Lunar Calendar The Calculation of Lunar Calendar is based upon the motion of moon in its orbit around the sun. In one Gregorian Calendar the moon completes 12.37 cycles. There are 354 days, 8 hours, 48 minutes and 34 seconds in a Lunar Calendar and each month has approximately 29 days, 12 hours, 44 minutes and 3 seconds. The Lunar Calendar has 12 months and it is about 11 days shorter than Gregorian Calendar. It is being followed in many countries of the world including China, Japan, Korea, Vietnam and Mongolia. In many Muslim countries the Islamic festivals and important religious events such as Ramadan, Hajj, and Eid are celebrated according to the movement of moon. History Of Lunar Calendar The most ancient Egyptian calendar was based on Lunar calendar system. This Lunar calendar was not considered accurate as the Egyptians we unable to predict the exact annual flooding of the Nile River, so they adopted the solar calendar and thus they became the first nation to follow the solar calendar. The ancient Lunar calendar was found in Scotland (Warren Field), this calendar is dated to approximately 8,000 BC (in middle stone age) but according to some scholars the history of Lunar Calendar still furthers back.Difference Between Gregorian And Lunar Calendar Gregorian Calendar is based upon the time period of earth’s movement around the sun in its orbit, it is also known as Solar year. There are 365 (in a common year) and 366 days (in a leap year) in each Gregorian Calendar, and it is 11 days longer than the Lunar Calendar.The Gregorian Calendar has been divided into 12 months, the length of 11 months out of 12 is either 30 or 31 days, but the month of February (2nd month of the Gregorian calendar) has 28 days during a common year and 29 days during a leap year. A leap year comes after every 4 year and the length of this year is 366 days. Gregorian Calender is being followed in many regions of the world for communication, business and other international affairs.According to international standard the week starts with Monday but in some few countries including Canada and United States Sunday is considered the first days of the week. Each week has 7 days and there are about 52/53 weeks in a Gregorian Calendar, a year in this calendar has four weather or seasons recognized as spring, summer, autumn and winter. The temperature and weather conditions of these seasons are different from each other which makes them suitable for the growth of variety of fruits and vegetables.