Google China Logo -Mid Autumn Day 中秋节
The Mid-Autumn Festival, also known as the Moon Festival, or in Chinese, Zhongqiu Jie (traditional Chinese: 中秋節), is a popular harvest festival celebrated by Chinese people, Japanese people (Tsukimi festival in Japanese), Koreans (Chuseok festival in Korean), and Vietnamese people (even though they celebrate it differently), dating back over 3,000 years to moon worship in China's Shang Dynasty. It was first called Zhongqiu Jie (literally "Mid-Autumn Festival") in the Zhou Dynasty. 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 autumn and spring Equinoxes of the solar calendar, when the moon is supposedly at its fullest and roundest.
中秋节起源于中国，是东亚民间的一个传统节日，为每年农历的八月十五。中秋节不单单是华人的节日，受中华文化的影响，中秋节也是日本、越南、朝鲜半岛等地的传统节日。
按照中国的农历，八月为秋季的第二个月，古时称为仲秋，因此民间称为中秋，又称秋夕、八月节、八月半、月夕、月节，又因为这一天月亮满圆，象征团圆，又称为团圆节。
via wiki
