GNU bug report logs - #41106
date --date '20180325 02:58:00' fails

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Julien Demaria <julien.demaria <at> acri-st.fr>
To: "bug-coreutils <at> gnu.org" <bug-coreutils <at> gnu.org>
Subject: RE:date --date '20180325 02:58:00' fails
Date: Wed, 6 May 2020 08:04:41 +0000

Sorry I just found the reason in the FAQ... :-(
https://www.gnu.org/software/coreutils/faq/coreutils-faq.html#The-date-command-is-not-working-right_002e
I am in local daylight saving time change case.

Thanks

________________________________________
De : Julien Demaria
Envoyé : mercredi 6 mai 2020 09:59
À : bug-coreutils <at> gnu.org
Objet : date --date '20180325 02:58:00' fails

Hi,

We found this very suspect behavior:

$ date --date '20180325 02:58:00'
date: invalid date `20180325 02:58:00'

but for the previous day it works...:

$ date --date '20180323 02:58:00'
Fri Mar 23 02:58:00 CET 2018

Is it a bug?

Adding -u or setting TZ seems a workaround.

Tested with version 8.28 on Ubuntu 18.04.4 LTS
and also with version 8.13 on Debian GNU/Linux 7

Thanks in advance,
Julien

Message #8 received at 41106 <at> debbugs.gnu.org (full text, mbox):

From: taehwan jeoung <taehwanjeoung <at> yahoo.com>
To: 41106 <at> debbugs.gnu.org, Julien Demaria <julien.demaria <at> acri-st.fr>
Subject: Re: bug#41106: date --date '20180325 02:58:00' fails
Date: Wed, 6 May 2020 12:59:23 +0000 (UTC)

[Message part 1 (text/plain, inline)]

 That's showing up your bright stupidity but you future is still bright! keep working on that~! lol... just joke added~ :)
    2020년 5월 6일 수요일 오후 05시 47분 51초 GMT+9, Julien Demaria <julien.demaria <at> acri-st.fr> 작성:  
 
 Sorry I just found the reason in the FAQ... :-(
https://www.gnu.org/software/coreutils/faq/coreutils-faq.html#The-date-command-is-not-working-right_002e
I am in local daylight saving time change case.

Thanks

________________________________________
De : Julien Demaria
Envoyé : mercredi 6 mai 2020 09:59
À : bug-coreutils <at> gnu.org
Objet : date --date '20180325 02:58:00' fails

Hi,

We found this very suspect behavior:

$ date --date '20180325 02:58:00'
date: invalid date `20180325 02:58:00'

but for the previous day it works...:

$ date --date '20180323 02:58:00'
Fri Mar 23 02:58:00 CET 2018

Is it a bug?

Adding -u or setting TZ seems a workaround.

Tested with version 8.28 on Ubuntu 18.04.4 LTS
and also with version 8.13 on Debian GNU/Linux 7

Thanks in advance,
Julien


  

[Message part 2 (text/html, inline)]

Message #13 received at 41106-done <at> debbugs.gnu.org (full text, mbox):

From: Bernhard Voelker <mail <at> bernhard-voelker.de>
To: Julien Demaria <julien.demaria <at> acri-st.fr>, 41106-done <at> debbugs.gnu.org
Subject: Re: bug#41106: date --date '20180325 02:58:00' fails
Date: Wed, 6 May 2020 17:41:16 +0200

tag 41106 notabug
thanks

On 2020-05-06 10:04, Julien Demaria wrote:
>> $ date --date '20180325 02:58:00'
>> date: invalid date `20180325 02:58:00'

> Sorry I just found the reason in the FAQ... :-(
> https://www.gnu.org/software/coreutils/faq/coreutils-faq.html#The-date-command-is-not-working-right_002e
> I am in local daylight saving time change case.

Indeed, the debug option shows it:

date --debug --date '20180325 02:58:00'
date: parsed number part: (Y-M-D) 2018-03-25
date: parsed time part: 02:58:00
date: input timezone: system default
date: using specified time as starting value: '02:58:00'
date: error: invalid date/time value:
date:     user provided time: '(Y-M-D) 2018-03-25 02:58:00'
date:        normalized time: '(Y-M-D) 2018-03-25 03:58:00'
date:                                             --
date:      possible reasons:
date:        non-existing due to daylight-saving time;
date:        numeric values overflow;
date:        missing timezone
date: invalid date '20180325 02:58:00'

As such, I'm marking this issue as 'notabug' in our bug tracker.

Have a nice day,
Berny

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