1, time is different: Tomb-Sweeping Day gas is generally around April 5 of the Gregorian calendar, that is, the15th day after the vernal equinox; The day before the Cold Food Festival in Tomb-Sweeping Day.

2, the origin is different:? Tomb-Sweeping Day began in the Zhou Dynasty and has a history of more than 2,500 years. The Cold Food Festival is in the Spring and Autumn Period, commemorating the famous minister of Jin State in the Spring and Autumn Period.

3. Different customs: Tomb-Sweeping Day has been celebrating the Cold Food Festival since the Qing Dynasty, and the customs are mainly grave-sweeping and sacrificial activities; Since the Tang Dynasty, the custom of the Cold Food Festival has been to ban smoking and eat cold food at home, and to establish the custom of sweeping graves among the people in the form of decrees.

The Cold Food Festival, also known as "No Smoking Festival", "Cold Festival" and "Hundred Days Festival", is held on the 105th day after the winter solstice of the lunar calendar and one or two days before Tomb-Sweeping Day.

In ancient times, every early spring, the climate was dry, not only the kindling preserved by people was easy to cause fire, but also the occurrence of spring thunder was easy to cause mountain fires. Therefore, in this season, the ancients had to hold grand sacrificial activities, put out all the kindling handed down from the previous year, that is, "forbidding fire", and then re-drilling for fire, that is, "changing fire" or "inviting new fire". There is a certain time interval between banning fire and changing fire, and historical materials have different opinions such as three days, five days and seven days. During this period, people must prepare enough cooked food to live with cold food, which is called "cold food", hence the name "Cold Food Festival".