When did the extreme day phenomenon in the Antarctic circle begin?

Therefore, after the vernal equinox, there will be extreme days near the North Pole, and then the range of extreme days will become larger and larger; It reaches its maximum on the solstice in summer, and the boundary reaches the Arctic Circle. From summer to the future, the extreme daily range near the North Pole is gradually reduced, and it is reduced to zero by the autumn equinox. After the autumnal equinox, extreme days appeared near the South Pole, and then the range of extreme days near the South Pole became larger and larger. It reaches its maximum in the winter solstice, and the boundary reaches the Antarctic circle; After the winter solstice, the range of extreme days near the South Pole gradually narrowed to zero until the vernal equinox. This cycle is a tropical year. As we all know, extreme days and nights appear alternately in the North and South poles every year. In a year, six consecutive months are daytime (called extreme daytime) and six months are dark (called extreme night). As clear as day. When the "polar night" comes, the sun will never rise from the horizon and the stars will always twinkle in the dark sky. Extreme day will only appear in the Antarctic and Arctic circles, extreme night will appear in the Antarctic, and extreme night will appear in the Arctic, and vice versa. Because the earth rotates obliquely, in summer and winter, when the earth rotates, the North Pole always faces the sun, no matter how the earth rotates. The opposite is true. The Antarctic circle and the Arctic circle are opposite, so there will be extreme days in the Arctic, and there will be extreme days in the Antarctic, and vice versa. Extreme day and night only occur in summer and winter.

The polar day in the Arctic and the polar night in the Antarctic appear in summer.

Arctic polar night and Antarctic polar day appear in winter.