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Author Topic: Easter Sunday computation  (Read 20642 times)
oracle
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« Reply #30 on: June 17, 2003, 02:47:24 AM »

I haven't tried the routine, running Linux for my QB most of the time and all, and I simply don't have enough time (unless you would like me to host your routine on QBNZ...
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toonski84
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« Reply #31 on: June 17, 2003, 03:02:21 AM »

My bad, my bad.  I thought it ended on Palm Sunday, but I wasnt sure (i stopped giving up things when I was 10, yeah, i know i'm going to hell) so I checked this( http://www.kencollins.com/holy-04.htm ) website, which is apparently full of crap.  But my mistake Smiley
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Antoni Gual
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« Reply #32 on: June 17, 2003, 10:11:49 AM »

Spanish carnival starts on Thursday before ash Wednesday, in Barcelona we call it Dijous Gras (greasy Thursday)  it's the day schoolchildren celebrate their carnival, and it's a tradition to eat omelettes or sausages with egg added.
Tuesday before Ash Wednesday it's the Entierro de la Sardina, (Burial of the Sardine), a simbol of the end of the carnival and the start of the fast.

I have found a well documented page about Easter related feasts (you can start 60 days before and end 60 days after!!) It includes an applet calculating Easter date.
http:////www.smart.net/~mmontes/ec-cal.html
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Antoni
Moneo
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« Reply #33 on: June 17, 2003, 01:22:57 PM »

Quote from: "toonski84"
My bad, my bad.  I thought it ended on Palm Sunday, but I wasnt sure (i stopped giving up things when I was 10, yeah, i know i'm going to hell) so I checked this( http://www.kencollins.com/holy-04.htm ) website, which is apparently full of crap.  But my mistake Smiley


I checked out the site of ths Rev. Collins. He's got a few thinks messed up, so I wrote him an email.

My 20 year old son said to me recently "Be careful, the Internet is not a source of information".
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Moneo
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« Reply #34 on: June 17, 2003, 01:31:11 PM »

Yes, you will find that the celebartion of carnival varies from place to place. Some move the date drastically so as to have their very own carnival which does not coincide with others.

I checked out the site you provided. It's very good altough some of the explanations are a bit verbose. The calculation of Easter and related dates looks good. I verified a few dates and they coincide.

Thanks again, Antoni.
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Moneo
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« Reply #35 on: June 17, 2003, 10:16:39 PM »

I downloaded 3 algorithms from the mmontes site you provided. Then I ran them in parallel with my version inside the same program, comparing every Easter calculated between 1583 and 9999. These are the results:

MONTES version (which is taken from Mallen's table approach): Matched my results 100%, but only ran it up to 4099 'cause that's what the specs said.

BUTCHER version ( I think someone on the forum had this): Matched my results 100%.

OUDIN version: totally wrong results.

I hope this gives my version a vote of confidence.
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oracle
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« Reply #36 on: June 18, 2003, 02:22:54 AM »

Hey Mr Moneo... there is an 'edit' button up the top right of your post, ok? Triple posts are not cool  Tongue
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Moneo
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« Reply #37 on: June 18, 2003, 03:31:28 PM »

Toonski,
It turns out you were right, Lent begins on Ash Wednesday and goes for 40 days excluding Sundays. This makes the actual ending date a little nebulous, and there are many disagreements, but that's the way it is.
P.S. I also apologized to Rev. Collins.

However, for an arithmetic method of computing the date of Ash Wednesday, my previous formula still stands, which is:
a) The date of Palm Sunday minus 39 days, or
b) The date of Easter minus 46 days.
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Moneo
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« Reply #38 on: June 18, 2003, 03:39:22 PM »

Quote from: "oracle"
Hey Mr Moneo... there is an 'edit' button up the top right of your post, ok? Triple posts are not cool  Tongue


Sorry, but I dont know what the "edit" button is. Tell me when and how I should use it.

Yes I did 3 posts in a row. I was answering specific posts of other people. How should I do this in the future?
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Agamemnus
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« Reply #39 on: June 18, 2003, 04:13:14 PM »

like this:
Mr Bla1: blablabla.
Mr Bla2: blAblabla
Mr bla 3: bla....

On the upper right of each post there is a quote, an edit button and sometimes a delete button. (X) You can only edit when you're signed in..
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oracle
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« Reply #40 on: June 19, 2003, 06:52:25 PM »

That's the one. There is also an FAQ button up the top of your screen, to the left of Search and above Profile (NOT the underlined one). That should help.

Sorry if I sound a little rude, Mr Moneo...
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Moneo
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« Reply #41 on: June 19, 2003, 10:44:38 PM »

No problem. Actually, thanks for your help.
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Moneo
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« Reply #42 on: June 20, 2003, 03:36:08 PM »

Well friends, I think we have pretty much gone as far with this topic as we are apparently going to get. No sense in beating a dead horse.

I personally have acquired additional knowledge on the Easter date subject, just by having to answer some of your questions, and reviewing the websites that you provided.

I get the impression that most of you have never actually tested the coded algorithm, and several of you got into this topic just to kibitz.

You might consider looking into this subject further. The calculation of Easter is an issue that has concerned mathematicians and astronomers for more than 500 years.  Beware of algorithms that appear all over the place on the internet. Contrary to what you will see mentioned, there is no definitive solution. Carefully take into consideration the source of the information. Some sites use well accepted algorithms, but their particular implementation is full of bugs. If you find one you like, check it out first. Run it in parallel with at least 2 others to make sure that it gives the same Easter date for the years 1583-9999, or at least 1583-4099.  Another source of Easter dates from 1901-2100 is the World Almanac.

If you have any additional comments on the subject, please write me a PM.

Thanks.
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HystericPoison
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« Reply #43 on: June 21, 2003, 08:23:01 PM »

Quote from: "toonski84"
My bad, my bad.  I thought it ended on Palm Sunday, but I wasnt sure (i stopped giving up things when I was 10, yeah, i know i'm going to hell) so I checked this( http://www.kencollins.com/holy-04.htm ) website, which is apparently full of crap.  But my mistake Smiley


we were supposed to give something up?

good thing im atheist   :evil:
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Ninkazu
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« Reply #44 on: June 21, 2003, 08:46:44 PM »

Quote from: "HystericPoison"
good thing im atheist   :evil:


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am an asshole. Get used to it.
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