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from Callippic cycle to year (Julian) conversion
|[a, y, or yr]|
Result in Callippic cycle?
|Start value:||[year (Julian)]|
|Step size||[year (Julian)]|
|How many lines?||(max 100)|
|year (Julian)||Callippic cycle|
Definition of year (Julian) unit: = 365.25 d average. The basic calendar year has 365 days, but in fact the Earth needs a little more time around the sun. The Julian calendar compensated this with leap year (every fourth year had 366 days). According to the formula, a Julian year has 365 + 1/4 = 365.25 days. But even with this compensation, the astronomical year slip 0.78 days every 100 years into real seasons. Therefore, most countries have moved to the Gregorian calendar introduced in 1582.
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