The Mid-Autumn Festival, also known as the Moon Festival, Zhongqiu Festival, or in Chinese, Zhongqiujie (traditional Chinese: ), is a popular harvest festival celebrated by Chinese people and Vietnamese people (even though they celebrate it differently), dating back over 3,000 years to moon worship in China's Shang Dynasty.[1][2] It was first called Zhongqiu Jie (literally "Mid-Autumn Festival") in the Zhou Dynasty.[3] In Malaysia, Singapore, and the Philippines, it is also sometimes referred to as the Lantern Festival or Mooncake Festival. The Mid-Autumn Festival is held on the 15th day of the eighth month in the Chinese calendar, which is usually around late September or early October in the Gregorian calendar. It is a date that parallels the autumnal equinox of the solar calendar, when the moon is supposedly at its fullest and roundest. The traditional food of this festival is the mooncake, of which there are many different varieties. The Mid-Autumn Festival is one of the few most important holidays in the Chinese calendar, the others being Chinese New Year and Winter Solstice, and is a legal holiday in several countries.