Many coming-of-age ceremonies are to acknowledge the passing of a girl through puberty, when she experiences menarche, or her first menstruation. The traditional Apache coming-of-age ceremony for girls is called the na'ii'ees (Sunrise Ceremony), and takes place over four days. The girls are painted with clay and pollen, which they must not wash off until the end of the rituals, which involve dancing and rituals that challenge physical strength.