Dongzhi Festival is observed on December 21, 2025. The Dongzhì Festival or Winter Solstice Festival is one of the most important festivals celebrated by the Chinese and other East Asians during the Dongzhi solar term (winter solstice) on or around December 22 when sunshine is weakest and daylight shortest. The origins of this festival can be traced back to the yin and yang philosophy of balance and harmony in the cosmos. After this celebration, there will be days with longer daylight hours and therefore an increase in positive energy flowing in. (With material from: Wikipedia)