Earth celebrates several new years— according to the communities and cultures. Chinese have their own new year, westerns have their own, and so have the south asian like Nepal. I’m from Nepal, and there January 1 is not the equivalent date when we celebrate our New Year. And, that might be the case for other places too(Not sure about that tho).
So, which new year is the exact day when the Earth completed one revolution around the Sun?
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>So, which new year is the exact day when the Earth completed one revolution around the Sun?
There is no such objective date, because there’s no objective start or end point for what constitutes one revolution around the Sun.
*Technically* speaking, though; lunar calendars are not accurate with respect to timing the passage of a single year, entirely because they’re based on the phases of the moon. Granted, the moon actually does (by coincidence) line up relatively closely with the time it takes for the Earth to make a revolution around the Sun, but it’s going to be off, and the error builds up over time.
The Western Gregorian calendar also isn’t exact (as it tries to align travel time around the Sun to a specific number of days), but it’s much closer, and it already has a system in place called Leap Years to account for the errors.
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