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From: Nicolas Goaziou <mail@nicolasgoaziou.fr>
To: Allen Li <vianchielfaura@gmail.com>
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: Thu, 02 Nov 2017 10:35:58 +0100	[thread overview]
Message-ID: <87inetm39d.fsf@nicolasgoaziou.fr> (raw)
In-Reply-To: <CAJr1M6fRVKF4_0JdZC0curBJfiQEq=jXNY1TzVgJXqBVPUJEJA@mail.gmail.com> (Allen Li's message of "Wed, 1 Nov 2017 17:10:21 -0700")

Hello,

Allen Li <vianchielfaura@gmail.com> writes:

> 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.

You're right. Using UTC doesn't solve any DST bug, despite what
I initially thought. I think we just need to remove the whole set of
changes about UTC in `parse-time-string'. We also need to adapt tests in
test-org-clock since the same time difference could have different
meanings depending on the time zone. I can do that later, if no one
objects. WDYT?n

Refactoring time functions in Org is still useful, though.

Regards,

-- 
Nicolas Goaziou

  reply	other threads:[~2017-11-02  9:36 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
2017-11-02  9:35               ` Nicolas Goaziou [this message]
2017-11-02 11:12                 ` Tim Cross

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