Customs of first frost solar terms
The first frost is the eighteenth of the twenty-four solar terms and the last solar term in autumn. 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.
"In the first frost, only this grass flourishes", so chrysanthemum was regarded as "grass in season" by the ancients and became a symbol of vitality. The first frost season is when autumn chrysanthemums are in full bloom. Many places in China will hold chrysanthemum parties at this time to enjoy chrysanthemums and drink alcohol to show their respect and love for chrysanthemums.
Agricultural activities:
After the first frost solar terms, cold air activities become more frequent, and the temperature difference between day and night becomes larger. The "first frost" solar term has nothing to do with "first frost", which does not mean that entering the first frost solar term will lead to "first frost". In fact, "frost" does not fall from the sky, but the water vapor on the ground condenses when it meets cold air due to temperature difference changes.
There is no concept of "first frost" in meteorology. Generally speaking, the first frost in autumn is 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. In the first frost season, most parts of the north have been harvested in autumn.