What months are the four quarters?

1, February and March are the first quarter, April, May and June are the second quarter, July, August and September are the third quarter, and 10,1and 12 are the fourth quarter.

"Twenty-four solar terms" is the product of ancient farming civilization, and farming production is closely related to the rhythm of nature. It is a knowledge system formed by ancient ancestors who followed the farming season and realized the changing laws of time, climate and phenology in a year by observing the movement of celestial bodies. In ancient times, solar terms were established on the basis of "variable stars" (referred to by bucket handle), but now, solar terms are established on the basis of "the annual apparent movement of the sun" (the degree of the yellow meridian); Although the two methods are different, the cause of the struggle is that the earth revolves around the sun, so the intersection time of the two methods is basically the same.

Extended data:

Other highlights of this quarter:

Other highlights of this quarter:

1, solar terms method. Astronomically speaking, the spring equinox, summer solstice, autumn equinox and winter solstice are the beginning of the four seasons. Beginning of spring, Changchun, beginning of autumn and beginning of winter were the four seasons in ancient China. This is based on the position of the earth in orbit. ?

2. the law of the moon. Lunar calendar 65438+ October to March is spring, April to June is summer, July to September is autumn, and 65438+ October to 65438+ February is winter. ?

3. solar calendar method. Meteorology usually takes March-May as spring, June-August as summer, September-165438+10 as autumn, and June-February as winter. ?