam Thmey (New Year) and Greeting-the-Moon festival. The latter, which is also called Ok Om Bok, is hold to thank the Moon for favourable weather and a good harvest as well as to wish for the next successful crop