The exact dates of summer solstice, autumnal equinox, winter solstice and vernal equinox in the Year of the Tiger in 2022.

The exact dates of summer solstice, autumnal equinox, winter solstice and vernal equinox in the Year of the Tiger in 2022.

Summer solstice: June 2, 20221day 17: 13:40.

Autumnal Equinox: 22: 59 on September 23rd, 2022.

Winter solstice: 65438+February 22, 2022 05:48:0 1

Vernal equinox: March 20th, 2022, 17:37: 19.

The origin of summer solstice

On the solstice of summer, the sun shines directly on the Tropic of Cancer, which is the longest day of the year in the northern hemisphere. It takes about fourteen hours from sunrise to sunset in all parts of Sichuan. Although the summer solstice has the longest day and the highest sun height, it is not the hottest time of the year. Because the heat in the near-surface layer is still accumulating at this time, and it has not reached its maximum. After the summer solstice, due to the vigorous growth of crops, the rapid growth and spread of weeds, pests and diseases, and the golden season of grass, fertilizer and livestock flourishing in plateau pastoral areas, agricultural production in our province has entered the field management period. At this time, the rainfall in the western part of the basin increased obviously, which gradually changed the distribution trend of rainfall in the basin from the east to the east since the spring. If there is a summer drought, it is generally expected to be lifted at this time. In recent 30 years, the number of large-scale floods in the western part of the basin in late June is small, but the degree is serious. Therefore, special attention should be paid to preparing for flood control. The summer solstice solar term is the solar term with the largest annual rainfall in the eastern part of the basin, which is often controlled by subtropical high in the future, leading to drought.