Three days before Qingming and three days after Qingming refer to those three days.

Tomb-Sweeping Day: The first three days, that is, the first three days are: Gregorian calendar: April 1, 2, 3.

At the turn of mid-spring and late spring, Tomb-Sweeping Day recorded in the almanac that "on the fifteenth day after the vernal equinox, the bucket refers to Ding, which is used for Qingming. When everything is clean and clear, everything is clear and clear, hence the name."

Tomb-Sweeping Day, Spring Festival, Shangyuan Festival, Dragon Boat Festival, Zhongyuan Festival, Mid-Autumn Festival, Winter Solstice and New Year's Eve are collectively called the "eight major festivals of the year" of the Chinese nation.

Historical background:

In ancient times, there were Shangsi Festival and Cold Food Festival before Tomb-Sweeping Day. Because the three festivals, Shangsi, Cold Food and Qingming, are close to each other, and their customs permeate and overlap with each other, there is no obvious division gradually, thus forming the present Tomb-Sweeping Day.

There is a folk saying, "On February 2nd, the dragon looked up, and on March 3rd, I saw Xuanyuan." Shangsi Festival was originally a festival to commemorate Xuanyuan Huangdi, the ancestor of mankind. It is set on the fourth day of the first day of the third lunar month every year, and it will be fixed on the third day of the third lunar month after Wei and Jin Dynasties.

Tomb-Sweeping Day gas point: Dou refers to B; The solar calendar is15; Gregorian calendar April 4-6. The "Twenty-four solar terms" were originally determined by the direction of the top of the bucket handle of the Big Dipper. The bucket handle starts from the "female" position and then rotates clockwise. When bucket handle points to the "second position", it is the spirit of Qingming.

From the Han Dynasty to the early Qing Dynasty, the solar terms were divided by the "average time method", and the period from winter solstice to winter solstice of the following year was divided into 24 segments (each segment was 15 days), with winter solstice as the starting point of the "24 solar terms"; Tomb-Sweeping Day Qi is counted from the winter, that is, the first 105 day after winter. The current "twenty-four solar terms" come from the "fixed air method" concluded more than 300 years ago (used since 1645), which is determined according to the position of the sun on the ecliptic. When the solar calendar reaches 15, it is the node of Tomb-Sweeping Day.

By the Qingming Festival, the climate in Huangjijiao and its vicinity has been refreshing and warm, and the land presents a quiet scene in spring. "Qingming" means that the climate is warm, plants sprout, apricot flowers and peach blossoms are in full bloom, giving people a fresh, clear and prosperous feeling everywhere.

"Huainanzi Astronomical Training": "On the fifteenth day after the vernal equinox, the bucket refers to B, then the Qingming wind will arrive"; The "Qingming wind" in the article is a refreshing and clear wind. At the age of 100, I asked, "When everything grows, it is pure and bright, so it is called Qingming." "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."