The solar terms, based on the sun’s position in the zodiac. It was created by farmers in ancient China to guide agricultural affairs and farming activities. Winter Solstice, one of the 24 solar terms, is an astronomical phenomenon. The daytime is the shortest and the nighttime is the longest of the year.
24 solar terms／ 24節氣
例句：Farmers were the ones who created 24 solar terms.
例句：People eat tangyuan at Winter Solstice.
例句：What is your Zodiac sign?
冬至的活動（Activities of Winter Solstice）
The date is observed with a family reunion over the long night, and people would eat tangyuan on that day.