From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Glenn Morris Newsgroups: gmane.emacs.bugs Subject: bug#20583: calendar-absolute-from-gregorian Date: Fri, 15 May 2015 20:54:04 -0400 Message-ID: <577fs9xryr.fsf@fencepost.gnu.org> References: NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: ger.gmane.org 1431737718 10415 80.91.229.3 (16 May 2015 00:55:18 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 16 May 2015 00:55:18 +0000 (UTC) Cc: 20583@debbugs.gnu.org, gjs@ai.mit.edu To: Nicholas Strauss Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sat May 16 02:55:09 2015 Return-path: Envelope-to: geb-bug-gnu-emacs@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 1YtQNf-0002Ac-NX for geb-bug-gnu-emacs@m.gmane.org; Sat, 16 May 2015 02:55:07 +0200 Original-Received: from localhost ([::1]:33302 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YtQNe-00088G-Kw for geb-bug-gnu-emacs@m.gmane.org; Fri, 15 May 2015 20:55:06 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:43993) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YtQNb-00085g-HP for bug-gnu-emacs@gnu.org; Fri, 15 May 2015 20:55:04 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YtQNa-00047q-M5 for bug-gnu-emacs@gnu.org; Fri, 15 May 2015 20:55:03 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:36661) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YtQNa-00047h-JD for bug-gnu-emacs@gnu.org; Fri, 15 May 2015 20:55:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1YtQNa-0006le-6F for bug-gnu-emacs@gnu.org; Fri, 15 May 2015 20:55:02 -0400 X-Loop: help-debbugs@gnu.org In-Reply-To: Resent-From: Glenn Morris Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 16 May 2015 00:55:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 20583 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 20583-submit@debbugs.gnu.org id=B20583.143173765225929 (code B ref 20583); Sat, 16 May 2015 00:55:02 +0000 Original-Received: (at 20583) by debbugs.gnu.org; 16 May 2015 00:54:12 +0000 Original-Received: from localhost ([127.0.0.1]:46633 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1YtQMl-0006k7-KZ for submit@debbugs.gnu.org; Fri, 15 May 2015 20:54:11 -0400 Original-Received: from fencepost.gnu.org ([208.118.235.10]:41298 ident=Debian-exim) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1YtQMj-0006jz-M1 for 20583@debbugs.gnu.org; Fri, 15 May 2015 20:54:10 -0400 Original-Received: from rgm by fencepost.gnu.org with local (Exim 4.71) (envelope-from ) id 1YtQMf-0007o0-4g; Fri, 15 May 2015 20:54:05 -0400 X-Spook: Fortezza Downing Street blackjack Ansar al-Islam pipeline X-Ran: Z]58wn\U>pf%/:^M{>UzkLme List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:102858 Archived-At: Nicholas Strauss wrote: > Why does (calendar-absolute-from-gregorian '(10 10 1582)) > return 577731? > (calendar-generate '(10 1582)) is another example of this > error. It's behaving as designed. It's a utility function that operates on the basis that today's calendar system is valid for all time. It's not meant as literally historically accurate, and I think trying to make it so (by introducing discontinuities at certain dates) would be a mistake. See eg thread at: http://lists.gnu.org/archive/html/emacs-devel/2006-07/msg01008.html