Frostfall is the eighteenth of the twenty-four solar terms, the last of the fall season. In the Gregorian calendar on October 23rd to 24th each year to cross the festival. After entering the frost, the late fall scenery is obvious, cold air south more and more frequent. Frost does not mean "frost", but rather a sudden drop in temperature, the temperature difference between day and night is large, the national average, "frost" is the largest temperature difference between day and night of the year.

The frosty season is characterized by chrysanthemums, persimmons, and other customs, such as climbing up to the top of the mountain and enjoying the view from afar.