Dahan (大寒) is one of 24 traditional Chinese solar terms, reflecting the changing of four seasons. It falls on Jan. 20 this year and most parts of China have entered the depth of winter. (More) Dahan (大寒) is one of 24 traditional Chinese solar terms, reflecting the changing of four seasons. It falls on Jan. 20 this year and most parts of China have entered the depth of winter. (More)