From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Edward Reingold Newsgroups: gmane.emacs.devel Subject: Re: The Emacs Calculator and calendar Date: Fri, 5 Oct 2012 16:17:34 -0500 Message-ID: References: <87y5jk3f7d.fsf@gmail.com> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary=485b390f7a24b89e3504cb5667ab X-Trace: ger.gmane.org 1349471883 21741 80.91.229.3 (5 Oct 2012 21:18:03 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 5 Oct 2012 21:18:03 +0000 (UTC) Cc: emacs-devel@gnu.org To: jay.p.belanger@gmail.com Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri Oct 05 23:18:09 2012 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1TKFHa-0002Po-H3 for ged-emacs-devel@m.gmane.org; Fri, 05 Oct 2012 23:18:06 +0200 Original-Received: from localhost ([::1]:42457 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TKFHU-0003NG-Kw for ged-emacs-devel@m.gmane.org; Fri, 05 Oct 2012 17:18:00 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:46455) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TKFHR-0003FL-3Y for emacs-devel@gnu.org; Fri, 05 Oct 2012 17:17:57 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TKFHP-0002K5-Uu for emacs-devel@gnu.org; Fri, 05 Oct 2012 17:17:56 -0400 Original-Received: from mail-la0-f41.google.com ([209.85.215.41]:60419) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TKFHP-0002Ju-N2 for emacs-devel@gnu.org; Fri, 05 Oct 2012 17:17:55 -0400 Original-Received: by mail-la0-f41.google.com with SMTP id p5so1237324lag.0 for ; Fri, 05 Oct 2012 14:17:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:from:date :x-google-sender-auth:message-id:subject:to:cc:content-type; bh=qqv/Wf6ZOpuH3sJALv33WOLNvfQvg8YUQUg1n9Jnm24=; b=zAfpTx6mqQaiEv4nq2AhmJvRlMdPWtLmwnfGlbbgyopQABd4jJa6bTol+gCuXsO1xy ruwhxg/4ZlLpY74ol2ahwcKPK271EZusjBOXJNwJ3KuSj3ylL0o25FBmiaoy9+Ndgv0N uBwMmKgRFQEAuWTKX/NfVwGuP8LByuATomToEWZSS6pl5cUwzgQj6S5+Cp5k9md+ENlN ktZ9YUM5BHLenKii6l8AO/vmkyEXWpfGMNl1wsXNfYztP2nI1TQbyLAuaWMgxnRN3sRC s46DUYvQLmykoYLR3Injb4r56c0C6Hu+9daws4z2dOimMQ37KXpsoXUHCfPlFEkI4Ez4 SQwA== Original-Received: by 10.112.39.41 with SMTP id m9mr4243012lbk.80.1349471874620; Fri, 05 Oct 2012 14:17:54 -0700 (PDT) Original-Received: by 10.112.38.73 with HTTP; Fri, 5 Oct 2012 14:17:34 -0700 (PDT) In-Reply-To: <87y5jk3f7d.fsf@gmail.com> X-Google-Sender-Auth: vJz6fyIiTSC_gLrkRGJueJ3gBUY X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 209.85.215.41 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:154107 Archived-At: --485b390f7a24b89e3504cb5667ab Content-Type: text/plain; charset=ISO-8859-1 Of course, the Julian calendar is available in Emacs, as are the Hebrew, Chinese, etc. On Fri, Oct 5, 2012 at 2:13 PM, Jay Belanger 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 > > --485b390f7a24b89e3504cb5667ab Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Of course, the Julian calendar is available in Emacs, as are the Hebrew, Ch= inese, etc.

On Fri, Oct 5, 2012 at 2:13 P= M, Jay Belanger <jay.p.belanger@gmail.com> wrote:

Calc and the Emacs calendar use different calendar systems.
>From the Calc manual:
=A0 Calc uses a combination of the Gregorian and Julian calendars,
=A0 following the history of Great Britain and the British colonies.
=A0 This is the same calendar that is used by the `cal' program in most=
=A0 Unix implementations.
and from the Emacs manual:
=A0 The Emacs calendar displayed is _always_ the Gregorian calendar,
=A0 sometimes called the "new style" calendar, which is used in m= ost of the
=A0 world today. =A0However, this calendar did not exist before the sixteen= th
=A0 century and was not widely used before the eighteenth century; it did =A0 not fully displace the Julian calendar and gain universal acceptance =A0 until the early twentieth century. =A0The Emacs calendar can display an= y
=A0 month since January, year 1 of the current era, but the calendar
=A0 displayed is always the Gregorian, even for a date at which the
=A0 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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