1, different time: Tomb-Sweeping Day gas is generally around April 5 of the Gregorian calendar, that is, 15 after the vernal equinox; The day before Tomb-Sweeping Day Cold Food Festival.

2. Different places of origin:? Tomb-Sweeping Day started in the Zhou Dynasty and has a history of more than 2,500 years. The Cold Food Festival is held in the Spring and Autumn Period to commemorate the famous ministers of the State of Jin 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; The custom of the Cold Food Festival began in the Tang Dynasty, that is, smoking and eating cold food at home were banned, and the custom of sweeping graves was established among the people in the form of decrees.

Cold Food Festival, also known as "Smoke-free Festival", "Cold Food Festival" and "Hundred Days Festival", is held from the winter of the lunar calendar to the next day 105, 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 easily caused fires, but also the occurrence of spring thunder easily caused mountain fires. Therefore, in this season, the ancients should hold a grand sacrificial ceremony, put out all the kindling handed down from the previous year, that is, "forbidding fire", and then drill for fire again, 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 on cold food, which is called "cold food", hence the name "Cold Food Festival".