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.
It is also the moment that the object will be at its highest altitude (which, I think, is what you are asking). So, for a given day, the Moon is at its highest point in the sky at the moment of its meridian passage. The Sun is at its highest point at the moment of the Sun's meridian passage. Sirius is at its highest point (for a given night), at the moment of Sirius's meridian passage... and so on. Over a period of time (day after day, month after month), the altitude of the Moon at its highest daily point will be different.