* phases-of-moon did not include fix for change of julian/gregorian calendar for dates < 15-OCT-1582
@ 2007-07-23 9:45 Frank Scherie
2007-07-23 22:30 ` Richard Stallman
0 siblings, 1 reply; 3+ messages in thread
From: Frank Scherie @ 2007-07-23 9:45 UTC (permalink / raw)
To: bug-gnu-emacs
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Hello,
trying to figure out lunar phase for 26-APR-1336 gives in emacs using
--------------------------------------
C-u M-x phase-o-moon
Year: 1336
Month: April
Thursday, March 22, 1336: New Moon 1:37am (CET)
Wednesday, March 28, 1336: First Quarter Moon 8:55pm (CEST)
Thursday, April 5, 1336: Full Moon 2:54am (CEST)
Friday, April 13, 1336: Last Quarter Moon 5:34am (CEST)
Friday, April 20, 1336: New Moon 12:48pm (CEST)
Friday, April 27, 1336: First Quarter Moon 3:28am (CEST)
Friday, May 4, 1336: Full Moon 5:39pm (CEST)
Saturday, May 12, 1336: Last Quarter Moon 9:22pm (CEST)
Saturday, May 19, 1336: New Moon 8:44pm (CEST)
Saturday, May 26, 1336: First Quarter Moon 11:26am (CEST)
--------------------------------------
while NASA 6000 Year lunar phase table gives for 1301-1400
<http://sunearth.gsfc.nasa.gov/eclipse/phase/phases1301.html>
--------------------------------------
Year New Moon First Quarter Full Moon Last Quarter ?T
1336 Jan 6 15:37 00h07m
Jan 14 19:52 Jan 22 04:59 Jan 28 22:06 Feb 5 12:21
Feb 13 11:35 Feb 20 12:29 Feb 27 10:56 Mar 6 08:49
Mar 14 00:31 H Mar 20 18:50 Mar 28 00:54 n Apr 5 03:24
Apr 12 10:42 Apr 19 01:23 Apr 26 15:39 May 4 19:12
May 11 18:39 May 18 09:22 May 26 06:43 Jun 3 07:52
Jun 10 01:20 Jun 16 19:41 Jun 24 21:42 Jul 2 17:34
Jul 9 07:59 Jul 16 08:49 Jul 24 12:20 Aug 1 00:54
Aug 7 15:51 Aug 15 00:48 Aug 23 02:24 Aug 30 06:53
Sep 6 01:57 H Sep 13 19:13 Sep 21 15:36 n Sep 28 12:50
Oct 5 14:54 Oct 13 15:12 Oct 21 03:47 Oct 27 20:09
Nov 4 06:44 Nov 12 11:17 Nov 19 15:04 Nov 26 06:02
Dec 4 00:54 Dec 12 05:39 Dec 19 01:47 Dec 25 19:01
----------------------------------------
Looks like "phases-of-moon" does not calculate julian/gregorian calendar
switch -
i.e. when date is earlier then 15 Oktober 1582 which is first date of
gregorian calendar.
emacs
----------------------------------------
Saturday, August 28, 1582: New Moon 7:54am (CEST)
Sunday, September 5, 1582: First Quarter Moon 11:49am (CEST)
Sunday, September 12, 1582: Full Moon 2:20pm (CEST)
Sunday, September 19, 1582: Last Quarter Moon 4:56am (CEST)
Sunday, September 26, 1582: New Moon 11:35pm (CEST)
Tuesday, October 5, 1582: First Quarter Moon 3:27am (CEST)
Monday, October 11, 1582: Full Moon 10:56pm (CEST)
~~~~~~~~~~~~~~~~~~ before 15-OCT-1582 results WRONG ~~~~~~~~~~
Monday, October 18, 1582: Last Quarter Moon 4:10pm (CEST)
Tuesday, October 26, 1582: New Moon 5:15pm (CEST)
----------------------------------------
NASA (1501-1600
<http://sunearth.gsfc.nasa.gov/eclipse/phase/phases1501.html>)
----------------------------------------
Year New Moon First Quarter Full Moon Last Quarter ?T
1582 Jan 1 14:59 Jan 8 22:23 p Jan 17 02:02 00h02m
Jan 24 08:56 Jan 30 23:59 Feb 7 16:08 Feb 15 20:26
Feb 22 19:21 Mar 1 10:47 Mar 9 10:02 Mar 17 11:05
Mar 24 04:08 Mar 30 23:42 Apr 8 02:55 Apr 15 21:43
Apr 22 12:04 Apr 29 14:31 May 7 18:04 May 15 04:52
May 21 20:11 May 29 06:41 Jun 6 07:11 n Jun 13 09:46
Jun 20 05:26 T Jun 27 23:40 Jul 5 18:18 n Jul 12 13:59
Jul 19 16:32 Jul 27 16:56 Aug 4 03:48 Aug 10 19:10
Aug 18 05:53 Aug 26 09:47 Sep 2 12:23 Sep 9 02:51
Sep 16 21:34 Sep 25 01:26 Oct 1 20:59 Oct 18 14:05
Oct 26 15:15 Nov 3 15:06 Nov 10 06:30 Nov 17 05:17
Nov 25 09:57 Dec 3 02:23 Dec 9 17:31 n Dec 17 00:03
Dec 25 04:09 A
----------------------------------------
cheers,
Frank Scherie
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: phases-of-moon did not include fix for change of julian/gregorian calendar for dates < 15-OCT-1582
[not found] <mailman.3784.1185188396.32220.bug-gnu-emacs@gnu.org>
@ 2007-07-23 17:27 ` Edward M. Reingold
0 siblings, 0 replies; 3+ messages in thread
From: Edward M. Reingold @ 2007-07-23 17:27 UTC (permalink / raw)
To: gnu-emacs-bug
>>>>> "FS" == Frank Scherie <frank.scherie@oracle.com> writes:
FS> Hello, trying to figure out lunar phase for 26-APR-1336 gives in emacs
All dates are given on the Grgeorian calendar. That is a feature, not a bug:
the adoption of the Gregorian calendar took place over many centuries, not all
at once as many people assume.
--
Professor Edward M. Reingold Email: reingold@iit.edu
Department of Computer Science Voice: (312) 567-3309
Illinois Institute of Technology Fax: (312) 567-5067
Stuart Building, 228F
10 West 31st Street
Chicago, IL 60616-3729 U.S.A.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: phases-of-moon did not include fix for change of julian/gregorian calendar for dates < 15-OCT-1582
2007-07-23 9:45 Frank Scherie
@ 2007-07-23 22:30 ` Richard Stallman
0 siblings, 0 replies; 3+ messages in thread
From: Richard Stallman @ 2007-07-23 22:30 UTC (permalink / raw)
To: Frank Scherie; +Cc: bug-gnu-emacs
Looks like "phases-of-moon" does not calculate julian/gregorian calendar
switch -
i.e. when date is earlier then 15 Oktober 1582 which is first date of
gregorian calendar.
That is right. You have to do that yourself.
This is documented in the manual, isn't it?
^ permalink raw reply [flat|nested] 3+ messages in thread
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2007-07-23 17:27 ` phases-of-moon did not include fix for change of julian/gregorian calendar for dates < 15-OCT-1582 Edward M. Reingold
2007-07-23 9:45 Frank Scherie
2007-07-23 22:30 ` Richard Stallman
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