I see, so the issue is whether "1 day" is defined as 24 hours or the same
hour/minute/second on the previous day.
And this would apply to things on the front end of the season like
$ date -d "2001-04-01 -1 day"
Sat Mar 31 00:00:00 PST 2001
$ date -d "2001-04-02 -2 day"
Fri Mar 30 23:00:00 PST 2001
as well. My workaround since I don't need the hours (just the year, month, day)
might be to set the time to noon instead of midnight.
$ date -d "12:00:00 2001-04-01 -1 day"
Sat Mar 31 11:00:00 PST 2001
$ date -d "12:00:00 2001-04-02 -2 day"
Sat Mar 31 11:00:00 PST 2001
Good info, lightning response, thanks.
Tom
-----Original Message-----
From: Eric Blake [mailto:[EMAIL PROTECTED]
Sent: Thu 9/29/2005 9:49 PM
To: Pagano, Tom - Portland, OR
Cc: cygwin@cygwin.com
Subject: Re: date function: how many days in october are there?
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According to Pagano, Tom - Portland, OR on 9/29/2005 9:41 PM:
> I've noticed that the date function does something strange trying to
access October 31st in a statement like
>
> $ date -d "1970-10-01 +1 month -1 day"
> as opposed to something like
> $ date -d "1970-11-01 -1 day"
> which (I think??) should be functionally equivalent. The actual
results of the 2nd are obviously preferrable to the 1st... but I do note
something squirrly going on with the hours in both (daylight savings time?)
Indeed it is daylight savings. date has no cygwin-specific patches, but
the brand new coreutils 5.90 has been released upstream that has some
patches in date parsing. Once I can get that packaged, you may want to
rerun your tests - if the bug is still present at that time, then report
it upstream.
- --
Life is short - so eat dessert first!
Eric Blake [EMAIL PROTECTED]
volunteer cygwin coreutils maintainer
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