Subject: bug#57834: Date Command Anomaly

From: Chris Elvidge <[email-masked]>
Date: Fri, 23 Sep 2022 18:04:54 +0100

On 23/09/2022 14:03, Bert Wesarg via GNU coreutils Bug Reports wrote:
> Dear,
> 
> $ TZ=Europe/London date --debug --date="2022/03/27 01:00:00"
> date: warning: value 2022 has 4 digits. Assuming YYYY/MM/DD
> date: parsed date part: (Y-M-D) 2022-03-27
> date: parsed time part: 01:00:00
> date: input timezone: TZ="Europe/London" environment value
> date: using specified time as starting value: '01:00:00'
> date: error: invalid date/time value:
> date:     user provided time: '(Y-M-D) 2022-03-27 01:00:00'
> date:        normalized time: '(Y-M-D) 2022-03-27 02:00:00'
> date:                                             --
> date:      possible reasons:
> date:        non-existing due to daylight-saving time;
> date:        numeric values overflow;
> date:        missing timezone
> date: invalid date ‘2022/03/27 01:00:00’
> 
> Best
> Bert
> 
> On Thu, Sep 15, 2022 at 5:21 PM Martin Hughes via GNU coreutils Bug
> Reports <[email-masked]> wrote:
>>
>>
>> Dear Sir,
>> I have stumbled across this anomaly whilst processing a series of dates.
>> I have not found any other legal date combination that generates this
>> error. Perl time facilities seem to be affected by this too.
>>
>> mjh@carnaby:~> date --date="2022/03/27 00:00:00"
>> Sun 27 Mar 00:00:00 GMT 2022
>>
>> mjh@carnaby:~> date --date="2022/03/27 01:00:00"
>> date: invalid date ‘2022/03/27 01:00:00’
>>
>> mjh@carnaby:~> date --date="2022/03/27 02:00:00"
>> Sun 27 Mar 02:00:00 BST 2022
>>
>> The version of date is:
>> mjh@carnaby:~> date --version
>> date (GNU coreutils) 8.29
>> Copyright (C) 2017 Free Software Foundation, Inc.
>> License GPLv3+: GNU GPL version 3 or later
>> <https://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.
>>
>> The operating system is opensuse leap 15.2:
>> Linux version 5.3.18-lp152.106-default (geeko@buildhost) (gcc version
>> 7.5.0 (SUSE Linux)) #1 SMP Mon Nov 22 08:38:17 UTC 2021 (52078fe)
>>
>> Martin Hughes
> 
> 
> 
> 

A bit late to the party weren't you?
Martin acknowledged it was GMT/BST transition, on 15th September.

-- 

Chris Elvidge