From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Jay Belanger Newsgroups: gmane.emacs.devel Subject: The Emacs Calculator and calendar Date: Fri, 05 Oct 2012 14:13:10 -0500 Message-ID: <87y5jk3f7d.fsf@gmail.com> Reply-To: jay.p.belanger@gmail.com NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1349464398 23130 80.91.229.3 (5 Oct 2012 19:13:18 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 5 Oct 2012 19:13:18 +0000 (UTC) Cc: jay.p.belanger@gmail.com To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri Oct 05 21:13:24 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 1TKDKu-0005lB-MV for ged-emacs-devel@m.gmane.org; Fri, 05 Oct 2012 21:13:24 +0200 Original-Received: from localhost ([::1]:37728 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TKDKo-0000Al-Rq for ged-emacs-devel@m.gmane.org; Fri, 05 Oct 2012 15:13:18 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:37516) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TKDKm-0000AK-2t for emacs-devel@gnu.org; Fri, 05 Oct 2012 15:13:16 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TKDKk-0004dV-PU for emacs-devel@gnu.org; Fri, 05 Oct 2012 15:13:16 -0400 Original-Received: from mail-ie0-f169.google.com ([209.85.223.169]:60002) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TKDKk-0004dR-Ke for emacs-devel@gnu.org; Fri, 05 Oct 2012 15:13:14 -0400 Original-Received: by mail-ie0-f169.google.com with SMTP id 10so5584607ied.0 for ; Fri, 05 Oct 2012 12:13:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:subject:reply-to:cc:date:message-id:mime-version :content-type; bh=vTyVovHwTd0i8AxlhcIaxvreusCxkvt+h0wIOWC7FPE=; b=JhoSgcaLZhhrVjY1Xytbo1zZCCjkIJc+OHfnGoySv7UuprJyJNqrWubmiTmEKvUVc9 Bcv/UlIZ9LWE8eSIUkKgd8/UnLkR8/Tr9TQQFncThxWcMGNDH3vJZhWI3ynbNY5VeWbk 1hRa7+V1U6VHzwjMvE3kMV9n6WIDUJgqwm5Vg9ADDH8RoMvAwEqbSp7keif6H1EqK7Xl heb4zT1qTbhNC92yYGPKCWrIRsdmoGvOEt0YmPC1BX1u5mJpIUmXswvoSHcGwR4imI3j t0gvy//9N2PgNY/gNO807/0vdRH2hzOyObXh77SV3u9wtGdhZ3mdI9mc63r1DsscMiVC Tkfg== Original-Received: by 10.50.220.161 with SMTP id px1mr2127362igc.27.1349464393561; Fri, 05 Oct 2012 12:13:13 -0700 (PDT) Original-Received: from belanger-office (vh213601.truman.edu. [150.243.162.59]) by mx.google.com with ESMTPS id gw10sm1317676igb.17.2012.10.05.12.13.11 (version=TLSv1/SSLv3 cipher=OTHER); Fri, 05 Oct 2012 12:13:12 -0700 (PDT) X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 209.85.223.169 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:154097 Archived-At: 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