How to correctly divide the four seasons?

There are four seasons in a year, namely spring, summer, autumn and winter. 65438+1October 20 is the vernal equinox, which means entering spring. June 2 1 day is the summer solstice, that is, entering summer. September 23 is the autumnal equinox, that is, entering autumn. 65438+February 2 1 is the winter solstice, which means entering winter.

According to the date of AD.

Spring:

February 3-5 solar terms [beginning of spring (solar terms), longitude 3 15 degrees];

February 18-20 [Rain (neutral gas), longitude 330 degrees];

March 5-7, 10 bytes [fright (solar terms), 345 degrees of longitude];

March 20-22, solar term [vernal equinox (neutral qi), longitude 0 degrees];

April 4-6, solar terms [Tomb-Sweeping Day (solar terms), longitude 15 degrees];

April 19-2 1 [Grain Rain (Zhongqi), longitude 30 degrees];

Summer:

May 5-7, solar term [long summer (solar term), longitude 45 degrees];

On May 20-22, the solar term [Xiaoman (middle gas), 60 degrees of the yellow meridian];

June 5-7, solar terms [awn species (solar terms), longitude 75 degrees];

June 2 1-22 [Summer solstice (Zhongqi), longitude 90 degrees];

July 6-8, solar terms [light summer (solar terms), longitude 105 degrees];

July 22-24, solar term [summer heat (Zhongqi), longitude 120 degrees];

Autumn:

August 7-9, solar terms [beginning of autumn (solar terms), longitude 135 degrees];

August 22-24, solar term [summer heat (neutral), longitude 150 degrees];

September 7-9 [Millennium (solar term), longitude 165 degrees];

September 22-24 [autumnal equinox (neutral), longitude 180 degrees];

65438+1October 8-9 [cold dew (solar terms), longitude 195 degrees];

65438+1October 23 -24 [first frost (neutral), longitude 210];

Winter:

165438+1October 7-8 [beginning of winter (solar terms), longitude 225 degrees];

165438+1October 22-23 [light snow (neutral), longitude 240 degrees];

65438+February 6-8, solar terms [heavy snow (solar terms), longitude 255 degrees];

65438+February 2 1-23 node [winter solstice (neutral), longitude 270 degrees];

65438+1October 5-7 [slight cold (solar terms), longitude 285 degrees];

65438+1October 20th -2 1 intersection [Great Cold (Zhongqi), longitude 300 degrees].