Why Use Moon Calendar? Since the beginning of civilization, humans have felt the need for time-sharing systems into units of the period of "month" and "year", commonly called Calendar. Human need that calendar system related with the interests of their everyday life, and their religious life or interests.
References used to compile the calendar is cyclical movement of the two celestial bodies are very large influence on the human life on Earth, the Moon and the Sun. Calendar which is based on a moon sinodic cycle called the Moon Calendar. Calendar which is based on the cycle of the tropical sun is called Solar Calendar. While the calendar is drawn up with reference to the so-called second-Sun Moon Calendar (Luni-Solar).
About four thousand years BC, the Arabs have made the Sun Calendar. At that time the solar calendar year consists of 365 days with details of 360 days divided into 12 months of age, respectively 30 days, and 5 days for the annual feast of the Arab nation. Later the solar calendar used also by Roman society. The Arabs themselves and then switch on the Moon Calendar is also used by the ancient Egyptians and Babylonians. Moon-Sun calendar used by the people of China and India.
Why Use Moon Calendar?The fall of the choice of the formal system as a moon calendar seems not merely because he happened to be down for the first time to the user community's calendar, but the system was compared with the moon calendar is a solar calendar more in line with the life of the world community who require ease.
In the lunar calendar, moon age can be known easily through simple observation of the moon. This is related to the movement of the Moon cycle that makes the Moon is present in humans on Earth observation in the position and shape of the ever-changing appearance every day significantly. Change is a position shift to the East as far as the average of 13° each day, equivalent to 26 times the center line of the dial, and at the same time result in a change that shifts shape appearance.
Things like that do not happen on the Sun which comes with a relatively similar appearance every day. Despite the fact it also shifts the position of the Sun, which is to the North or to the South, but the shift that occurred was not conspicuous due per day on average of only 0° 15 '24.54 ", or just a half times the center line of the dial. Therefore the sun calendar is not as in a moon calendar, in the moon calendar in which the age of the sun could not be easily known through simple observation of the sun.