Today is Winter Solstice, also called Dongzhi Festival 冬至, It is one of the 24 solar terms and is one of the most important Chinese and East Asian festivals.
The origins of this festival can be traced back to the Yin and Yang philosophy of balance and harmony in the cosmos. Yin represents darkness and cold and stillness, thus the longest day of winter, Yin is at its most, Dongzhi marks the return Yang with longer daylight, and the slow ascendance of light and warmth, this also symbolizes the opportunity for renewal, a shedding of bad habits and negative feelings, and an embracing of hope amid darkness as the days once again begin to grow longer.
Traditionally, the Dongzhi Festival is also a time for the family to get together. In many areas, it is also the best time of the year to take tonic foods. Dumplings are usually eaten to celebrate in some East Asian cultures.
In southern regions of China, one activity that occurs during these get-togethers is the making and eating of tangyuan (湯圓) or balls of glutinous rice, which symbolize reunion.
It is also a great time to nourish the body with warm soups, protect yourself from coldness, get plenty of restful sleep to restore the Yang in your body.