Since the early days when the Babylonians. Formulated using a calendar based on the moon is in the count at the end of 12 months is considered the first year, and to achieve a balance between the calendar year with the seasonal year. We've added a month for 1 month to 13 months in every four years later, the Egyptians, Greek and Semitic c. Have adopted the practice of the Babylonians adapted. Until the reign of King Julius Caesar introduced the idea of an Egyptian astronomer named a new Beziers. To provide a year has 365 days, every 4 years for 29 days is called a leap day of February and on 21 March, it was during the day and night are equal. Worldwide, it is time to call it a day as a 12-hour, daytime, evening, equality of March 2125 on Equinox in March to be held on March 11 instead of March 21. So Pope Gregory. 13 is adjusted Instead of October 5 was changed to October 15, the new calendar, called the Gregorian calendar Arion adopted January 1 as the beginning of the year onwards.
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