The Mid-Autumn Festival, aka. Moon Festival, is a harvest festival celebrated by ethnic Chinese and Vietnamese people. The festival is held on the 15th day of the 8th month of the lunar calendar with full moon at night, corresponding to late September to early October of the Gregorian calendar with a full moon at night. The most famous Mid-Autumn Festival story is Chang’e flying to the Moon. Before Chang’e flying to the Moon, there is another story that you should know first.