Who decided a year should have 12 months? Curious Questions & Answers | Educational Videos by Mocomi

:Who decided a year should have 12 months? People across the world follow the Gregorian calendar. The world converted to the Gregorian calendar in 1752. Otherwise different people around the world followed different calendars. Infact people who do agriculture and farming, still use a combination of solar and lunar calendars. Who came up with the 12 month calendar? The 12 months in the calendar, as we know them today, were first introduced by Julius Caesar, in the year 45 BC, on 1st January. How many months were in the original calendar?