Rosh Hashana Calculations

[Karol PENSON]

I agree with Henry Gould's opinion.
                   Karol A. Penson





wrote:

> Putting religious numbers sequences into OEIS troubles me. For a 
> beginning example, the precise day that Ramadan beings in subject to 
> widely different interpretations. One authoritative source believes it 
> is one day and others thins it is another day. Some people are very 
> strict and say it begins when the leader actually SEES the new moon.
>
> In short I believe these kinds of numbers are too variable to deserve 
> any mention in OEIS.
>
> Does anyone else agree?
>
> These matters like some other recreational sequences are just too 
> vague for my taste. Likewise the planet numbers, atomic weights, 
> binding energies, etc. and most physical constants. They just do not 
> belong in OEIS, which ought to be concerned with validly defined 
> MATHEMATICAL sequences, not artificially contrived and religious 
> numbers. I do not even believe the ushango numbers from the African 
> bone constitute a validly defined sequence so I think OEIS is getting 
> toltally wild and unpleasing if you let these thing in. They belong in 
> an amusement category on another website.
>
> Henry Gould
>
> Hans Havermann wrote:
>
>> Brendan McKay:
>>
>>> A Jewish calendar on the web that has been thoroughly tested is here:
>>>
>>>    http://www.jewishgen.org/jos/
>>>
>>
>> That's great. Thank you so much. I was able to tabulate the data 
>> available there and confirm that my formula agrees with it for the 
>> years 1753-2238. And using those dates, I can now revisit the 
>> original "Years when Ramadan and Rosh Hashana coincide" table:
>>
>> Year   Ramadan   Rosh Hashana
>>
>> 1777      10/3      10/2
>> 1778      9/23      9/22
>> 1779      9/12      9/11
>>
>> 1810      9/30      9/29
>> 1811 =    9/19      9/19
>> 1812       9/8       9/7
>>
>> 1843 =    9/25      9/25
>> 1844 =    9/14      9/14
>>
>> 1875      10/1      9/30
>> 1876      9/20      9/19
>> 1877       9/9       9/8
>>
>> 1908      9/27      9/26
>> 1909 =    9/16      9/16
>>
>> 1940 =    10/3      10/3*
>> 1941 =    9/22      9/22*
>> 1942 =    9/12      9/12
>>
>> 1973      9/28      9/27
>> 1974      9/18      9/17*
>> 1975       9/7       9/6
>>
>> 2005 =    10/4      10/4
>> 2006      9/24      9/23
>> 2007 =    9/13      9/13
>>
>> 2038 =    9/30      9/30*
>> 2039 =    9/19      9/19*
>> 2040 =     9/8       9/8
>>
>> 2071      9/25      9/24
>> 2072      9/14      9/13*
>>
>> 2103      10/3      10/2
>> 2104      9/21      9/20
>> 2105 =    9/10      9/10
>>
>> 2136 =    9/27      9/27
>> 2137 =    9/16      9/16
>>
>> 2168 =    10/3      10/3
>> 2169      9/22      9/21
>> 2170      9/12      9/11
>>
>> 2201      9/30      9/29
>> 2202      9/19      9/18
>> 2203 =     9/8       9/8
>>
>> 2233      10/6      10/5
>> 2234 =    9/25      9/25
>> 2235 =    9/14      9/14
>>
>> *'s are corrected Rosh Hashana dates. Three consecutive coincidental 
>> years are rather special, appearing only twice: 1940-1942 and 2038-2040.
>>
>>
>


-- 
_________________________________________________________________________

Karol A. PENSON

Universite Paris 6                   |  Email : penson at lptl.jussieu.fr.
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