From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mp11.migadu.com ([2001:41d0:2:bcc0::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by ms5.migadu.com with LMTPS id 4BTyCToe4WOc2AAAbAwnHQ (envelope-from ) for ; Mon, 06 Feb 2023 16:35:22 +0100 Received: from aspmx1.migadu.com ([2001:41d0:2:bcc0::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by mp11.migadu.com with LMTPS id gMDYCToe4WNpbQEA9RJhRA (envelope-from ) for ; Mon, 06 Feb 2023 16:35:22 +0100 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by aspmx1.migadu.com (Postfix) with ESMTPS id A9B0B309C1 for ; Mon, 6 Feb 2023 16:35:21 +0100 (CET) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pP3Vp-0007iZ-Ri; Mon, 06 Feb 2023 10:34:33 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pP3Vo-0007i9-BD for emacs-orgmode@gnu.org; Mon, 06 Feb 2023 10:34:32 -0500 Received: from mail.mojserwer.eu ([195.110.48.8]) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pP3Vm-0006ae-9x for emacs-orgmode@gnu.org; Mon, 06 Feb 2023 10:34:32 -0500 Received: from localhost (localhost [127.0.0.1]) by mail.mojserwer.eu (Postfix) with ESMTP id 5286E7F7AAE; Mon, 6 Feb 2023 16:34:22 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at mail.mojserwer.eu Received: from mail.mojserwer.eu ([127.0.0.1]) by localhost (mail.mojserwer.eu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 3uoV3Dgt7kTV; Mon, 6 Feb 2023 16:34:18 +0100 (CET) Received: from localhost (83.21.46.69.ipv4.supernova.orange.pl [83.21.46.69]) by mail.mojserwer.eu (Postfix) with ESMTPSA id 8CA5982EEC8; Mon, 6 Feb 2023 16:34:18 +0100 (CET) References: <3035CDD5-41DD-4516-9E4E-9E0DF16BE2E0@gmail.com> <87lelo8c9r.fsf@localhost> <2150768.1675077958@archlinux> <87tu063ox2.fsf@localhost> <87h6w63jgg.fsf@localhost> User-agent: mu4e 1.1.0; emacs 29.0.50 From: Marcin Borkowski To: Jean Louis Cc: tomas@tuxteam.de, emacs-orgmode@gnu.org Subject: Re: [POLL] Proposed syntax for timestamps with time zone info In-reply-to: Date: Mon, 06 Feb 2023 16:34:15 +0100 Message-ID: <877cwug64o.fsf@mbork.pl> MIME-Version: 1.0 Content-Type: text/plain Received-SPF: pass client-ip=195.110.48.8; envelope-from=mbork@mbork.pl; helo=mail.mojserwer.eu X-Spam_score_int: -25 X-Spam_score: -2.6 X-Spam_bar: -- X-Spam_report: (-2.6 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, 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=1675697721; h=from:from:sender:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:in-reply-to:in-reply-to: references:references:list-id:list-help:list-unsubscribe: list-subscribe:list-post; bh=LEtq4czeVwdyUsnQxU5XozaF3s7JDqpXlC7EDJnadPc=; b=h+/H0GEsFpYw5J3dNXbYe1MldkvZ+CJN/OFfo9Obmo8s+tt2OAOCmCU3h6SFO8qzacI3K1 w34h+ZL7yDIjUH4/t6KT59YvJ1msW5GHrlHN2Mc+jkkQKBBMTHOJdRWckHj80ei6Hn+VFZ nzElycd+O1ngyKaK9R+7tjZEUdcNyk+k27x/xU3P8gPdMCE17d1hDqvi7ne5DCswKMhmHu lffgTucuq+tNBopdGGXJAKQPP9bf2chApDvAvlqnqk1CKTPK6ol0HrcR9LgUBln0nyaeou uQT/6T3REZPgqmLmHhR8QA+V1h1kzMma+hN3E3Vt5aXlrhVRyfsUgo6Yqq4CRA== ARC-Authentication-Results: i=1; aspmx1.migadu.com; dkim=none; 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=none ARC-Seal: i=1; s=key1; d=yhetil.org; t=1675697721; a=rsa-sha256; cv=none; b=MCRHpgZpcBln75+Zd6FvmikREW/q78H8LMibBrvE1F2POTHq+XuTJrUTxyEwk+wxRAFL1Y BVg/pQDSbphtrtkfzQiWyCBte55eJ704MXUBsyIjCvn9ASmOoVk8Sl9BgVgbkqolPoIsUi LvpwXfTL6lXrnekGLQYA6V8uRKU7pcfqfMcFl8awGtOqfghAmThJY8bcGMQ/pO2oDAAwSH XQCF9zoFVfcQAjgrL4M3yMVnoxP72cYb8jJIyHmv7frq5pjln7tOejLVHeKNOnOGcNMhBM CSMICeVlsLtD6wrzEz6ZUSUfQCwZvvDrtBzWVmxao5n0Pp7TgH5gtVFaYHRP2Q== X-Migadu-Spam-Score: -1.49 X-Spam-Score: -1.49 X-Migadu-Queue-Id: A9B0B309C1 X-Migadu-Scanner: scn0.migadu.com Authentication-Results: aspmx1.migadu.com; dkim=none; 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=none X-TUID: xKJtwt/6r2lw Out of curiosity: in what time zone you were when you sent this??? On 2023-10-29, at 02:04, Jean Louis wrote: > * tomas@tuxteam.de [2023-02-01 12:22]: >> ...which stems from the fact that the very concept of "time zone" >> is somewhat ambiguous, too. > > For human who reads it without calculating anything, yes. > > For computer which is supposed to be programmed by using the time zone > database, no. > >> Some time zone designations carry the fact of whether they are >> supposed to be summer times or not with them (as with CET/CEST), >> some not (as above). The time zone database is only known for a >> limited time into future and may change with political >> vagaries. Yadda, yadda. > > Very right. > > At least the history is more certain than the future in regards to > time calculations with computer. -- Marcin Borkowski http://mbork.pl