How to judge solar terms

(1) When the earth revolves to point A, it is a winter solstice solar term, and the date is around 65438+February 22nd. The sun shines directly on the Tropic of Capricorn (or 23.5 S) (latitude), and the arctic circle appears extreme night phenomenon. On this day, Zhucheng has the shortest day and the longest night.

(2) When the earth revolves to B, the sun shines directly at the equator 0 (latitude), and the length of day and night in Zhucheng is equally divided.

(3) Around New Year's Day, the earth turns around AB, and the days and nights of Zhucheng are long.