The first frost is celebrated on Gregorian calendar 10 every year123-24 October. After entering the first solar term in first frost, the scene of late autumn is obvious, and cold air moves southward more and more frequently. The first frost does not mean "frost", but refers to the sudden drop in temperature and the large temperature difference between day and night. The first frost is the season with the largest temperature difference between day and night in a year.
In the first frost season, it's all over. From the morning, the sun went down to the ground, Yin Qi began to condense, and the first frost weather became colder and colder. Because "frost" is a manifestation of cold weather and large temperature difference between day and night, it is named "first frost", which means "sudden drop in temperature and large temperature difference between day and night".
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. The solar terms in the first frost mainly include the customs of enjoying chrysanthemums, eating persimmons, climbing high and overlooking, and tonic.
The custom of first frost
1, drink and enjoy chrysanthemums. Meteorology, the first frost in autumn is generally called "first frost" or "chrysanthemum frost", because chrysanthemums are in full bloom at this time, which is a good time to enjoy chrysanthemums. In ancient times, there was a saying that "frost blooms chrysanthemums", so climbing mountains and enjoying chrysanthemums in the first frost became an elegant activity. It is recorded in "Continued Harmony" by Wu Jun of Nanliang.
2. Eat beef. Residents in Yulin, Guangxi are used to eating fried noodles with beef river for breakfast, fried radish with beef for lunch or dinner, or beef brisket pot to replenish energy and pray for warmth and strength in winter. Besides beef, mutton and rabbit meat, it is also suitable for the first frost.
3. climb high and look far. In autumn, the air in mountains and rivers is fresh, and there are less floating dust and pollutants in the atmosphere. Looking at the top in the first frost season can not only make the function of the lungs comfortable, but also make people feel relaxed and relaxed.
Phenological phenomenon
Wu Cheng, a scholar in the Yuan Dynasty, compiled Twenty-four Solar Terms, which divided the first frost into three stages: one was the sacrifice of the jackal; Second, the vegetation is yellow; Three stings are salty. At this time, jackals and other animals began to catch prey for the winter; The leaves are all yellow and falling; Hibernating animals also hide in caves and go into hibernation without food.