When does sign of the chrysanthemum take place?

"The Sign of the Chrysanthemum" is a historical novel by Katherine Paterson, set in 12th century Japan. The story follows a young boy named Muna who goes on a journey to find his father, a famous samurai. The events in the novel take place during the Heian period, a time of great cultural and artistic development in Japan. The title refers to the chrysanthemum, which is a symbol of the imperial family in Japan and represents longevity and rejuvenation.