[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
bug#23664: Date Problem: Wrong return using last month today (2016-05-31
From: |
Eric Blake |
Subject: |
bug#23664: Date Problem: Wrong return using last month today (2016-05-31) |
Date: |
Tue, 31 May 2016 13:32:04 -0600 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 |
tag 23664 notabug
thanks
On 05/31/2016 12:14 PM, Felippe Silvestre wrote:
> address@hidden ~]# date
>
> Tue May 31 15:10:47 BRT 2016
>
>
>
> address@hidden ~]# date -d"last month"
>
> Sun May 1 15:10:52 BRT 2016
You've hit a FAQ; relative date terms like "last month" are easier to
code if they merely add a fixed amount of 30 days, rather than a
variable logical amount, particularly since the amount that would be
variable may depend on things like daylight savings changes.
https://www.gnu.org/software/coreutils/faq/coreutils-faq.html#The-date-command-is-not-working-right_002e
There is work underway to add a 'date --debug' option that will make it
more obvious HOW date is arriving at its results when presented with
inherently ambiguous requests, such as using "last month" near the
boundary of a month.
I'm closing out this particular request in the bug database, since it is
known behavior, but feel free to add more comments or even provide a
reason that it should be reopened if what has been mentioned above is
insufficient to help you with your use of 'date'.
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
signature.asc
Description: OpenPGP digital signature