When is the first frost of the lunar calendar?

1, the descending time is 65438+23 on Gregorian calendar1October 23 -24, and 24 solar terms are determined according to the position of the sun on the ecliptic. When the longitude of the sun is 2 10, it is the first frost. The first frost does not mean "frost", but "frost" is a manifestation of cold weather and large temperature difference between day and night. Therefore, it can be said that the name of the first frost is only a metaphor, which is used to express that this season of "sudden drop in temperature and great temperature difference between day and night" is accompanied by frost.

2. The first solar term in first frost, one of the 24 solar terms in the lunar calendar, is around 65438+1October 23rd every year. The first frost solar term means that the weather is getting colder and the first frost appears. It is the last solar term in autumn and also means the beginning of winter. Health care is particularly important in the first frost season. There is a folk saying that it is better to make up the first frost in one year, which shows the influence of this solar term on us. The first frost is the last solar term in autumn, which is the transition from autumn to winter. There is a lot of heat dissipation on the ground in autumn, and the temperature suddenly drops below 0 degrees. Water vapor in the air directly condenses on the ground or plants to form fine ice needles, and some become hexagonal frost flowers, which are white and loose in structure. Frost can only form on sunny days, which is what people mean when they say that the sun is fierce and frosty.