A well-known poem by Tang dynasty poet Du Mu tells of a scene in early April: "Rains fall heavily as Qingming comes, and passersby with lowered spirits go." This scene takes place on Tomb Sweeping Day, also known as Qingming Festival. Tomb Sweeping Day is a traditional Chinese festival. Tomb Sweeping Day is a traditional Chinese festival. It began in the Zhou dynasty, over 2, 500 years ago. Chinese people celebrate it to remember and honor their ancestors . This year, it falls on April 4. Tomb Sweeping Day became a public holiday in the Chinese mainland in 2008. People have one day off for that day. On this day. families bring flowers, food and wine to the grave sites  of their ancestors. They place cakes, fruits in front of the grave and some may bum joss paper as money for the dead. After that, they sweep the tombs and cherish  the memories of their dead family members. Tomb Sweeping Day gives us a chance to show respect to our ancestors and family members who have passed away and show that we miss them. This tradition shows that family values are an important part of Chinese culture. Tomb Sweeping Day is also the beginning of the time for gardening and outdoor activities in China. Families often get together for outings or to fly kites at this time. What does the passage mainly discuss?
People bring many things to the grave site. Du Mu wrote a poem about Qingming Festival. Tome Sweeping Day is a traditional Chinese festival. Qingming Festival is a good time for outdoor activities.