Traditional Culture Encyclopedia - The 24 Solar Terms - How to judge solar terms by polar circle

How to judge solar terms by polar circle

Summer solstice? (2) Extreme sunlight

This topic examines the comprehensive analysis of the terminator line diagram. (1) shows that the termination line is tangent to the polar circle, and there is an extreme day in the Arctic circle and an extreme night in the Antarctic circle, so it is judged as the summer solstice; (2) The Arctic Circle is always in the daytime hemisphere, that is, extreme sunlight appears.