Reform of the Julian Calendar as Envisioned by Isaac Newton
Reform of the Julian Calendar as Envisioned by Isaac Newton
Reform of the Julian Calendar as Envisioned by Isaac Newton
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1<br />
This is related to Maimonides’ lunar visibility <strong>the</strong>ory, see [4].<br />
2<br />
Inserted instead <strong>of</strong> <strong>the</strong> crossed out ‘12’ before ‘seconds.’<br />
3<br />
The so-called Metonic cycle, <strong>as</strong>cribed to Meton in 431 BC.<br />
4<br />
In 46 BC.<br />
5<br />
In 8 BC.<br />
6<br />
11m 4.6s. Crossed out: ‘129’ days.<br />
7<br />
In October 1582.<br />
8<br />
In 325 AD.<br />
9<br />
3 * 365.25 d/ 100 = 10. 95 ˜ 11d.<br />
10<br />
The first difference between <strong>the</strong> <strong>Newton</strong>ian and Gregorian calendars h<strong>as</strong> to appear in <strong>the</strong> year 2400.<br />
11<br />
Or 1 day in 312 years, or 22.39s in a month, which is <strong>the</strong> difference between <strong>the</strong> <strong>Julian</strong> 29d 12h 44m 25.53s<br />
and adopted <strong>by</strong> <strong>Newton</strong> Horroxian 29d 12h 44m 3.16s months. It seems that <strong>Newton</strong> did not check <strong>the</strong> final<br />
value <strong>of</strong> <strong>the</strong> lunar Gregorian month, which, after elaborate system <strong>of</strong> epacts, is, according to H. Lichtenberg [3],<br />
only 0.5s less than <strong>the</strong> modern mean month.<br />
12<br />
About 1.7s in a month.
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