What is the subsolar point?
Is the point at which the Sun is directly overhead. Moves westward circling the globe once today and also moves north and south between the tropics during the year. The movement of the subsolar point is called declination.
During the December solstice the subsolar point is on the Tropic of Capricorn and during the June solstice it is on the Tropic of Cancer.
During the March and September equinoxes, the subsolar pointi is on the equator