The Sumerians are thought to have formed the first human civilization in world history. They lived in southern Mesopotamia, between the Tigris and Euphrates Rivers in the Middle East. Cradle of Civilization. Many historians think that cities and towns were first formed in Sumer around 5000 BC.
At noon, on March 21 and September 23rd are the vernal and autumnal equinoxes. The sun is directly overhead at the equator at these times. On June 22nd is the summer solstice, in the Northern Hemisphere. The sun is at the 23.5 degrees Northern latitude.
Because the summer solstice occurs when the North Pole is tilted most towards the sun, the sun reaches its highest point in the sky on that day, which usually occurs around June 21 each year. From now on, days will only get shorter as we travel toward the winter solstice on Dec. 21.