Extreme solar terms

1, at apohelion (early July); 2. Summer solstice; 3. Solstice in winter; 4. Farewell. The earth's revolution around the sun can be divided into apohelion (early July) and perihelion (1early October, 65438), while the Arctic Circle and its northern region have extreme days (June 22nd) from summer solstice in the northern hemisphere and extreme nights (65438+February 22nd) from winter solstice.