September 2022 10. According to the calendar information, September 10 in 2022 is the Mid-Autumn Festival, and the lunar calendar date is August 15th, which is also Teacher's Day. The Mid-Autumn Festival evolved from the autumn festival in ancient times, popularized in the Han Dynasty, shaped in the early years of the Tang Dynasty, prevailed after the Song Dynasty, and was called the four traditional festivals in China together with the Spring Festival, Tomb-Sweeping Day and Dragon Boat Festival.