june 21

During the Earth's trip around the Sun, solstices come around twice a year, at the points in Earth's orbit where this tilt is most pronounced. The summer solstice begins around June 21 whereas the December solstice arrives on December 21. Solstices also mark the change of seasons throughout the year. The first day of the Summer Solstice marks the day when the Sun is directly over the Tropic of Cancer which is located at 23.5° latitude North. June 21 is also the longest day of the year, but why is it so? The science…