Chrysanthemums, sometimes called mums or chrysanths, are flowering plants of the genus Chrysanthemum in the family Asteraceae. They are native to East Asia and northeastern Europe. Most species originate from East Asia and the center of diversity is in China. Countless horticultural varieties and cultivars exist.

The Double Ninth Festival is a traditional Chinese holiday observed on the ninth day of the ninth month in the Chinese calendar. According to Wu Jun, it dates back to the Eastern Han dynasty.