From mboxrd@z Thu Jan 1 00:00:00 1970 From: Russell Adams Subject: Re: Time-zone in dates Date: Tue, 7 Jul 2015 12:27:07 -0500 Message-ID: <20150707172707.GK3703@cardamom.adamsinfoserv.com> References: <87ioaav72g.fsf@ucl.ac.uk> <87y4j6tgyn.fsf@nicolasgoaziou.fr> <20150626195749.GG5090@fjo-extia-HPdeb> <87zj3iodr4.fsf@ucl.ac.uk> <87egkugfjw.fsf@pierrot.dokosmarshall.org> <878ub1zlzy.fsf@delle7240.chemeng.ucl.ac.uk> <87lhf1i68s.fsf@alphaville.usersys.redhat.com> <87fv581jfv.fsf@ucl.ac.uk> <874mlo9l6k.fsf@ucl.ac.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from eggs.gnu.org ([2001:4830:134:3::10]:33251) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZCWeH-0002jd-BU for emacs-orgmode@gnu.org; Tue, 07 Jul 2015 13:27:14 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZCWeE-0006IW-Lv for emacs-orgmode@gnu.org; Tue, 07 Jul 2015 13:27:13 -0400 Received: from kefka.asoshared.com ([65.99.237.198]:25568) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZCWeE-0006IA-HA for emacs-orgmode@gnu.org; Tue, 07 Jul 2015 13:27:10 -0400 Content-Disposition: inline In-Reply-To: <874mlo9l6k.fsf@ucl.ac.uk> List-Id: "General discussions about Org-mode." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org Sender: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org To: emacs-orgmode@gnu.org Cc: Michael Brand On Wed, Jul 01, 2015 at 12:22:43PM +0100, Eric S Fraga wrote: > Michael, > > thanks for some brilliant use cases! > > I particularly like the single event (a flight) that requires more than > one time zone to make sense. My diary is chock full of cases where it > looks like a flight out somewhere takes 2 hours but coming back takes > 11! (strong winds ;-) > > -- > : Eric S Fraga (0xFFFCF67D), Emacs 25.0.50.1, Org release_8.3beta-1260-gcedef7 > I believe this doesn't disprove the need for storing in UTC. I just think it means that you need a display filter that can specify a timezone. It sounds like most of your times will be correct using your system time, and if you have something that needs to be displayed in a different timezone, specify it for that one entry. After all there's no data lost in the plane example other than the relative timezone of the observer. The duration is fixed, and the UTC times are exact. Only the observer changes timezone. ------------------------------------------------------------------ Russell Adams RLAdams@AdamsInfoServ.com PGP Key ID: 0x1160DCB3 http://www.adamsinfoserv.com/ Fingerprint: 1723 D8CA 4280 1EC9 557F 66E8 1154 E018 1160 DCB3