From: Paul Eggert <eggert@cs.ucla.edu>
To: rms@gnu.org
Cc: jay.p.belanger@gmail.com, reingold@iit.edu, emacs-devel@gnu.org
Subject: Re: The Emacs Calculator and calendar
Date: Sun, 07 Oct 2012 11:23:02 -0700 [thread overview]
Message-ID: <5071C886.8050504@cs.ucla.edu> (raw)
In-Reply-To: <E1TKugl-0002Bt-UF@fencepost.gnu.org>
On 10/07/2012 10:30 AM, Richard Stallman wrote:
> you're making some distinction that you
> have not explained. Please explain your distinction
The Julian calendar comes in many flavors, the details matter for
Emacs's purposes, and the flavor that England used before
1752 disagrees with the flavor reported by Emacs calc and
Unix cal.
Here are the two calendars in question for 1748, to give you an idea
of what's going on. The two years have differing start and end dates,
and have differing numbers of days (one has 365 days, the other 366).
1748 in England and British colonies
March
Su Mo Tu We Th Fr Sa
25 26
27 28 29 30 31
April May June
Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa
1 2 1 2 3 4 5 6 7 1 2 3 4
3 4 5 6 7 8 9 8 9 10 11 12 13 14 5 6 7 8 9 10 11
10 11 12 13 14 15 16 15 16 17 18 19 20 21 12 13 14 15 16 17 18
17 18 19 20 21 22 23 22 23 24 25 26 27 28 19 20 21 22 23 24 25
24 25 26 27 28 29 30 29 30 31 26 27 28 29 30
July August September
Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa
1 2 1 2 3 4 5 6 1 2 3
3 4 5 6 7 8 9 7 8 9 10 11 12 13 4 5 6 7 8 9 10
10 11 12 13 14 15 16 14 15 16 17 18 19 20 11 12 13 14 15 16 17
17 18 19 20 21 22 23 21 22 23 24 25 26 27 18 19 20 21 22 23 24
24 25 26 27 28 29 30 28 29 30 31 25 26 27 28 29 30
31
October November December
Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa
1 1 2 3 4 5 1 2 3
2 3 4 5 6 7 8 6 7 8 9 10 11 12 4 5 6 7 8 9 10
9 10 11 12 13 14 15 13 14 15 16 17 18 19 11 12 13 14 15 16 17
16 17 18 19 20 21 22 20 21 22 23 24 25 26 18 19 20 21 22 23 24
23 24 25 26 27 28 29 27 28 29 30 25 26 27 28 29 30 31
30 31
January February March
Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa
1 2 3 4 5 6 7 1 2 3 4 1 2 3 4
8 9 10 11 12 13 14 5 6 7 8 9 10 11 5 6 7 8 9 10 11
15 16 17 18 19 20 21 12 13 14 15 16 17 18 12 13 14 15 16 17 18
22 23 24 25 26 27 28 19 20 21 22 23 24 25 19 20 21 22 23 24
29 30 31 26 27 28
1748 according to Emacs calc and Unix cal
January February March
Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa
1 2 1 2 3 4 5 6 1 2 3 4 5
3 4 5 6 7 8 9 7 8 9 10 11 12 13 6 7 8 9 10 11 12
10 11 12 13 14 15 16 14 15 16 17 18 19 20 13 14 15 16 17 18 19
17 18 19 20 21 22 23 21 22 23 24 25 26 27 20 21 22 23 24 25 26
24 25 26 27 28 29 30 28 29 27 28 29 30 31
31
April May June
Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa
1 2 1 2 3 4 5 6 7 1 2 3 4
3 4 5 6 7 8 9 8 9 10 11 12 13 14 5 6 7 8 9 10 11
10 11 12 13 14 15 16 15 16 17 18 19 20 21 12 13 14 15 16 17 18
17 18 19 20 21 22 23 22 23 24 25 26 27 28 19 20 21 22 23 24 25
24 25 26 27 28 29 30 29 30 31 26 27 28 29 30
July August September
Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa
1 2 1 2 3 4 5 6 1 2 3
3 4 5 6 7 8 9 7 8 9 10 11 12 13 4 5 6 7 8 9 10
10 11 12 13 14 15 16 14 15 16 17 18 19 20 11 12 13 14 15 16 17
17 18 19 20 21 22 23 21 22 23 24 25 26 27 18 19 20 21 22 23 24
24 25 26 27 28 29 30 28 29 30 31 25 26 27 28 29 30
31
October November December
Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa
1 1 2 3 4 5 1 2 3
2 3 4 5 6 7 8 6 7 8 9 10 11 12 4 5 6 7 8 9 10
9 10 11 12 13 14 15 13 14 15 16 17 18 19 11 12 13 14 15 16 17
16 17 18 19 20 21 22 20 21 22 23 24 25 26 18 19 20 21 22 23 24
23 24 25 26 27 28 29 27 28 29 30 25 26 27 28 29 30 31
30 31
next prev parent reply other threads:[~2012-10-07 18:23 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-05 19:13 The Emacs Calculator and calendar Jay Belanger
2012-10-05 19:24 ` Paul Eggert
2012-10-05 20:51 ` Edward Reingold
2012-10-05 21:14 ` Pascal J. Bourguignon
2012-10-06 15:41 ` Richard Stallman
2012-10-06 22:07 ` Paul Eggert
2012-10-07 3:49 ` Richard Stallman
2012-10-07 6:22 ` Paul Eggert
2012-10-07 17:30 ` Richard Stallman
2012-10-07 18:23 ` Paul Eggert [this message]
2012-10-10 3:37 ` Richard Stallman
2012-10-07 6:36 ` Eli Zaretskii
2012-10-07 7:50 ` Paul Eggert
2012-10-07 8:45 ` Eli Zaretskii
2012-10-07 13:01 ` Juanma Barranquero
2012-10-07 14:08 ` Eli Zaretskii
2012-10-07 17:30 ` Richard Stallman
2012-10-07 17:57 ` Juanma Barranquero
2012-10-07 21:55 ` Sam Steingold
2012-10-08 13:39 ` Richard Stallman
2012-10-07 8:17 ` Stephen J. Turnbull
2012-10-07 7:56 ` Achim Gratz
2012-10-07 8:44 ` Eli Zaretskii
2012-10-07 13:57 ` Stefan Monnier
2012-10-07 20:32 ` Paul Eggert
2012-10-07 21:34 ` Tim Cross
2012-10-08 0:32 ` Stefan Monnier
2012-10-08 6:30 ` Paul Eggert
2012-10-08 7:28 ` Ulrich Mueller
2012-10-08 13:56 ` Stefan Monnier
2012-10-08 14:49 ` Jay Belanger
2012-10-08 8:21 ` James Cloos
2012-10-08 14:59 ` Jay Belanger
2012-10-13 6:02 ` Paul Eggert
2012-10-13 14:05 ` Jay Belanger
2012-10-08 13:39 ` Richard Stallman
2012-10-08 19:34 ` Paul Eggert
2012-10-08 22:39 ` Richard Stallman
2012-10-09 6:28 ` Paul Eggert
2012-10-09 15:47 ` Richard Stallman
2012-10-09 23:10 ` Paul Eggert
2012-10-10 2:22 ` Jay Belanger
2012-10-11 12:09 ` Jason Rumney
2012-10-12 1:52 ` Richard Stallman
2012-10-10 3:37 ` Richard Stallman
2012-10-10 21:42 ` Christoph Herzog
2012-10-05 21:17 ` Edward Reingold
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