Dahan, or Major Cold, is the final solar term among the 24 solar terms. It occurs when the sun reaches 300° longitude, typically between January 20 and 21 each year. Once Dahan passes, the cycle of the four seasons begins anew. As Dahan approaches the Spring Festival, it is filled with a joyful and festive atmosphere, as people become busy with cleaning, preparing New Year dishes, and getting ready for the celebrations.

Meteorological conditions 

During Dahan, cold waves frequently sweep southward, marking the coldest period of the year in most parts of China. The weather is characterized by strong winds, low temperatures, and persistent snow cover, creating a scene of icy landscapes and freezing conditions.

Customs 

According to legend, the Kitchen God, sent by the Jade Emperor of Heaven to oversee people's behavior, returns to heaven at the end of the year to report on the morality of households, which helps determine rewards and punishments. During Dahan, families offer candies, clean water, beans, and fodder at the Kitchen God's altar. They also melt Guandong sugar and apply it to the Kitchen God's mouth to prevent him from speaking ill of them.

As Dahan arrives, people begin the preparations for the upcoming Spring Festival, including cleaning, renewing decorations, curing meats, and preparing various offerings for rituals, as this is the most important festival for Chinese people.

Health tips 

In the cold winter months, many people indulge in rich foods, which can harm the spleen and stomach. Therefore, it's important to take care of digestive health during this time. Regular meal times should be maintained, and one should avoid overeating. It's advisable to limit consumption of cold and raw foods, favoring easily digestible options while ensuring warmth for the abdomen.