The perpetual calendar [Math]

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From: Brian M. Scott on 20 Feb 2010 12:32

On Sat, 20 Feb 2010 08:49:14 -0000, Androcles
<Headmaster(a)Hogwarts.physics_u> wrote in
<news:mmNfn.9989$X_6.9098(a)newsfe22.ams2> in
sci.math,sci.physics,sci.astro,sci.lang:

> "Brian M. Scott" <b.scott(a)csuohio.edu> wrote in message
> news:1s2uq5glt3lgu$.1m746rj1287gz$.dlg(a)40tude.net...

>> On Fri, 19 Feb 2010 16:12:09 -0800 (PST), Andrew Usher
>> <k_over_hbarc(a)yahoo.com> wrote in
>> <news:acc184f6-20cf-4ecf-8065-db72600e9c83(a)15g2000yqi.googlegroups.com>
>> in
>> sci.math,sci.physics,sci.astro,sci.lang,alt.usage.english:

>> [...]

>>> And the first day of the week is Sunday, not Monday - that
>>> is an incontrovertible fact.

>> Don't be ridiculous: it's merely a convention. For many of
>> us Monday is unquestionably the first day of the week.

> Which day is Mittwoch

The middle of the five-day work week.

> and which god is it holy to?

The great god Muddle, also known as Woden, Mercurius,
Buddha, Mother Sereda, and Hump.

[...]

From: Androcles on 20 Feb 2010 12:58

"Mike Dworetsky" <platinum198(a)pants.btinternet.com> wrote in message
news:EsednSDu7Im2jB3WnZ2dnUVZ7sGdnZ2d(a)bt.com...
> Androcles wrote:
>> "Mike Dworetsky" <platinum198(a)pants.btinternet.com> wrote in message
>> news:jc6dnUEvCLDSC-LWnZ2dnUVZ8tOdnZ2d(a)bt.com...
>>> Yusuf B Gursey wrote:
>>>> On Feb 19, 4:34 am, James Hogg <Jas.H...(a)gOUTmail.com> wrote:
>>>>> John Atkinson wrote:
>>>>>> Halmyre wrote:
>>>>>>> On 19 Feb, 04:58, "Ray O'Hara" <raymond-oh...(a)hotmail.com> wrote:
>>>>>>>> "Andrew Usher" <k_over_hb...(a)yahoo.com> wrote in message
>>>>>
>>>>>>>> news:65e2a2e7-1aef-4872-97a7-360fa6a10a6a(a)q21g2000yqm.googlegroups.com...
>>>>>
>>>>>>>>> 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."
>>>>
>>>> the Orthodox (Eastern) churches have a slightly different system.
>>>> dunno exactly what it is.
>>>>
>>>> http://en.wikipedia.org/wiki/Easter
>>>>
>>>> Easter
>>>
>>> Orthodox Easter and other events are based on the Julian Calendar
>>> (one year = 365.25 days), while Catholic and Protestant practice
>>> follows the Gregorian calendar (one year = 365.2425 days plus the
>>> 1582 dropping of 10 days). Over several centuries, the date of the
>>> spring equinox has drifted away from March 21 in the Orthodox
>>> calendar. The two religious systems have different methods for
>>> calculating
>>> Easter within their own calendars.
>>>
>>> Do a Google search for "calendar FAQ".
>>>
>> http://www.youtube.com/watch?v=VsD2Nku6Zqo
>> Over two millennia, the date of the spring equinox has drifted by a
>> month.
>
> Over 2000 years, the calendrical difference of 0.0075 d/yr adds up to 15
> days.

> In 1582, a correction of 10 days was done because the original agreement
> for the date of Easter was made not on AD1 but in AD325 at the Council of
> Nicea, so the accumulation over 1257 years was 9.4 days. I'm not certain
> why they dropped 10 days instead of 9; possibly because 1600 would not be
> a Gregorian leap year? Or possibly because the most prevalent date was
> already pretty much set by around AD200?
>
1 lunar month = 29.53059 days
"And the days of Methuselah were nine hundred sixty and nine years: and he
died." -- Genesis 5:27
969 lunar months = 74.5 years. If I were you I'd be very cautious of literal
translations of archaic timekeeping by the bell, book and candle brigade.

http://www.glyphweb.com/esky/constellations/aries.html
"Because of the effects of precession on the Earth, though, the First Point
of Aries moves through the sky, and in fact it left the constellation from
which it takes its name in about the year 70 BC, when it entered the
neighbouring constellation of Pisces. Nonetheless, it retains the name
'First Point of Aries'. Roughly 23,000 years from now, the Sun will have
completed its circuit of the zodiac, and the First Point will once again lie
among the stars from which it takes its name. "

Xmas is 3.5 days after the solstice, New Year is a week after Xmas, Easter
wanders about because it is tied to the Sunday sabbath, the Moslem sabbath
is a Friday noon prayer, Gawd put down his hod and trowel and rested on the
seventh day; the calendar is an unholy mess that has been meddled with by
priests of all religions, all of whom refuse to come to a consensus because
they all interpret their written texts differently
and what is written is holy in their sight.

The calendar shifts because the Earth precesses and if that is inconvenient
to Andrew Usher's Thanksgiving on a fourth Thor's (Norse god of
thunder) -day in the ninth month (Nov-ember) then too bad, Usher.

"Who will rid me of this meddlesome priest?" -- Henry II

From: Androcles on 20 Feb 2010 13:08

Fuckwit "R H Draney" <dadoctah(a)spamcop.net> snipped
in message news:hlp5d002463(a)drn.newsguy.com...

<gracious courtesy returned>

From: Adam Funk on 20 Feb 2010 15:27

On 2010-02-20, Brian M. Scott wrote:

> On Sat, 20 Feb 2010 08:49:14 -0000, Androcles
><Headmaster(a)Hogwarts.physics_u> wrote in
><news:mmNfn.9989$X_6.9098(a)newsfe22.ams2> in
> sci.math,sci.physics,sci.astro,sci.lang:
>
>> "Brian M. Scott" <b.scott(a)csuohio.edu> wrote in message
>> news:1s2uq5glt3lgu$.1m746rj1287gz$.dlg(a)40tude.net...

>>> Don't be ridiculous: it's merely a convention. For many of
>>> us Monday is unquestionably the first day of the week.
>
>> Which day is Mittwoch
>
> The middle of the five-day work week.

It should be renamed Wotanstag.

--
Unix is a user-friendly operating system. It's just very choosy about
its friends.

From: Adam Funk on 20 Feb 2010 15:22

On 2010-02-20, Brian M. Scott wrote:

> On Fri, 19 Feb 2010 16:12:09 -0800 (PST), Andrew Usher wrote:

>> And the first day of the week is Sunday, not Monday - that
>> is an incontrovertible fact.
>
> Don't be ridiculous: it's merely a convention. For many of
> us Monday is unquestionably the first day of the week.

From man 5 crontab:

When specifying day of week, both day 0 and day 7 will be
considered Sunday. BSD and AT&T seem to disagree about this.

--
Usenet is a cesspool, a dung heap. [Patrick A. Townson]