Text 4423, 89 rader
Skriven 2009-04-11 10:27:06 av God Dan (1:138/666.0)
     Kommentar till en text av Bob Ackley
Ärende: Passover
================
-> On 23 Mar 09  00:35:12, Bob Ackley got back to God Dan 
-> Re: The lost book of Abraham

 GD> The RCC says they are against astrology and such, but how do they
 GD> figure out what day easter falls on each year?  I wonder if they
 GD> think they are really fooling anybody these days...  

 BA> or so years ago when I last tested it <g>.  Easter falls on the first
 BA> Sunday after the full moon that follows the spring equinox, if memory
 BA> serves it falls in the period including the last 10 days of March and
 BA> the first 18 days of April - something close to that, anyway. 

The calculation is correct.  I'm not sure of the range.  However, the 
very earliest Easter can fall is March 22.  

the latest?  March 22 + 28 days + 7 days = April 26 

I think I set that up right.  I went for the latest possible spring 
equinox that would fall on a Sunday and be a full moon as well.  



For more fun check out how the date of Passover is calculated!  

http://tinyurl.com/d6wbgo 

Whoops, you don't do I-net.  I'll post it here, but be warned.  The 
paragraph formatting leaves much to be desired.  


=====================

For some Reform Jews,
most Conservative Jews, and Jews living outside Israel, Passover will last for
eight days, concluding either at sunset or at nightfall (depending on the
authoritative rabbinical opinion one follows) on Thursday, April 16th, 2009,
or in the Hebrew calendar, from 15 Nissan 5769 to 22 Nissan 5769.  For Jews
who celebrate Pesach / Passover for 7 days (most Reform Jews, some
Conservative Jews, and Jews living in Israel), Pesach / Passover in 2009 will
commence either just after sunset or just after nightfall on Wednesday, April
8th, 2009, concluding either at sunset or at nightfall on Wednesday, April
15th, 2009, or in the Hebrew calendar, from 15 Nissan 5769 to 21 Nissan 5769.
In fact, in the Hebrew calendar, Passover always begins on the 15th day of the
Hebrew month of Nissan for those who celebrate Passover for 7 days or for 8
days and always ends on the 21st day of Nissan for those who celebrate
Passover for 7 days, and always ends on the 22nd day of Nissan for those who
celebrate Passover for 8 days.  However, in the Gregorian calendar which
comprises the January to December months of the year, Passover begins and ends
on different days each year.  Why?  (I had to ask) Well, I asked, so here
comes the answer: the Hebrew calendar is primarily a lunar calendar, meaning
the months are determined by the new moon that occurs when the first sliver of
the moon appears following the complete darkness of the moon, and the
Gregorian calendar is a solar calendar based upon the Earth's rotation around
the sun.  Since there are 12.4 lunar months in every solar year, this means
that a 12-month lunar calendar will lose about 11 days off the solar calendar
every year.  Since the Passover date is a fixed date in the Hebrew calendar
then this means that the Passover date would occur earlier and earlier in the
Springtime in the solar year until it would occur in the Wintertime, then in
Autumn, then in Summer, and then back to Spring, and so on.  To make up for
this 'drift' in the Passover date through the solar months of the solar year,
an extra month was periodically added to the Hebrew calendar so that the
Passover date would drift back about 11 days each year for about two or three
years, then jump forward by about a month's worth of days (29 or 30 days).  To
help solve this problem, Rabbi Hillel II in 358 or 359 C.E.  used astronomical
and mathematical calculations to align the lunar year with the solar year over
a 19-year cycle.  To achieve this, Hillel II standardized the length of each
of the 12 lunar months, making them either 29 or 30 days so that the length of
the 12 lunar months could be aligned with the length of each of the 12 solar
months.  Additionally, over this 19-year cycle, a second month of "Adar"
called "Adar II" was and is added in the 3rd, 6th, 8th, 11th, 14th, 17th and
19th years of the cycle, meaning in those years the month of Adar is replaced
with the months of Adar I and Adar II.  The leap year for Adar is 30 days and
in non-leap years, Adar has 29 days.  Under Hillel II's lunisolar Hebrew
calendar, the months are determined according to the new moon and the years
are determined according to the sun.  This means that the Passover date will
change only slightly from year to year in the Gregorian or solar calendar,
with the second month of Adar being periodically added to keep the Passover
date in the Springtime.  It is important to keep Passover in the Springtime
because this is when the first Passover occurred and because Passover must be
celebrated in the specific agricultural season of Springtime, which depends on
the solar year and necessitates the Passover date adjustment.

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