From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Pascal Quesseveur Newsgroups: gmane.emacs.help Subject: Questions about encode-time and decode-time Date: Tue, 23 Mar 2021 18:11:35 +0100 Organization: Les Enchantements de Miraldra Message-ID: <82blb9dcc8.fsf@gmail.com> Reply-To: pquessev@gmail.com Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="33300"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.1 (windows-nt) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:Fw15yDV6P3dy8zgwkKDWfhZx5Is= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Tue Mar 23 19:13:46 2021 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lOlXF-0008YE-Sm for geh-help-gnu-emacs@m.gmane-mx.org; Tue, 23 Mar 2021 19:13:45 +0100 Original-Received: from localhost ([::1]:55738 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lOlXE-00014L-RS for geh-help-gnu-emacs@m.gmane-mx.org; Tue, 23 Mar 2021 14:13:44 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:35164) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lOkVt-0001iI-Bs for help-gnu-emacs@gnu.org; Tue, 23 Mar 2021 13:08:17 -0400 Original-Received: from ciao.gmane.io ([116.202.254.214]:42924) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lOkVr-0002QZ-TC for help-gnu-emacs@gnu.org; Tue, 23 Mar 2021 13:08:17 -0400 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1lOkVp-0002w1-Uv for help-gnu-emacs@gnu.org; Tue, 23 Mar 2021 18:08:13 +0100 X-Injected-Via-Gmane: http://gmane.org/ X-Attribution: PQsr Received-SPF: pass client-ip=116.202.254.214; envelope-from=geh-help-gnu-emacs@m.gmane-mx.org; helo=ciao.gmane.io X-Spam_score_int: 5 X-Spam_score: 0.5 X-Spam_bar: / X-Spam_report: (0.5 / 5.0 requ) BAYES_00=-1.9, DKIM_ADSP_CUSTOM_MED=0.001, FORGED_GMAIL_RCVD=1, FREEMAIL_FORGED_FROMDOMAIN=0.25, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.249, NML_ADSP_CUSTOM_MED=0.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.io gmane.emacs.help:128533 Archived-At: Hello, Due to an error in decoding a date in a Vcalendar apointment, I tried to understand the coding and decoding of time values. I ended up with these tests: (decode-time (encode-time (list 0 30 9 13 3 2021 nil -1 "STD-01:00DST-02:00,M3.5.0/02:00:00,M10.5.0/03:00:00"))) -> (0 30 9 13 3 2021 3 nil 3600) (decode-time (encode-time (list 0 30 9 14 3 2021 nil -1 "STD-01:00DST-02:00,M3.5.0/02:00:00,M10.5.0/03:00:00"))) -> (0 30 8 14 3 2021 5 nil 3600) (decode-time (encode-time (list 0 30 9 27 3 2021 nil -1 "STD-01:00DST-02:00,M3.5.0/02:00:00,M10.5.0/03:00:00"))) -> (0 30 8 27 3 2021 6 nil 3600) (decode-time (encode-time (list 0 30 9 28 3 2021 nil -1 "STD-01:00DST-02:00,M3.5.0/02:00:00,M10.5.0/03:00:00"))) -> (0 30 9 28 3 2021 0 t 7200) I don't understand why I get 8:30 from march 14 to 27. My config is Emacs 27.1 (x86_64-w64-mingw32) on a french Windows 10 system. I checked with emacs -Q. -- Pascal Quesseveur pquessev@gmail.com