Also known as Happy Mooncake Festival!
Either way, a happy, happy, happy festival!
Background (Taken from Wikipedia):
The Mid-Autumn Festival (traditional Chinese: 中秋節; simplified Chinese: 中秋节; pinyin: zhōngqiū jié; Vietnamese: Tết Trung Thu) is a popular harvest festival celebrated by Chinese and Vietnamese people. The festival is held on the 15th day of the eighth month in the Chinese calendar, during a full moon, which is in September or early October in the Gregorian calendar, close to the autumnal equinox. The Government of the People's Republic of China listed the festival as an "intangible cultural heritage" in 2006, and it was made a Chinese public holiday in 2008. It is also a public holiday in Taiwan. Among the Vietnamese, it is considered the second most important holiday tradition.