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Old February 19th 10, 05:17 PM posted to sci.math,sci.physics,sci.astro,sci.lang,alt.usage.english
Yusuf B Gursey
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Posts: 78
Default The perpetual calendar

On Feb 19, 12:10*pm, "Peter T. Daniels" wrote:
On Feb 19, 10:30*am, Yusuf B Gursey wrote:





On Feb 19, 8:24*am, "Peter T. Daniels" wrote:


On Feb 19, 4:34*am, James Hogg wrote:


John Atkinson wrote:
Halmyre wrote:
On 19 Feb, 04:58, "Ray O'Hara" wrote:
"Andrew Usher" wrote in message


...


Owing to the inconveniences which attend the shifting of the
calendar, and attempting in passing to create a more perfect
Church calendar, I say the following: 1. That Christmas day
should be fixed to a Sunday, and this should be the Sunday
between Dec. 21 and 27, and that in all civilised countries the
Monday should be considered a holiday, or the Saturday if not
normally. 2. That similarly Easter day should be fixed to the
Sunday which is 15 weeks following Christmas. 3. That the leap
year rule be changed to have a leap year occur every fourth
save that it be delayed when the leap year would start on a
Thursday, and that this gives 7 leap years in every 29, which
is near enough. 4. That the perpetual calendar can be made, by
considering the first day of the year of weeks to occur on the
Sunday after the Assumption, and if this is the first possible
calendar day, it is called week 1, and otherwise week 2, and
every year runs through week 53. And this calendar ensures that
everything can be fixed to a day of a certain week, in
particular the American Thanksgiving must be made 31 days
before Christmas. 6. This is surely the best possible
arrangement that can be made, without disturbing the cycle of
weeks or that of calendar days inherited from the Romans.
Andrew Usher
The calendar has several sources, not just the Rome and the onewe
habe in fine as it is
I just wish they'd settle on a date for Easter and be done with it.


But, the whole point of Easter is that it has a full moon! *You might
as well scrap the whole thing otherwise. *Or are you suggesting that
we only take holidays at Easter every four years or so, when your
“settled” date just happens to correspond with the right lunar phase?


My Book of Common Prayer makes things easy by pointing out that "the
moon referred to in the definition of Easter Day is not the actual moon
of the heavens, but the Calendar Moon, or Moon of the Lunar Cycle, which
is counted as full on its fourteenth day, reckoned from the day of the
Calendar New Moon inclusive." Also, in a Bissextile Year "the number of
Sundays after Epiphany will be the same, as if Easter Day had fallen one
day later than it really does."


Which is why Easter and Passover rarely coincide -- we happen to have
had a spate of coincidence in recent years, but that'll soon be over.


What could be simpler?


The Muslim calendar -- no intercalated months, and no connection with
the solar year. So Ramadan drifts through the seasons.


Ramadan is celebrated according to the actual siting of the crescent,
not the (various) algorithms used for civil purposes, though I think
some "cheat" by using the algorithms (there are a couple most
frequently used). last time in Iraq the Shia and the Sunni observed it
at different dates. so it is rather complicated.-


They _do_ publish calendars that cover more than the next 29 1/2 days,
don't they? Such information _can_ be calculated (and was calculated


some allow calculation, but conservatives wait for a fatwa from the
religious authorities to commence Ramadan, and this is the practice in
many muslim countries. as I said before, in Iraq this resulted in the
Shia and the Sunni observing Ramadan with a days difference.for other
religious days, the algorithm may be used, but there are several
versions of that, some being more common than others.

3000 years ago in Mesopotamia), and varies from site to site depending
on latitude, weather, and surrounding terrain (i.e., where's the
horizon?).