From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mp10.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 OO9XIW/fwmMUcwEAbAwnHQ (envelope-from ) for ; Sat, 14 Jan 2023 17:59:27 +0100 Received: from aspmx1.migadu.com ([2001:41d0:2:4a6f::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by mp10.migadu.com with LMTPS id 4NJyIG/fwmOzLgAAG6o9tA (envelope-from ) for ; Sat, 14 Jan 2023 17:59:27 +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 134632EA35 for ; Sat, 14 Jan 2023 17:59:27 +0100 (CET) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pGjrh-00030U-9g; Sat, 14 Jan 2023 11:58:45 -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 1pGjrd-00030I-Sf for emacs-orgmode@gnu.org; Sat, 14 Jan 2023 11:58:41 -0500 Received: from ciao.gmane.io ([116.202.254.214]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pGjrb-0004lo-Ey for emacs-orgmode@gnu.org; Sat, 14 Jan 2023 11:58:41 -0500 Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1pGjra-0003cG-6q for emacs-orgmode@gnu.org; Sat, 14 Jan 2023 17:58:38 +0100 X-Injected-Via-Gmane: http://gmane.org/ To: emacs-orgmode@gnu.org From: Max Nikulin Subject: Re: [FEATURE REQUEST] Timezone support in org-mode datestamps and org-agenda Date: Sat, 14 Jan 2023 23:58:33 +0700 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.4.2 Content-Language: en-US In-Reply-To: Received-SPF: pass client-ip=116.202.254.214; envelope-from=geo-emacs-orgmode@m.gmane-mx.org; helo=ciao.gmane.io X-Spam_score_int: 26 X-Spam_score: 2.6 X-Spam_bar: ++ X-Spam_report: (2.6 / 5.0 requ) BAYES_00=-1.9, DKIM_ADSP_CUSTOM_MED=0.001, FORGED_GMAIL_RCVD=1, FORGED_MUA_MOZILLA=2.309, FREEMAIL_FORGED_FROMDOMAIN=0.001, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.25, NICE_REPLY_A=-0.001, 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: 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=1673715567; a=rsa-sha256; cv=none; b=SOKMmU63lC3dklxpRa+fGePRnkPLFXIdtAxlgh5Sra8nnhZDqjhUZsWdtKffDN7JE8dLSv TgSQ1J0g7xyO+bECVVKRVd+RFoaVfHynlOmxWgQ4vHHvH/7o0kQHgrD2kDrPv6F1Sp4/ok EoWZU7l9rOVHc9TQzF2ltVs+fBLPnLeRhXQrj8CQ7W0Fb9AcrpYYzTvjmlSu+O0BdlBg9s jOe14qb9XFJ62U81oNIjY2HcnXB4Vlb/EIaaT6kakGqSU42JltF1VZutMzP71zpB2pxQ5e tB4aj+FSZt/UwMry9QFPEdR4A8MMbZ4Vg8i4lRqy783A81O3xEYsdTKmGx5sgg== 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=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=gmail.com (policy=none) ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=yhetil.org; s=key1; t=1673715567; 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; bh=v9ZH6FrYo9e2buNnBcgMkDPw6lyUt7LLArFEdein1Hk=; b=pEK5uY3S8/f3hcYPnjg3W4uy1aNQlRNhNjsRQQ4mFVHGaTwtOMx01cZ7oeSihMw09dv7KB gjVq7C/65JzUwZKytwQCCnIHLD+GapJ2iERqh24PUz9oNa+QwUBeL72XX7Ddwqj9X4Wkgt Rkxv93VQ6WJSYEDnNlomVkqiMSfyiOfs2ESgGqe161EBepBBnYhf1Ii2QxxozvUCRkBph0 Cg9OwTZEz8pccYFlpO3qnv2RvLjcC9y0Pk87zjvqcDmpgHjj7mGJxXy/2A5kaIbVcO6LDz NbSSuXnM+8r0f4xCYpEPvLeGEY3hmB5hr8keLbLHqZX3YzZN07C2l0eiZyrIzA== X-Migadu-Spam-Score: -2.31 X-Spam-Score: -2.31 X-Migadu-Queue-Id: 134632EA35 X-Migadu-Scanner: scn1.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=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=gmail.com (policy=none) X-TUID: P8DWOlwDRIqh On 14/01/2023 20:08, Jean Louis wrote: > * Max Nikulin [2023-01-14 10:14]: >> Let's assume <2023-01-15 Sun 09:00 +1> >> >> It may be suitable for timestamps in the past, but future is more tricky. >> There is no problem if you are going to watch Lunar eclipse. However if your >> plan is to attend a local event there is a chance that you will arrive at >> wrong time. Sometimes offset of timezones is changed and it may happen >> between the moment when you added a scheduled time and the moment of the >> event. > > Can't follow you. > > with "+1" I would say it is time zone. > > Basic point is that users shall learn to express themselves by using > time zone. "+1" is not a timezone, it is current offset shared by several timezones. You can not assure that time offset at a particular location would not change due to new administrative rules. E.g. Europe/Berlin is a timezone, but, strictly speaking, is still underspecified. Sometimes timezones are split into smaller parts.