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I saw on a calendar that each year has a siman, for example 5772 has the siman 517.

Here are the simanim for the next few years:

  • 5773: 203
  • 5774: 1523
  • 5775: 517
  • 5776: 1217

Does anyone know the meaning of the siman? I was thinking about a description of the year but I can't find relevant things.

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Why "Some years"? –  Double AA Apr 30 '12 at 18:25
    
can you tell us the name of the calendar? –  Menachem Apr 30 '12 at 18:25
    
@Menachem it's a calendar edited by a shul in Paris –  allced Jun 12 '12 at 8:44
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1 Answer

up vote 2 down vote accepted

My guess would be that it means as follows:

First Day of Rosh Hashanah = Thursday = 5

One Adar (i.e., non-leap-year) = 1

First Day of Pesach = Shabbos = 7

From this information you could extrapolate everything else in the year.

I've never seen this particular system before, but it makes sense.

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this my first idea but I see this siman on an other year for which the first day of Rosh Hashanah is a Monday :( –  allced Apr 30 '12 at 13:27
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The "1" in the second place actually means that it's a "kesidran" year, where the months are sequentially 30 and 29 days; thus, Cheshvan had 29 and Kislev 30. ("0" would mean a "chaseirah" year, where both of them are 29 days; "2" is a "malei" year, where both have 30. That's the system used in the tables in Leo Levi's Jewish Chrononomy.) –  Alex Apr 30 '12 at 13:48
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Interesting, @Alex! That's not a very intuitive system, if you ask me. –  Dave Apr 30 '12 at 13:56
    
@allced - what was the other year that had this siman? –  Dave Apr 30 '12 at 13:57
    
@Dave: here the simanim for the next years: 5772: 517 5773: 203 5774: 1523 5775: 517 5776: 1217 –  allced Apr 30 '12 at 14:21
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