What was the solar term for walking on the ice in 3949?

Walking on the ice in 3949 was a severe cold solar term. Great cold is the last of the 24 solar terms in the whole year. Every year around 65438+1October 20th in Gregorian calendar, when the sun reaches 300, it is a severe cold. At this time, the cold wave moves southward frequently, which is the coldest period in some parts of China in a year.

Solar terms refer to the twenty-four solar terms, which is a supplementary calendar formulated by China in ancient times to guide farming, and is the crystallization of the long-term experience and wisdom of the working people of the Chinese nation.