Happy Winter Solstice! Teachers, don't forget to enjoy dumplings and tangyuan~ Today is actually a Four Happiness Day, worth celebrating～

On December 21, 2025, the Winter Solstice coincides with Tianshe Day, forming the Heaven and Earth Harmony and Virtue Four Happiness Day. This combination of the Heavenly Stems and Earthly Branches occurs approximately once every 80 years, symbolizing the harmony of yin and yang and the starting point of the seasonal cycle. In the Northern Hemisphere, it is the shortest day of daylight, and its folk significance is comparable to the New Year, with notable differences in customs between the North and South.