Drinking Osmanthus Wine is the Mid-Autumn Festival.

The Mid-Autumn Festival, also known as the Moon Festival, Moon Festival, Moon Festival, Autumn Festival, Mid-Autumn Festival, Moon Worshipping Festival, Moon Lady's Festival, Moon Festival, and the Festival of Reunion, is a traditional Chinese folk festival. The Mid-Autumn Festival originates from the worship of heavenly phenomena, and evolved from the moon sacrifice on the autumn eve in the ancient times.

Originally, the festival was held on the day of the "Autumn Equinox" in the 24th solar term of the Dry Branches Calendar, and later it was transferred to the 15th day of the 8th month of the summer calendar, and there are some places where the Mid-Autumn Festival is held on the 16th day of the 8th month of the summer calendar. Since ancient times, the Mid-Autumn Festival has been characterized by folk customs such as offering sacrifices to the moon, enjoying the moon, eating mooncakes, playing with lanterns, enjoying osmanthus flowers, and drinking osmanthus wine, which have been passed down to the present day and are still going on today.

Customs:

There is a custom to worship the moon at Mid-Autumn Festival in Chaoshan, Guangdong Province, mainly for women and children, and there is a proverb that says, "Men don't worship the moon, and women don't worship the stove". There is also the local custom of eating taro in the Mid-Autumn Festival, Chaoshan has a proverb: "river and stream to the mouth, taro child food to". In August, it is the taro harvest, farmers are accustomed to taro to worship ancestors. Mid-autumn night burning tower is also very popular in some places.

Jiangnan folk in the Mid-Autumn Festival people customs are also diverse. Nanjing people love to eat moon cakes on Mid-Autumn Festival, must eat Jinling famous dish osmanthus duck. "Osmanthus duck" in the osmanthus fragrance when the market, fat but not greasy, delicious flavor. Jiangnan women are skillful, the poem in the aria, into the table delicacies. In Nanjing, people enjoying the moon together are called "celebrating the reunion", sitting and drinking together are called "full moon", and going out to the market is called "walking on the moon".

The above reference? Baidu Encyclopedia - Mid-Autumn Festival