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The whole lives of the societies which have actually invented these calendars were built around the vegetation cycle, which ruled pastures, fields, and orchards. So the yearly cycles of food availability, work, seasonal migrations, and the correlated weather pattern changes were all reasonably aligned with the start / end of the year.

Peoples as diverse as Celts, Romans, Slavs, Babylonians, Hindus, and various peoples in China all used a variety of a calendar where the yearly changes were aligned around modern October-November and modern March-April.

A calendar with the year starting in January and with astronomically (more) precise years was promulgated by Julius Caesar in -46. (I suspect the introduction of the concepts of Babylonian astrology to Rome a century before may have played a role in the desire to align the calendar to stars and not to earthly affairs.)



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