Original sentence: The Double Ninth Festival  (Chong Yang Festival or Chung Yeung Festival in China, Hong Kong, and Taiwan, , Jungyangjeol (Hangul: 중양절, Hanja: 重陽節)), ),  observed on the ninth day of the ninth month in the Chinese calendar, is a traditional Chinese holiday, mentioned in writing since before the Eastern Han period (before AD 25)
Edited sentence: The Double Ninth Festival  (Chong Yang Festival, Chung Yeung Festival, ChóngyángJié () in China, Hong Kong, and Taiwan, , Jungyangjeol (Hangul: 중양절, Hanja: 重陽節)), observed on the ninth day of the ninth month in the Chinese calendar, is a traditional Chinese holiday, mentioned in writing since before the Eastern Han period (before AD 25)