Winter solstice is related to Dongzhi Festival . Because of Marks the winter solstice the festival Dongzhi Festival is observed . The festival is observed by Chinese,Japanese,Koreans . Dongzhi Festival is of Cultural type . The common name of the festival Dongzhi (冬至) is Dongzhi Festival . Tang-cheh (冬節),Tōji (冬至),Dongji (동지) is also called Dongzhi Festival . The frequency of this festival is annual . Winter solstice (between December 21 and December 23) is when Dongzhi Festival is celebrated . making and eating of tangyuan,ancestor worship are the observances in Dongzhi Festival
The festival Dongzhi Festival is celebrated due to 2 reasons