From: Yuri Khan <yuri.v.khan@gmail.com>
To: Michael Heerdegen <michael_heerdegen@web.de>
Cc: Emacs mailing list <help-gnu-emacs@gnu.org>
Subject: Re: Time zone trouble without time zones being involved
Date: Sun, 3 Apr 2016 12:43:40 +0600 [thread overview]
Message-ID: <CAP_d_8X-YUgS0BCE1o=JxxK4CX-H50f71LLF9X8FH6zx8+vtKA@mail.gmail.com> (raw)
In-Reply-To: <87shz3cjbo.fsf@web.de>
On Sun, Apr 3, 2016 at 12:11 PM, Michael Heerdegen
<michael_heerdegen@web.de> wrote:
> I'm using git to make a backup of the file I'm working with after every
> save. I want to display the age of the last backup made in the
> mode-line.
[…snipped…]
Your method looks sane to me, although the mention of TZ and mktime
regarding %s bother me a bit.
> The problem: since we have Daylight saving time, this always shows one
> hour less than the expected value (directly after saving it shows
> -0:59h). This makes no sense to me, since I only work with "seconds
> since Epoch" absolute time values that I thought would not depend on the
> local time zone. So either git or Emacs seems to make an error.
Let’s determine which.
1. Mark the current UTC time, both as a human-readable string and as a
unixtime value (e.g. on GNU, “date --utc --rfc-3339=seconds” and “date
+%s”, respectively).
2. Make a commit.
3. Execute the same command, “git log --pretty=format:%ad --date=format:%s -n1”.
4. Evaluate (current-time) and convert the first two elements of the
resulting 4-element list to unixtime.
5. Check that the three unixtime values from steps 1, 3 and 4 are
reasonably close.
6. By the way, which OS are you on?
next prev parent reply other threads:[~2016-04-03 6:43 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-03 6:11 Time zone trouble without time zones being involved Michael Heerdegen
2016-04-03 6:43 ` Yuri Khan [this message]
2016-04-13 16:14 ` Michael Heerdegen
2016-04-13 16:48 ` Yuri Khan
2016-04-13 17:16 ` Michael Heerdegen
2016-04-13 17:40 ` Yuri Khan
2016-05-14 18:53 ` Michael Heerdegen
2016-05-14 21:51 ` Yuri Khan
2016-05-16 15:47 ` Michael Heerdegen
2016-05-16 16:06 ` Yuri Khan
2016-05-17 14:57 ` Michael Heerdegen
2016-05-17 15:31 ` Yuri Khan
2016-05-17 16:19 ` Michael Heerdegen
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='CAP_d_8X-YUgS0BCE1o=JxxK4CX-H50f71LLF9X8FH6zx8+vtKA@mail.gmail.com' \
--to=yuri.v.khan@gmail.com \
--cc=help-gnu-emacs@gnu.org \
--cc=michael_heerdegen@web.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this external index
https://git.savannah.gnu.org/cgit/emacs.git
https://git.savannah.gnu.org/cgit/emacs/org-mode.git
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.