From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Paul Eggert Newsgroups: gmane.emacs.devel Subject: Re: [Emacs-diffs] master 085c7f6 2/2: Test format-time-string with zone arg Date: Sun, 30 Apr 2017 13:49:53 -0700 Organization: UCLA Computer Science Department Message-ID: <269c5353-d07b-5cf0-4009-3d817351c470@cs.ucla.edu> References: <20170427222412.28742.14016@vcs0.savannah.gnu.org> <20170427222413.8FBA722040@vcs0.savannah.gnu.org> <07e00044-4ce1-bba8-2fe5-4e7eb7fb27a6@cornell.edu> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Trace: blaine.gmane.org 1493585442 15826 195.159.176.226 (30 Apr 2017 20:50:42 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sun, 30 Apr 2017 20:50:42 +0000 (UTC) User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 To: Ken Brown , emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sun Apr 30 22:50:38 2017 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1d4vni-00040t-EZ for ged-emacs-devel@m.gmane.org; Sun, 30 Apr 2017 22:50:38 +0200 Original-Received: from localhost ([::1]:45876 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d4vno-00033R-9O for ged-emacs-devel@m.gmane.org; Sun, 30 Apr 2017 16:50:44 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:38164) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d4vnA-000335-DO for emacs-devel@gnu.org; Sun, 30 Apr 2017 16:50:05 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1d4vn6-0004AA-Gz for emacs-devel@gnu.org; Sun, 30 Apr 2017 16:50:04 -0400 Original-Received: from zimbra.cs.ucla.edu ([131.179.128.68]:43242) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1d4vn6-0004A2-AE for emacs-devel@gnu.org; Sun, 30 Apr 2017 16:50:00 -0400 Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 054E0160064; Sun, 30 Apr 2017 13:49:58 -0700 (PDT) Original-Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id xb7qy6py-NyW; Sun, 30 Apr 2017 13:49:57 -0700 (PDT) Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 46AF916006B; Sun, 30 Apr 2017 13:49:57 -0700 (PDT) X-Virus-Scanned: amavisd-new at zimbra.cs.ucla.edu Original-Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id z_bXlmwK_t9I; Sun, 30 Apr 2017 13:49:57 -0700 (PDT) Original-Received: from [192.168.1.9] (unknown [47.153.188.248]) by zimbra.cs.ucla.edu (Postfix) with ESMTPSA id 2BC10160064; Sun, 30 Apr 2017 13:49:57 -0700 (PDT) In-Reply-To: <07e00044-4ce1-bba8-2fe5-4e7eb7fb27a6@cornell.edu> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [fuzzy] X-Received-From: 131.179.128.68 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:214454 Archived-At: Ken Brown wrote: > This test fails on Cygwin. > > (format-time-string "%Y-%m-%d %H:%M:%S %z (%Z)" '(0 0 0 0) > "NZST-12NZDT,M9.5.0,M4.1.0/3") > > evaluates to "1970-01-01 12:00:00 +1200 (NZST)". Can you give me some guidance > as to how to track this down? I know nothing about how time zones work. What does this shell command do? TZ='NZST-12NZDT,M9.5.0,M4.1.0/3' date -d@0 +'%Y-%m-%d %H:%M:%S %z (%Z)' On a working system with GNU 'date', it should output this: 1970-01-01 13:00:00 +1300 (NZDT) If it outputs "1970-01-01 12:00:00 +1200 (NZST)" on Cygwin, it's a bug in Cygwin not in Emacs per se. If so, perhaps we should just skip the test on Cygwin (you might file a Cygwin bug report). If not, I'll have some other questions to ask.