What does the first frost mean in the twenty-four solar terms? 202 1 when is the first frost date and when is the first frost time?

What does the first frost mean in the twenty-four solar terms? When is the first frost day? When is the first frost? With the arrival of September in the lunar calendar, autumn has quietly come to us. Let's take a look at the topic of Huayi. com！

What does the first frost mean in the twenty-four solar terms?

The frost in the first frost solar term refers to the climate characteristics of obvious flowers on the other side of the weather, large temperature difference between day and night, obvious autumn dryness and gradually cold weather, which does not mean that it will "fall frost" when entering this solar term. In fact, "frost" didn't fall from the sky. The "frost" is the condensation of water vapor on the ground when it meets cold air due to the change of temperature difference. There is no concept of "first frost" in meteorology. Meteorologically, the first frost in autumn is generally called "first frost" or "first frost", and the last frost in spring is called "late frost" or "final frost". The interval from the last frost to the first frost is a frost-free period, and "frost" generally appears in autumn, winter and spring. The solar term "first frost" has nothing to do with "first frost" and is not the same concept. The "frost" of the first frost means that "frost" is a manifestation of cold weather and large temperature difference between day and night. Therefore, it is named "first frost", which means that the temperature drops suddenly and the temperature difference between day and night is large.

When is the first frost day? When is the first frost?

202 1 First frost date: 202 110/October 23rd 12:5 1:00 Lunar 2021September 18th.

The first frost, the eighteenth of the twenty-four solar terms, is the last solar term in autumn, which falls on the Gregorian calendar 10 year1October 23-24. The first frost does not mean "frost", but refers to the sudden drop in temperature and the large temperature difference between day and night. On the national average, "first frost" is the season with the largest temperature difference between day and night in a year.