How to judge the latitude of the direct point of the sun

On March 2 1 day (vernal equinox), the direct point of the sun is at the equator (0 degrees), on June 22 (summer solstice), at the tropic of cancer (23 degrees 26 minutes north latitude), on September 23 (autumn equinox), and on February 22 (winter solstice), at the equator (0 degrees). If the revolution speed of the earth is regarded as uniform (actually slightly different), it moves about 15.7 minutes every day (estimated), and the latitude of the direct sun point on other days can be estimated by referring to the position and moving speed of the bisector to the sun.