From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mp12.migadu.com ([2001:41d0:2:4a6f::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by ms5.migadu.com with LMTPS id WKQDFHWJ2mPcswAAbAwnHQ (envelope-from ) for ; Wed, 01 Feb 2023 16:47:01 +0100 Received: from aspmx1.migadu.com ([2001:41d0:2:4a6f::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by mp12.migadu.com with LMTPS id 2JHSE3WJ2mNvdAEAauVa8A (envelope-from ) for ; Wed, 01 Feb 2023 16:47:01 +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 2EB3E7DCB for ; Wed, 1 Feb 2023 16:47:01 +0100 (CET) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pNFJD-0003kh-Qi; Wed, 01 Feb 2023 10:46:03 -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 1pNFIx-0003Ln-Tp for emacs-orgmode@gnu.org; Wed, 01 Feb 2023 10:45:48 -0500 Received: from stw1.rcdrun.com ([217.170.207.13]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pNFIq-0001rD-W0 for emacs-orgmode@gnu.org; Wed, 01 Feb 2023 10:45:43 -0500 Received: from localhost ([::ffff:197.239.7.190]) (AUTH: PLAIN admin, TLS: TLS1.3,256bits,ECDHE_RSA_AES_256_GCM_SHA384) by stw1.rcdrun.com with ESMTPSA id 0000000000103957.0000000063DA8923.0000519F; Wed, 01 Feb 2023 08:45:39 -0700 Date: Sun, 29 Oct 2023 04:04:43 +0300 From: Jean Louis To: tomas@tuxteam.de Cc: emacs-orgmode@gnu.org Subject: Re: [POLL] Proposed syntax for timestamps with time zone info Message-ID: Mail-Followup-To: tomas@tuxteam.de, emacs-orgmode@gnu.org References: <3035CDD5-41DD-4516-9E4E-9E0DF16BE2E0@gmail.com> <87lelo8c9r.fsf@localhost> <2150768.1675077958@archlinux> <87tu063ox2.fsf@localhost> <87h6w63jgg.fsf@localhost> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Content-Disposition: inline In-Reply-To: User-Agent: Mutt/2.2.9+54 (af2080d) (2022-11-21) Received-SPF: pass client-ip=217.170.207.13; envelope-from=bugs@gnu.support; helo=stw1.rcdrun.com X-Spam_score_int: -17 X-Spam_score: -1.8 X-Spam_bar: - X-Spam_report: (-1.8 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_SBL=0.141, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_DATE_IN_FUTURE_Q_PLUS=0.01 autolearn=no 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-Seal: i=1; s=key1; d=yhetil.org; t=1675266421; a=rsa-sha256; cv=none; b=dprOIS/7nQZTpo55X4TLInOAAaZBsCD6l5HawgA3Zv2ARE2x6eemZhVNOkEmyLsb24SyIQ Wt3Ex6ythVWKT20CcEbHAFwkoR/U60Z6qkhOeRzQ2pmnWAr/R62eDzlPEi7goy3nkqUfCF I2lxsFCeGlbzMWkpc/hrGHscehFGm0rKM/ReSLh8fgF6PZkdBJDrpwF+g+ZFcC31XmogNn XeRPvESuhctgPxMBjaFVndlvS/l5G1+h6fBoqQgX7dymomTfgK6pKFFpa19hIDzYsc1Jhi xlElR9j7IKhvhdB4E9NkIi5jVjxMaGewm+APhCAy+NUZlSZrZZotm0i+EqB26A== 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-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=yhetil.org; s=key1; t=1675266421; 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: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:list-id:list-help: list-unsubscribe:list-subscribe:list-post; bh=jwe54WxkWfP4VbR7P4I+Vzn9z/rEGhyBNMourq78OME=; b=kOQHs3NTjaaTRwFvG0f3U54zHxUOG1Yk98L+wJTCCrbLMvpZeVWfw/SUrb64E3AVSKZAfY kBV6PXnr+On6JGuWpUguLtXiEIq3Ia7NMQSeVB3zmCJSfEsDHj4GXBcIUuTmBpf/aLv8eQ uOq0Dv0Mp3tBfdtKnfJEFGt6Xevzjl5gQ4Dy+bbqPanzSo7Fw7QDaoVFRZONMgYFzAFKUI 028FR4mrWNkxZ8TskluWEeHC98mc67BAk6uDlbNQ/HfZZHNk7lkLQzNnVEmz7k+tag+sr2 iCwnkj8rb8tnOtig5RALkbLAPBaX+k5CMXlTyvdtGsqgkvjLz+D/CIsOtH7PQw== 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-Migadu-Scanner: scn1.migadu.com X-Migadu-Spam-Score: 6.42 X-Spam-Score: 6.42 X-Migadu-Queue-Id: 2EB3E7DCB X-TUID: 0hZHOIo7ihfW * 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. -- Jean Take action in Free Software Foundation campaigns: https://www.fsf.org/campaigns In support of Richard M. Stallman https://stallmansupport.org/