Introduction of six solar terms of autumn dew and autumn frost

1, beginning of autumn, Chushu, Bailu, Autumnal Equinox, Cold Dew, First Frost.

2. beginning of autumn is the 13 of the 24 solar terms. The bucket handle of the Big Dipper points to the southwest, and the sun reaches the longitude of the Yellow River 135. The festival is celebrated on August 7-9 in the Gregorian calendar every year. Beginning of autumn is the first solar term and the starting point of autumn. Autumn begins in the beginning of autumn and ends in beginning of winter, which is the result of celestial movement. Entering autumn means rain, storm, humidity, etc. At the turning point of the year, there is a downward or decreasing trend; In nature, everything begins to grow from lush to mature.

3. long summer is the 14th of the 24 solar terms. Dou Zhiwu (Southwest); The solar calendar is150; Celebrated on August 22-24 of the Gregorian calendar every year. Being in the heat is "out of the heat", that is, out of the heat. The arrival of the summer heat marks the end of the hot weather, and the summer heat gradually fades, from hot to cold. Due to the influence of short-term reheating weather (commonly known as "autumn tiger"), there is still a continuous high temperature after the summer heat, which is generally cool until after the Millennium.

4. Millennium is the 15th solar term in the "Twenty-four Solar Terms", and it is the end of the application of the month in the calendar and the beginning of the unitary month. When the sun reaches 165 degrees, it will cross the Gregorian calendar on September 7-9. Millennium is an important festival reflecting the temperature changes in nature, basically ending the sultry summer, and it is a turning point from sultry to cool in autumn. The ancients used four seasons with five elements, and autumn was golden and golden white, so white was used to describe autumn dew. After entering the Millennium solar terms, the summer monsoon is gradually replaced by the winter monsoon, and the cold air goes south in batches, which often brings a certain range of cooling.

The autumnal equinox is the sixteenth solar term among the twenty-four solar terms, and the time is usually from September 22nd to 24th in the Gregorian calendar every year. On the day of the autumnal equinox, the sun reaches the longitude 180 (autumnal equinox), almost reaching the equator of the earth, and the length of day and night is equal all over the world (regardless of the refraction of the sun light by the atmosphere and the shadow in the morning). In ancient times, there was a saying that "the sun is sacrificed in spring and the moon is sacrificed in autumn", and the autumnal equinox was once a traditional "moon festival". 20 19 Mid-Autumn Festival is a traditional "Moon Festival".

6. Cold dew is the seventeenth solar term among the twenty-four solar terms and belongs to the fifth solar term in autumn. Finger e; Longitude of solar arrival195; Gregorian calendar1October 7 -9 10 every year. Cold dew is a solar term reflecting the characteristics of climate change. After the cold dew solar terms, the days become shorter, the nights become longer, the sunshine decreases, the hot air slowly recedes, the cold gradually increases, the temperature difference between day and night is larger, and it feels a little chilly in the morning and evening. From the climate characteristics, in the cold dew season, the autumn in the south is getting stronger, cool and cool, with little rain and dryness; The vast areas in the north have entered or will enter winter from late autumn.

7. The first frost is the eighteenth of the twenty-four solar terms. Fight with your fingers; The solar calendar is 210; Salary will be paid every year on the Gregorian calendar 10,123-24 October. The first frost is the last solar term in autumn and the transition from autumn to winter. The first frost solar terms are characterized by cold weather in the morning and evening, hot weather at noon, large temperature difference between day and night, and obvious autumn dryness. Because "frost" is a manifestation of cold weather and large temperature difference between day and night, it is named "first frost" to indicate that "the temperature drops suddenly and the temperature difference between day and night is large". In the first frost season, everything is finished, everything goes to heaven, the sun goes to the ground, and the yin begins to condense.