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[5.44.169.188]) by smtp.googlemail.com with ESMTPSA id d8-20020aa78148000000b00593906a8843sm3975009pfn.176.2023.02.04.07.44.09 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 04 Feb 2023 07:44:11 -0800 (PST) Message-ID: <94d92282-8a16-2e7c-acea-a112c9b3a22d@gmail.com> Date: Sat, 4 Feb 2023 22:44:06 +0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.4.2 Subject: Re: POSIX TS spec reverses the meaning of TZ offset compared to ISO Content-Language: en-US To: Heinz Tuechler , emacs-orgmode@gnu.org References: <2150768.1675077958@archlinux> <87tu063ox2.fsf@localhost> <87r0v9sio1.fsf@christianmoe.com> <87edr9lgq6.fsf@localhost> <87o7qdsf7h.fsf@christianmoe.com> <87v8kljz3n.fsf@localhost> <5dbbab8f-bec8-9272-2a07-b8e484b93c85@gmx.at> <42cb4a53-c293-5a25-c445-3c912bb028fb@gmail.com> <4966220d-6c4d-c144-1837-c415868de8bc@gmx.at> From: Max Nikulin In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=2607:f8b0:4864:20::533; envelope-from=manikulin@gmail.com; helo=mail-pg1-x533.google.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, NICE_REPLY_A=-0.09, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-orgmode@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "General discussions about Org-mode." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-orgmode-bounces+larch=yhetil.org@gnu.org Sender: emacs-orgmode-bounces+larch=yhetil.org@gnu.org X-Migadu-Country: US X-Migadu-Flow: FLOW_IN ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=yhetil.org; s=key1; t=1675525518; h=from:from:sender:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:list-id:list-help: list-unsubscribe:list-subscribe:list-post:dkim-signature; bh=5vuDR1Yo67hGGZISDwDQfnyuX9zWn9zFu6JeaQtpTgA=; b=sr+TVXejfD9rbirxX7baNQ4turahwwYvA6XVy0cTCQOHGMhEJ2do9B1CUHDmz7zSljP+xv b06mlIcwV8LxLZB2TppN11IXsMcdme6I3RiZP4jyuE77V34angmSj0qVLXGoaOg6gczK/3 5F38RUzztXh/Mki4o1ISLE6t9HyeSVKlbBfdtr/cX4lPLq7dlBF0dlLwe/nJMrQ3DHdHoV CKWBnfAla4LdpgXuRyWpqVwHRHZ/RqiXKobGu88q5tt89fF0WMVzDy2o1baOElxGnclE3D h+D+tkxGJ+2kUdFpShXrFr3t4LaecnQkjxgfKn9DGI9bECyHqIMrYYjOl61cdQ== ARC-Authentication-Results: i=1; aspmx1.migadu.com; dkim=fail ("headers rsa verify failed") header.d=gmail.com header.s=20210112 header.b="C5Esm/X3"; spf=pass (aspmx1.migadu.com: domain of "emacs-orgmode-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="emacs-orgmode-bounces+larch=yhetil.org@gnu.org"; dmarc=fail reason="SPF not aligned (relaxed)" header.from=gmail.com (policy=none) ARC-Seal: i=1; s=key1; d=yhetil.org; t=1675525518; a=rsa-sha256; cv=none; b=QUDmGW4fkO4WAh+oODNk9SZvEX6CV/fdKSc2MeeBgrQ4soeZX6Fgc51bLnKYGwIX5xOjtg p5sXpHdUxLulJZNj/EXXnEB4nDeH9SG+Iivz01nDZRFBeAYS6ImbX0iixpRpEXpS4AdS91 7Y8YzspSHvBBLtee6hFienVqRVTt00EovCFdY9jXx7YUrzeTewRsGl6rGDDNl6cDs1s1Ff 2YmsoAI6ZG3uNMXYtFjC4IcSXf6laccbwPdm0cTWrvZimn71pA/mmPsazFfZhikWWVGf2K U79+sVUAwy4vXj+7m9dKqRi2edbLw+14mos0HjasK+QyzLHXgRDQ3KOtu+zFEQ== X-Migadu-Spam-Score: -1.78 X-Spam-Score: -1.78 X-Migadu-Queue-Id: D76852DD11 Authentication-Results: aspmx1.migadu.com; dkim=fail ("headers rsa verify failed") header.d=gmail.com header.s=20210112 header.b="C5Esm/X3"; spf=pass (aspmx1.migadu.com: domain of "emacs-orgmode-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="emacs-orgmode-bounces+larch=yhetil.org@gnu.org"; dmarc=fail reason="SPF not aligned (relaxed)" header.from=gmail.com (policy=none) X-Migadu-Scanner: scn1.migadu.com X-TUID: 4k5dx0zerSze On 02/02/2023 16:37, Heinz Tuechler wrote: > tomas wrote/hat geschrieben on/am 02.02.2023 09:33: >> On Thu, Feb 02, 2023 at 08:45:51AM +0100, Heinz Tuechler wrote: >>> It seems to me that this shows the time zone I selected at set up of the >>> computer, in my case Europe/Berlin. Using package lutz in R with correct >>> coordinates I see Europe/Vienna, based on open street map. >>> Days ago I did not even know that Berlin and Vienna are in different >>> time zones. It is not uncommon problem. People set a time zone having the same offset and later complain that historical data can not be trusted. Ubuntu guesses timezone likely using their GeoIP service. For me it works correctly. Approach implemented in Debian installer can be called at least questionable. They allows to choose from incomplete subset of time zones that is based on locale (selected several steps before). Developers refuse requests to add an option with complete list of time zones. So some users either finishes with incorrect time zone or have to run dpkg-reconfigure tzdata. I forgot to mention some methods to guess location and so time zone when I was writing https://list.orgmode.org/orgmode/tqj9af$vhk$1@ciao.gmane.io/ >> Vienna is special :) There is no reason to add a timezone if there is nothing special. zdump -v Europe/Berlin Europe/Berlin Sun Sep 28 00:59:59 1980 UT = Sun Sep 28 02:59:59 1980 CEST isdst=1 gmtoff=7200 Europe/Berlin Sun Sep 28 01:00:00 1980 UT = Sun Sep 28 02:00:00 1980 CET isdst=0 gmtoff=3600 zdump -v Europe/Vienna Europe/Vienna Sat Sep 27 21:59:59 1980 UT = Sat Sep 27 23:59:59 1980 CEST isdst=1 gmtoff=7200 Europe/Vienna Sat Sep 27 22:00:00 1980 UT = Sat Sep 27 23:00:00 1980 CET isdst=0 gmtoff=3600 03:00 -> 02:00 vs 24:00 -> 23:00 transition time.