qīng míng jié
The Qingming or Ching Ming Festival, also known as Tomb-Sweeping Day in English, is a traditional Chinese festival on the first day of the fifth solar term of the traditional Chinese lunisolar calendar. This makes it the 15th day after the Spring Equinox, either 4 or 5 April in a given year. Other common translations include Chinese Memorial Day and Ancestors' Day.
It is also a time for people to go outside to enjoy the spring such as having a picnic or flying a kite. In 2017 Qingming Festival falls on April 4. The three-day public holiday in China is April 3–5, 2017.