What's the difference between Tomb-Sweeping Day and Tomb-Sweeping Day?

The difference between Tomb-Sweeping Day and Tomb-Sweeping Day: Tomb-Sweeping Day gas is a period of time, generally referring to 15 days, while Tomb-Sweeping Day is only one day, and the day when Tomb-Sweeping Day gas starts is called Tomb-Sweeping Day.

Tomb-Sweeping Day is one of the 24 solar terms in China. After the vernal equinox and before Grain Rain, the sun on the Yellow Meridian reaches 15, and one of the three days on April 4-6 in the solar calendar is a solar term. "Almanac": "On the fifteenth day after the vernal equinox, the bucket refers to Ding, which is used for Qingming, when everything is clean and bright, and when it is covered, everything is clean and bright, hence the name."

Because the 24 solar terms objectively reflect the changes of temperature, rainfall and phenology throughout the year, ancient working people used them to arrange agricultural activities.

Tomb-Sweeping Day originated from the "Tomb-Sweeping Day" in the 24 solar terms and is an important traditional folk festival in China. Tomb-Sweeping Day, Spring Festival, Dragon Boat Festival and Mid-Autumn Festival are also called the four traditional festivals in China.

Besides China, some countries and regions in the world have also visited Tomb-Sweeping Day, such as Viet Nam, South Korea, Malaysia and Singapore. The traditions of Tomb-Sweeping Day and China in these countries are both similar and different.

Clear climatic characteristics

Tomb-Sweeping Day gas and East Asian atmospheric circulation change from winter to spring. The ridge of westerly belt moves frequently, and the low-level high and low pressure appear alternately. The temperature in the Jianghuai area changes greatly, and unstable precipitation such as thunderstorms gradually increases.

Rainfall in the middle and lower reaches of the Yangtze River increased significantly. Except for the eastern coast, the average rainfall in April in most areas of the south of the Yangtze River is above100 mm. Due to its geographical location near the ocean, South China began to experience heavy precipitation when it was affected by the front formed by the intersection of cold and warm air, which is called the pre-flood season in South China.

When the thermal convection in the rain belt develops vigorously, there will be strong convective weather such as thunderstorms. "It rains in succession during the Qingming Festival" refers to the climate characteristics of the south of the Yangtze River. At this time, it is often cloudy and sunny, which is prone to wet stains and rainy days.

The temperature in northern China rises rapidly, precipitation is scarce, and it is dry and windy, which is the time of dusty weather in a year. In many northern areas, the average temperature in April reached 10℃- 15℃. The germination of vegetation in the forest farm coincides with the spring outing, grave sweeping and tree planting season, so it is very important to prevent forest fires.