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bug#6897: date -d '1991-04-14 +1 day' fails
From: |
Voelker, Bernhard |
Subject: |
bug#6897: date -d '1991-04-14 +1 day' fails |
Date: |
Tue, 24 Aug 2010 09:23:15 +0200 |
On 08/23/2010 18:02, Payk Eggert wrote:
> ... For example:
> $ TZ=Pacific/Kwajalein date -d 1993-08-20
> date: invalid date `1993-08-20'
> There was no time during the day 1993-08-20, because at midnight Kwajalein
> moved the clocks ahead by 24 hours.
BTW: This example looks different here:
$ TZ=Pacific/Kwajalein date -d 1993-08-20
Sat Aug 21 00:00:00 MHT 1993
$ date --version
date (GNU coreutils) 8.5
Packaged by Cygwin (8.5-2)
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Written by David MacKenzie.
Why?
> Aren't dates fun?
Well, imagine such [an ugly but easy] loop thru all days of a year:
d='1993-01-01'
while [ "${d%%-*}" = "1993" ]
do
echo $d # loop body
d=$( date -d "$d + 1 day" '+%Y-%m-%d' ) # step to next day
done
Given that there's no valid time like 12:00 with TZ="Pacific/Kwajalein" for Aug
20th,
do you think this loop should really fail?
With a normal user's perspective, I'd expect `date` to "just do the job"
and find the next day after 1993-08-19 ...
Have a nice day,
Berny
- bug#6897: date -d '1991-04-14 +1 day' fails, 李嘉鹏, 2010/08/22
- bug#6897: date -d '1991-04-14 +1 day' fails, Bob Proulx, 2010/08/22
- bug#6897: date -d '1991-04-14 +1 day' fails, Alan Curry, 2010/08/22
- bug#6897: date -d '1991-04-14 +1 day' fails,
Voelker, Bernhard <=
- bug#6897: date -d '1991-04-14 +1 day' fails, Paul Eggert, 2010/08/24
- bug#6897: date -d '1991-04-14 +1 day' fails, Voelker, Bernhard, 2010/08/24
- bug#6897: date -d '1991-04-14 +1 day' fails, Bob Proulx, 2010/08/24
- bug#6897: date -d '1991-04-14 +1 day' fails, Eric Blake, 2010/08/24
- bug#6897: date -d '1991-04-14 +1 day' fails, Voelker, Bernhard, 2010/08/24
bug#6897: date -d '1991-04-14 +1 day' fails, Bob Proulx, 2010/08/23