重阳节是农历九月初九，用英语说是the Double Ninth Festival。

The Double Ninth Festival, known in English as Chongyang Festival, is a traditional Chinese holiday celebrated on the 9th day of the 9th month in the lunar calendar. This date holds significant meaning as the numbers nine represent longevity and fortune in Chinese culture, making the festival a time to honor elders and appreciate the beauty of nature. The festival is also known as the "Old People's Festival" in modern times, reflecting a growing emphasis on respecting and caring for the elderly.

Traditionally, people celebrate the Double Ninth Festival by climbing mountains, which is believed to bring good health and longevity. It is also customary to wear茱萸 (zhūyú), a type of herb, or carry it in a pouch to ward off evil spirits and diseases. Another important tradition is to drink chrysanthemum wine, which is said to have medicinal properties and promote health. Eating chrysanthemum-related foods, such as rice cakes and dumplings, is also a common practice.

The festival is a time for family reunions and outdoor activities, as the autumn weather is generally pleasant. It is an opportunity for people to connect with their loved ones, enjoy the autumn scenery, and reflect on the importance of family and health. The Double Ninth Festival, with its rich cultural significance and joyful traditions, continues to be a cherished part of Chinese heritage.