Date: July 23 (solar calendar)
Definition: Daeseo (大暑), which literally means "great heat," is the twelfth of the twenty-four seasonal sub-divisions, or solar terms, of the lunar calendar. The season includes "Jungbok" (中伏), which is one of the three summer seasons, "Chobok," "Jungbok" and "Malbok." It is also the fourth Gyeong Day (庚日) after "Haji," the summer solstice.