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Re: The Emacs Calculator and calendar
From: |
Paul Eggert |
Subject: |
Re: The Emacs Calculator and calendar |
Date: |
Sun, 07 Oct 2012 11:23:02 -0700 |
User-agent: |
Mozilla/5.0 (X11; Linux i686; rv:15.0) Gecko/20120912 Thunderbird/15.0.1 |
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
- The Emacs Calculator and calendar, Jay Belanger, 2012/10/05
- Re: The Emacs Calculator and calendar, Paul Eggert, 2012/10/05
- Re: The Emacs Calculator and calendar, Edward Reingold, 2012/10/05
- Re: The Emacs Calculator and calendar, Pascal J. Bourguignon, 2012/10/05
- Re: The Emacs Calculator and calendar, Richard Stallman, 2012/10/06
- Re: The Emacs Calculator and calendar, Paul Eggert, 2012/10/06
- Re: The Emacs Calculator and calendar, Richard Stallman, 2012/10/06
- Re: The Emacs Calculator and calendar, Paul Eggert, 2012/10/07
- Re: The Emacs Calculator and calendar, Richard Stallman, 2012/10/07
- Re: The Emacs Calculator and calendar,
Paul Eggert <=
- Re: The Emacs Calculator and calendar, Richard Stallman, 2012/10/09
- Re: The Emacs Calculator and calendar, Eli Zaretskii, 2012/10/07
- Re: The Emacs Calculator and calendar, Paul Eggert, 2012/10/07
- Re: The Emacs Calculator and calendar, Eli Zaretskii, 2012/10/07
- Re: The Emacs Calculator and calendar, Juanma Barranquero, 2012/10/07
- Re: The Emacs Calculator and calendar, Eli Zaretskii, 2012/10/07
- Re: The Emacs Calculator and calendar, Richard Stallman, 2012/10/07
- Re: The Emacs Calculator and calendar, Juanma Barranquero, 2012/10/07
- Re: The Emacs Calculator and calendar, Sam Steingold, 2012/10/07
- Re: The Emacs Calculator and calendar, Richard Stallman, 2012/10/08