Sixty-one in the first half and eighty-three in the second half. Why?

The so-called six twentyones in the first half and eight twentythree in the second half means: 65438+10-June is the first half; July-65438+February is the second half year. Every 6th and 2 1 day in the first half of the year must be a solar term, and the 8th and 23rd of each month in the second half of the year are a solar term. There is usually a difference of one or two days. (all are Gregorian calendars)

Twenty-four solar term song

The spring rain shakes the spring and the valley days, and the summer is full of mountains and summers.

Autumn dew, autumn frost, little snow in winter and cold in winter.

The two festivals remain unchanged every month, with a maximum difference of one or two days.

The first half of the year is June 2 1 day, and the second half is August 23.

Spring: beginning of spring, Rain: Rain, Surprise: Surprise, Spring: Equinox, Sunny: Qingming, Valley: Grain Rain.

Summer: long summer, full: Xiao Man, awn: awn seed, summer: summer solstice, summer pass: light summer and great summer.

Autumn: beginning of autumn, location: summer, dew: white dew, autumn: autumnal equinox, cold: cold dew; Health, first frost.

Winter: beginning of winter, snow: light snow, snow: heavy snow, winter: winter solstice, slight cold: slight cold, severe cold.

Twenty-four solar terms are the product of ancient farming civilization. It occupies an extremely important position in the traditional farming culture of China. It is the product of long-term observation and research on astronomy and meteorology by ancient people in China, and it contains the long-standing cultural connotation and historical accumulation of the Chinese nation.

In the twenty-four solar terms, there are not only phenological changes between cold and summer, but also changes in temperature and rainfall. Through it, the ancients can intuitively and clearly understand the changing law of seasonal climate in a year, so as to master the farming season and arrange farming activities reasonably. It not only plays a guiding role in agricultural production, but also affects the food, clothing, housing and transportation of ancient people, and even cultural concepts.