The Cold Food Festival is usually from winter to the next day 105. The days near Tomb-Sweeping Day. Before the calendar reform in Tang Ruowang in the early Qing Dynasty, Tomb-Sweeping Day was scheduled for two days after the Cold Food Festival. After the political reform in Tang Dynasty, Tomb-Sweeping Day was scheduled before the Cold Food Festival. The definition of modern 24-day holiday follows the definition of soup, so the Cold Food Festival is the second day in Tomb-Sweeping Day. After the founding of New China, many regions equated the Cold Food Festival with Tomb-Sweeping Day and celebrated it on the same day.

However, in most parts of Shanxi, the day before Tomb-Sweeping Day was the Cold Food Festival. Some places, such as Yushe County, celebrated the Cold Food Festival two days before Tomb-Sweeping Day. Yuanqu County also pays attention to Tomb-Sweeping Day's Cold Food Festival the day before, and the light cold food the day before.

"The child is evasive, and the mountain fire burns me. The four seas have the same cold food, and one person in a thousand years. " The poem "Cold Food Festival" by Lv Xiang, a poet in the Tang Dynasty, tells the origin of "pushing Mianshan to burn us" in the Cold Food Festival. According to legend, this custom originated from the commemoration of meson tui by Jin State in the Spring and Autumn Period.

At that time, Jie Zhitui and Jin Wengong Zhong Er were exiled to other countries, and cut thigh meat for Wen Gong to satisfy their hunger. After the restoration of Wen Gong, Zi Tui did not want to get rich, so he retired from Mianshan with his mother. Duke Wen burned the mountain for this reason, but Zi refused to go out of the mountain and died with his mother.

Duke Wen buried the body in Mianshan, built a temple, and ordered him to ban fire and cold on the day of his death to mourn, which later became a custom. China used to celebrate the Spring Festival at the Cold Food Festival until it was changed to Tomb-Sweeping Day. However, the Korean side still retains the tradition of holding the Spring Festival at the Cold Food Festival.

Before the calendar reform in Tang Ruowang in the early Qing Dynasty, Tomb-Sweeping Day was scheduled for two days after the Cold Food Festival. After the reform of the Tang family, the Cold Food Festival was held the day before Tomb-Sweeping Day. The definition of the modern twenty-four solar terms follows that of the Tang Dynasty, so the Cold Food Festival is the day before Tomb-Sweeping Day.

From the Spring and Autumn Period to the present, the Cold Food Festival has a history of more than 2,600 years. The story took place in Shanxi, China, and was set as the day before Tomb-Sweeping Day. On this day, the custom of eating cold food, offering sacrifices and having an outing has been handed down and accepted by the whole country. With the passage of time, the Cold Food Festival has quietly merged into Tomb-Sweeping Day, and the people represented by the Cold Food Festival have praised loyalty, honesty and political clarity for thousands of years. ?