For Native Americans, August marks the season of Wilhoon, the season marking the salmon runs of late summer; the Hopi Snake Dances, marking a sixteen-day ritual of purification; the Stomp Dance, performed by Seminole and other Oklahoma tribes as a time of renewal and purification; the Sun Dance, observed by Plains peoples (Arapaho, Cheyenne, Shoshone, Arikara, Crow, Sioux, and others) as a time of penitence and sacrifice; and the Iroquois Green Corn Ceremony, a time of renewal involving dances, fasting, offerings, and readings from the code of Handsome Lake.