The solar term date is in the northern hemisphere.

According to the rotation direction of the earth, it can be determined that this picture is the top view of the North Celestial Pole. First of all? According to "left leaning left winter, right leaning right winter", the position of winter solstice is determined, which is C, 65438+February 22nd, and then it is determined in turn according to the revolution direction of the earth (rotation and revolution direction are the same): D, vernal equinox, March 2 1 day, and the sun is facing the equator; First, the summer solstice, June 22, the sun directly to the Tropic of Cancer; B, the autumnal equinox, on September 23rd, the sun shines directly on the equator. So the answer is:

Point a: summer solstice; June 22 (around); 23° 26' N(23° 26' N or Tropic of Cancer) Point B: the autumnal equinox; September 23 (around); 0 Latitude (Equator)

Point C: winter solstice: 65438+February 22nd (around); 23 26 degrees (23 26 degrees or Capricorn)

Point d: vernal equinox; March 2 1 (before and after); 0 Latitude (Equator)