The Julian Calender. It was so called from Caius Julius Caesar, who conceived and put it into practice.
The name of Caesar's calendar was the Julian calendar. It was replaced in 1582 by the Gregorian calendar, which we used today.
Julian
The Olmec
Until 4pm
The Julian calendar.
The Mayan calendar was indeed very accurate, as it was based on advanced astronomical observations. It included multiple interlocking calendars that tracked different cycles of time. The precision of the Mayan calendar system surpassed that of many other civilizations during that period.
The Julian calendar is 13 days behind the Gregorian calendar from March 1900 until March 2100.
advent calendar
The modern Japanese calendar is the same as the US and Europe, with the New Year beginning on 1 January. Until 1873, they used the same lunar calendar as the Chinese do.
The months of January and February were added to the then 10-month roman calendar around 713 BC by teh semi-mythical King Numa Pompilius. however, the Month fo March remained the first month of the Roamn year until around 450 BC.After the fall of the Western Roman Empire and the rise of states in western Europe, March again came to be the first moth of teh calendar year until the Gregorian from of the calendar was accepted on a country-by-country basis.
We changed from the Julian calendar to the Gregorian calendar because it was out of synch with the solar calendar. The Pope consulted an astronomer and it was decided to add leap years to correct the problems. Catholic countries changed in 1582. However Germany did not until 1700 and Great Britain waited until 1752. Russia did not change until 1918.
There was once an ancient civilization called the Mayan civilization unlike our own. Their calendar went on for years and years, until the day the calendar ended. On December 21st, 2012, the world is supposedly going to end because the Mayan calendar ends on that day.