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.
In the Northern Hemisphere the date of the 2017 Summer Solstice is 21 June at 04:24 UTC. In the Southern Hemisphere the date of the 2017 Summer Solstice is 21 December at 16:28 UTC.tâs at this time that the Sun takes the longest amount of time to cross the sky, giving us the longest day of the year. In the Northern Hemisphere the date of the 2015 Summer Solstice is 21 June at 16:38 UTC.