Date: August 17 (solar calendar), or July 7 (lunar calendar)
Definition: "Chilseok" (七夕), which literally means "the night of sevens," falls on the seventh day of the seventh month of the lunar calendar. The day celebrates the legend of the annual encounter between Gyeonu (牽牛星) and Jiknyeo (織女星), the planets situated at the two furthest ends of the galaxy.