When is the Mid-Autumn Festival?
A.
The festival is held on the 15th day of the 10th month of the lunar calendar .
B.
The festival is held on the 25th day of the 8th month of the lunar calendar .
C.
The festival is held on the 15th day of the 8th month of the lunar calendar .
D.
The festival is held on the 15th day of the 8th month of the Solar calendar .