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.
By the way, a similar situation occurs at the summer solstice, for the same basic reason, though the effect is not as extreme. Solstice occurs around June 21, but at latitude 40Â° north the earliest sunrise occurs around June 14 and the latest sunset occurs around June 28.