From: Edward Reingold <reingold@iit.edu>
To: jay.p.belanger@gmail.com
Cc: emacs-devel@gnu.org
Subject: Re: The Emacs Calculator and calendar
Date: Fri, 5 Oct 2012 15:51:06 -0500 [thread overview]
Message-ID: <CAO_04X4tKa0UfM6SZtyU3vwVcexR3mn5OqKo8LYdkXVjq16AGQ@mail.gmail.com> (raw)
In-Reply-To: <87y5jk3f7d.fsf@gmail.com>
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I would say it even more strongly: the Unix cal and the Emacs calc are
foolish chimeras; there
were hundreds of different dates of adoption of the Gregorian calendar,
stretching almost 400 years.
Emacs calendar does the only sane thing.
On Fri, Oct 5, 2012 at 2:13 PM, Jay Belanger <jay.p.belanger@gmail.com>wrote:
>
> Calc and the Emacs calendar use different calendar systems.
> From the Calc manual:
> Calc uses a combination of the Gregorian and Julian calendars,
> following the history of Great Britain and the British colonies.
> This is the same calendar that is used by the `cal' program in most
> Unix implementations.
> and from the Emacs manual:
> The Emacs calendar displayed is _always_ the Gregorian calendar,
> sometimes called the "new style" calendar, which is used in most of the
> world today. However, this calendar did not exist before the sixteenth
> century and was not widely used before the eighteenth century; it did
> not fully displace the Julian calendar and gain universal acceptance
> until the early twentieth century. The Emacs calendar can display any
> month since January, year 1 of the current era, but the calendar
> displayed is always the Gregorian, even for a date at which the
> Gregorian calendar did not exist.
> So, for example, the day before September 14, 1752 is
> September 2, 1752 according to Calc and September 13, 1752 according
> to the calendar.
>
> Is this acceptable, or should they be made consistent?
>
> Jay
>
>
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next prev parent reply other threads:[~2012-10-05 20:51 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 [this message]
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
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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