Foreign students on the morning of June 20, two days before Dano, one of Korea's three main traditional holidays that falls on May 5 in the lunar calendar, wash their hair in water mixed with leaves of the herb changpo (sweet iris) in the traditional Korean village of Yeungnam University in Gyeongsan, Gyeongsangbuk-do Province. On Dano, Koreans in the past conducted jesa (ancestral rites) to pray for a rich harvest and washed their hair with changpo-infused water based on the belief that it drives away ghosts and makes hair shiny.