Earth Rotation and Solar Term Changes of Floor Tiles

(1) When the sun shines directly on the equator, it is the vernal equinox (about March 2 1) or the autumn equinox (about September 23) in the northern hemisphere. From the schematic diagram of the earth's revolution, when the earth is in position A, the sun shines directly on the Tropic of Cancer, and the date is around June 22nd. It can be seen from the schematic diagram of the earth's revolution that when the earth is in position A, it is the summer solstice in the northern hemisphere. ?

(2) The revolution direction of the earth is from west to east.

So the answer is: (1) around March 2 1; Summer solstice; June 22; September 23; Solstice of winter; 65438+February 22nd; (2).