清明 is a traditional Chinese festival (Qingming Festival, also called Tomb-Sweeping Day) that falls around April 5th each year. On this day, families visit ancestral graves to clean them, make offerings, and pay respects. The word can also describe clear and bright weather, especially in spring. It is culturally significant and tied to filial piety — you'll hear 清明 in weather forecasts, holiday announcements, and discussions of ancestor worship.