GNU bug report logs - #53982
date (GNU coreutils) 8.30 bug report "17 april 2022 + 37 week 5pm"

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

From: Stéphane Archer <archerstephane <at> gmail.com>
To: bug-coreutils <at> gnu.org
Subject: date (GNU coreutils) 8.30 bug report "17 april 2022 + 37 week 5pm"
Date: Sun, 13 Feb 2022 21:18:55 +0100

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

Hi,
I hope this is the right place to do my bug report.
please see the following shell input-output:
```
$ date -d "17 april 2022 + 36 week 5pm" +'%G-%m-%dT%H:%M:%S.0Z'
2022-12-25T17:00:00.0Z
$ date -d "17 april 2022 + 37 week 5pm" +'%G-%m-%dT%H:%M:%S.0Z'
2022-01-01T17:00:00.0Z
$ date -d "17 april 2022 + 38 week 5pm" +'%G-%m-%dT%H:%M:%S.0Z'
2023-01-08T17:00:00.0Z
```
as you can see the input "17 april 2022 + 37 week 5pm" makes date return
the wrong output for some unknown reason.

Do I do something wrong?
I use the following version: date (GNU coreutils) 8.30

-- 
Best Regards,

Stephane Archer

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

Message #8 received at 53982 <at> debbugs.gnu.org (full text, mbox):

From: Andreas Schwab <schwab <at> linux-m68k.org>
To: Stéphane Archer <archerstephane <at> gmail.com>
Cc: 53982 <at> debbugs.gnu.org
Subject: Re: bug#53982: date (GNU coreutils) 8.30 bug report "17 april 2022
 + 37 week 5pm"
Date: Mon, 14 Feb 2022 09:17:51 +0100

On Feb 13 2022, Stéphane Archer wrote:

> $ date -d "17 april 2022 + 36 week 5pm" +'%G-%m-%dT%H:%M:%S.0Z'
> 2022-12-25T17:00:00.0Z
> $ date -d "17 april 2022 + 37 week 5pm" +'%G-%m-%dT%H:%M:%S.0Z'
> 2022-01-01T17:00:00.0Z
> $ date -d "17 april 2022 + 38 week 5pm" +'%G-%m-%dT%H:%M:%S.0Z'
> 2023-01-08T17:00:00.0Z
> ```
> as you can see the input "17 april 2022 + 37 week 5pm" makes date return
> the wrong output for some unknown reason.

It doesn't make sense to use %G without %V, or to use it in place of %Y.

$ date -d "17 april 2022 + 37 week 5pm" +'%G/%V %Y-%m-%dT%H:%M:%S.0Z'
2022/52 2023-01-01T17:00:00.0Z

-- 
Andreas Schwab, schwab <at> linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510  2552 DF73 E780 A9DA AEC1
"And now for something completely different."

Message #11 received at 53982 <at> debbugs.gnu.org (full text, mbox):

From: Stéphane Archer <archerstephane <at> gmail.com>
To: Andreas Schwab <schwab <at> linux-m68k.org>
Cc: 53982 <at> debbugs.gnu.org
Subject: Re: bug#53982: date (GNU coreutils) 8.30 bug report "17 april 2022 +
 37 week 5pm"
Date: Mon, 14 Feb 2022 10:41:45 +0100

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

Hi Andreas,

thank you for your help, I didn't realize I was using the wrong format for
what I wanted.
I don't have much experience with the project.
The format I wanted was: YYYY-MM-DDThh:mm:ss.sZ
is +'%Y-%m-%dT%H:%M:%S.0Z' do what I want or are there still some mistakes
there?

Thank you again and sorry for the bug report, it was late and I was sure to
have found a bug ^^"

Best regards

Stéphane Archer


On Mon, Feb 14, 2022 at 9:17 AM Andreas Schwab <schwab <at> linux-m68k.org>
wrote:

> On Feb 13 2022, Stéphane Archer wrote:
>
> > $ date -d "17 april 2022 + 36 week 5pm" +'%G-%m-%dT%H:%M:%S.0Z'
> > 2022-12-25T17:00:00.0Z
> > $ date -d "17 april 2022 + 37 week 5pm" +'%G-%m-%dT%H:%M:%S.0Z'
> > 2022-01-01T17:00:00.0Z
> > $ date -d "17 april 2022 + 38 week 5pm" +'%G-%m-%dT%H:%M:%S.0Z'
> > 2023-01-08T17:00:00.0Z
> > ```
> > as you can see the input "17 april 2022 + 37 week 5pm" makes date return
> > the wrong output for some unknown reason.
>
> It doesn't make sense to use %G without %V, or to use it in place of %Y.
>
> $ date -d "17 april 2022 + 37 week 5pm" +'%G/%V %Y-%m-%dT%H:%M:%S.0Z'
> 2022/52 2023-01-01T17:00:00.0Z
>
> --
> Andreas Schwab, schwab <at> linux-m68k.org
> GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510  2552 DF73 E780 A9DA AEC1
> "And now for something completely different."
>


-- 
Best Regards,

Stephane Archer

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

Message #16 received at 53982-done <at> debbugs.gnu.org (full text, mbox):

From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Stéphane Archer <archerstephane <at> gmail.com>
Cc: 53982-done <at> debbugs.gnu.org
Subject: Re: bug#53982: date (GNU coreutils) 8.30 bug report "17 april 2022 +
 37 week 5pm"
Date: Mon, 14 Feb 2022 11:02:27 -0800

On 2/14/22 01:41, Stéphane Archer wrote:
> is +'%Y-%m-%dT%H:%M:%S.0Z' do what I want

To format an arbitrary timestamp you want "+%Y-%m-%dT%H:%M:%S.%1NZ", 
unless you always want a zero after the period.

Closing the bug report as there's no bug here.

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