The five seasonal festivals to drive out evil originate in Yin and Yang philosophy. The most important is the Double Ninth festival on September 9, the largest, single-digit odd number. Chrysanthemums, a medicinal herb, are used for purification in the 1,000-year-old longevity rituals; hence, the festival's name. A chrysanthemum-boy doll, Noh plays, children's sumo, and floss-adorned chrysanthemums. Discover how the Chrysanthemum Festival has taken on new significance during the pandemic.