There is spring break every year. How is it calculated?

Da Chun is the common name of beginning of spring, calculated according to the ecliptic. When the bucket handle of the Big Dipper points to Yin Shi, it is the solar term in beginning of spring, that is, when the sun reaches longitude 3 15.

When the solar cycle begins in spring, the area south of this line has the smell of spring. Early spring is a solar term with a slight turning point, which is not obvious in the whole country, but the number of days of growth after early spring means that the coldest period has basically passed, the weather has gradually warmed up and everything has gradually recovered. In Lingnan, the breath of early spring comes to my face; In the north, early spring is a prelude to spring more than spring.

Spring plate is Da Chun's food: mainly vegetables, lettuce, melons, fruits, cakes and sugar are put on the plate to entertain relatives and friends or eat during the Spring Festival. There are five kinds of dishes: fruit, vegetables, candy, cake and bait. Vegetables mainly include: bean sprouts, radishes, leeks, spinach, lettuce, beans, eggs and shredded potatoes. Du Fu's "beginning of spring": "In spring, the lettuce in the spring vegetables is fine, and I suddenly think of the time when Beijing plum blossoms."