From: Allen Li <vianchielfaura@gmail.com>
To: Nicolas Goaziou <mail@nicolasgoaziou.fr>
Cc: emacs-orgmode@gnu.org
Subject: Re: Bug: org-2ft and/or float-time is wrong [9.1.2 (9.1.2-22-ga2a034-elpaplus @ ~/.emacs.d/elpa/org-plus-contrib-20171023/)]
Date: Wed, 1 Nov 2017 17:10:21 -0700 [thread overview]
Message-ID: <CAJr1M6fRVKF4_0JdZC0curBJfiQEq=jXNY1TzVgJXqBVPUJEJA@mail.gmail.com> (raw)
In-Reply-To: <87bmkl1zy9.fsf@nicolasgoaziou.fr>
On Wed, Nov 1, 2017 at 1:55 PM, Nicolas Goaziou <mail@nicolasgoaziou.fr> wrote:
>
> IIRC, the point is to remove DST in durations, i.e., in the difference
> between two dates. One way to do that is to assume UTC in both start end
> end date. Most of the commits are about making sure UTC is used whenever
> two Org dates are to be used in a duration computation, and nowhere
> else.
Alas, I still can't seem to find the original DST bug. I'm not sure
using UTC solves DST problems.
For example, in the timezone America/Los_Angeles,
<2017-11-05 01:00:00> -> <2017-11-05 04:00:00> = 4 hours
<2017-10-10 01:00:00> -> <2017-10-10 04:00:00> = 3 hours
<2017-03-12 01:00:00> -> <2017-03-12 04:00:00> = 2 hour
This is what Emacs gives me using the default time zone
<2017-11-05 01:00:00> -> <2017-11-05 04:00:00> = 4 hours
<2017-10-10 01:00:00> -> <2017-10-10 04:00:00> = 3 hours
<2017-03-12 01:00:00> -> <2017-03-12 04:00:00> = 2 hour
This is what Emacs gives me using UTC
<2017-11-05 01:00:00> -> <2017-11-05 04:00:00> = 3 hours
<2017-10-10 01:00:00> -> <2017-10-10 04:00:00> = 3 hours
<2017-03-12 01:00:00> -> <2017-03-12 04:00:00> = 3 hours
Using UTC seems strictly wrong to me.
>
> I think the change to org-2ft was a side-effect, since it is indirectly
> used is a duration.
>
> Regards,
>
> --
> Nicolas Goaziou 0x80A93738
next prev parent reply other threads:[~2017-11-02 0:10 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-31 0:40 Bug: org-2ft and/or float-time is wrong [9.1.2 (9.1.2-22-ga2a034-elpaplus @ ~/.emacs.d/elpa/org-plus-contrib-20171023/)] Allen Li
2017-10-31 4:33 ` Allen Li
2017-10-31 18:23 ` Nicolas Goaziou
2017-10-31 18:35 ` Allen Li
2017-10-31 18:52 ` Nicolas Goaziou
2017-11-01 5:07 ` Allen Li
2017-11-01 5:41 ` Tim Cross
2017-11-01 6:26 ` Allen Li
2017-11-01 7:18 ` Tim Cross
2017-11-01 8:28 ` Allen Li
2017-11-01 13:09 ` Tim Cross
2017-11-01 19:14 ` Allen Li
2017-11-01 19:21 ` Allen Li
2017-11-02 0:09 ` Tim Cross
2017-11-02 0:26 ` Allen Li
2017-11-02 3:27 ` Tim Cross
2017-11-02 4:05 ` Allen Li
2017-11-02 4:28 ` Allen Li
2017-11-02 4:49 ` Allen Li
2017-11-02 4:56 ` Tim Cross
2017-11-02 5:12 ` Allen Li
2017-11-02 16:19 ` Nick Dokos
2017-11-02 19:56 ` Tim Cross
2017-11-01 20:55 ` Nicolas Goaziou
2017-11-02 0:10 ` Allen Li [this message]
2017-11-02 9:35 ` Nicolas Goaziou
2017-11-02 11:12 ` Tim Cross
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