From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mp11.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 V8ccKGumz2OoyQAAbAwnHQ (envelope-from ) for ; Tue, 24 Jan 2023 10:35:39 +0100 Received: from aspmx1.migadu.com ([2001:41d0:2:4a6f::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by mp11.migadu.com with LMTPS id qL4/J2umz2MNCwAA9RJhRA (envelope-from ) for ; Tue, 24 Jan 2023 10:35:39 +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 5A2EA12BB5 for ; Tue, 24 Jan 2023 10:35:39 +0100 (CET) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pKFhW-0003BY-TR; Tue, 24 Jan 2023 04:34:48 -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 1pKFhQ-0003B7-HE for emacs-orgmode@gnu.org; Tue, 24 Jan 2023 04:34:41 -0500 Received: from mout01.posteo.de ([185.67.36.65]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pKFhH-0001WF-7e for emacs-orgmode@gnu.org; Tue, 24 Jan 2023 04:34:34 -0500 Received: from submission (posteo.de [185.67.36.169]) by mout01.posteo.de (Postfix) with ESMTPS id 4DD8424036F for ; Tue, 24 Jan 2023 10:34:26 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.net; s=2017; t=1674552866; bh=jqw8La1Gun7qmY6d78EamyLa/ZN5dq2tkPpsZ7yUdd8=; h=From:To:Cc:Subject:Date:From; b=rC1e0XskRex3rQu0atgToLax3W9pZqozmJUjZPYW1SXX7aaY/it5HGFlTdda1KCAf WjwfVVgKy9wBpwx71glc9QwBVBmmKxU153bgB9Ib6hWWC7JB91rZEqFxXqUuHLCEYP 8JSogvgdVNrspqdePZpVmM2VvBO/xyqmJ6y7L6dTbqIi2J0wU+Im80b72Xsl7YVsXz KMRaIVOiMsXQ/d9h/pcqlcvKSegLue6m61I7PUx32a5vjlAHJspsQAhMsQo41j1Lp9 W/wUzHRYhqzeboXbtuRHrdxXeUcJW5Lfn2kKHr6oSi/uX4r4JQ/rfOu92QWYshENxN frDLb3KC4fZ7Q== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4P1MHf5YBVz9rxH; Tue, 24 Jan 2023 10:34:22 +0100 (CET) From: Ihor Radchenko To: "Thomas S. Dye" Cc: Jean Louis , Max Nikulin , emacs-orgmode@gnu.org Subject: Re: UTC or not UTC for timestamps in the past ([FEATURE REQUEST] Timezone support in org-mode) In-Reply-To: <87edrli4sr.fsf@tsdye.online> References: <87lelxk87a.fsf@tsdye.online> <63ca5101.630a0220.b2298.3363@mx.google.com> <63cb2d0b.630a0220.f919a.6174@mx.google.com> <63cc5983.620a0220.a7d40.68f6@mx.google.com> <87r0vnhxj6.fsf@tsdye.online> <87ilgyiid8.fsf@tsdye.online> <87edrli4sr.fsf@tsdye.online> Date: Tue, 24 Jan 2023 09:34:50 +0000 Message-ID: <87v8kw5l8l.fsf@localhost> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Received-SPF: pass client-ip=185.67.36.65; envelope-from=yantar92@posteo.net; helo=mout01.posteo.de X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 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, RCVD_IN_DNSWL_MED=-2.3, 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." 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Dye" writes: >> I understand above that it is easier understandable when reading >> [2023-01-22 Sun 08:29@+1100] as it is assumed by poster (I guess=20 >> Max) >> that user will understand that there is +11 hours ahead. >> > Yes, the offset here is ambiguous--is it offset from some timezone=20 > or from UTC? It is not ambiguous if the user is familiar with standard time format. The representation above is derived from https://en.wikipedia.org/wiki/ISO_8601, which allows the following: