How about sweeping the grave on April 4th?

The Gregorian calendar is Tomb-Sweeping Day from April 4th to 6th every year, which is one of the important traditional folk festivals in China. In 2006, it was included in the first batch of national intangible cultural heritage list. In 2008, it was officially established as a legal holiday. Tomb-Sweeping Day started in the Zhou Dynasty and has a history of more than 2,500 years.

Grave-sweeping is called "respect for time thinking" for ancestors. Its customs have a long history. The Ming Dynasty's "A Brief Introduction to the Scenery of the Imperial Capital" reads: "In March, in Tomb-Sweeping Day, men sacrificed their ancestors in Qingming Festival, and the road was full of embarrassment. Worshipers, mourners, weeping, weeding, adding soil to graves, burning ingots several times, and buying graves with paper money. If you can't see the paper money, it will be a lonely grave. After crying, don't go back, go to the fragrant tree, choose the garden, and sit down and get drunk. " In fact, grave-sweeping began before Qin Dynasty, but not necessarily during Tomb-Sweeping Day, but after Qin Dynasty. It was not until the Tang Dynasty that it became popular.