CentOS - Nov 2005 - New Standard/Daylight time-change dates in rhel4u2 but not centos4.2?

>From a login on a machine with rhel4u2
I can execute the following commands and get
the indicated output:

date --date="Mar 25 15:00:00 UTC 2006"
    Sat Mar 25 10:00:00 EST 2006

date --date="Mar 25 15:00:00 UTC 2007"
    Sun Mar 25 11:00:00 EDT 2007

As you can see, the output differs for 2006 and 2007.  That
indicates that rhel4u2 includes changes required by the
"Energy Policy Act of 2005," which mandates new dates for
transition between Standard Time and Daylight Saving Time
starting in 2007.

If I do the same thing on a machine with
"CentOS release 4.2 (Final)", I get the following output:

date --date="Mar 25 15:00:00 UTC 2006"
    Sat Mar 25 10:00:00 EST 2006

date --date="Mar 25 15:00:00 UTC 2007"
    Sun Mar 25 10:00:00 EST 2007

So it looks as if CentOS4.2 does not yet have that change.

Is that correct?  Or is there perhaps some installation
parameter that I have missed in installing CentOS4.2?

Thanks for any info.

Stowe Davison

s.davison at computer.org wrote:
>
>>From a login on a machine with rhel4u2
>I can execute the following commands and get
>the indicated output:
>
>date --date="Mar 25 15:00:00 UTC 2006"
>    Sat Mar 25 10:00:00 EST 2006
>
>date --date="Mar 25 15:00:00 UTC 2007"
>    Sun Mar 25 11:00:00 EDT 2007
>
>As you can see, the output differs for 2006 and 2007.  That
>indicates that rhel4u2 includes changes required by the
>"Energy Policy Act of 2005," which mandates new dates for
>transition between Standard Time and Daylight Saving Time
>starting in 2007.
>
>If I do the same thing on a machine with
>"CentOS release 4.2 (Final)", I get the following output:
>
>date --date="Mar 25 15:00:00 UTC 2006"
>    Sat Mar 25 10:00:00 EST 2006
>
>date --date="Mar 25 15:00:00 UTC 2007"
>    Sun Mar 25 10:00:00 EST 2007
>
>So it looks as if CentOS4.2 does not yet have that change.
>
>Is that correct?  Or is there perhaps some installation
>parameter that I have missed in installing CentOS4.2?
>
>Thanks for any info.
>
>Stowe Davison
>  
>
Works fine in the US Central time zone:

    [rj at mavis ~]$ date --date="Mar 25 15:00:00 UTC 2006"
    Sat Mar 25 09:00:00 CST 2006
    [rj at mavis ~]$ date --date="Mar 25 15:00:00 UTC 2007"
    Sun Mar 25 10:00:00 CDT 2007

Do you have tzdata-2005m-1.EL4 installed?

    [rj at mavis ~]$ rpm -qi tzdata
    Name        : tzdata                       Relocations: (not
    relocatable)
    Version     : 2005m                             Vendor: CentOS
    Release     : 1.EL4                         Build Date: Fri 07 Oct
    2005 06:03:09 AM CDT
    Install Date: Wed 19 Oct 2005 11:56:56 AM CDT      Build Host:
    x8664-build.home.local
    Group       : System Environment/Base       Source RPM:
    tzdata-2005m-1.EL4.src.rpm
    Size        : 655994                           License: GPL
    Signature   : DSA/SHA1, Fri 07 Oct 2005 08:48:38 AM CDT, Key ID
    a53d0bab443e1821
    Packager    : Johnny Hughes <johnny at centos.org>
    Summary     : Timezone data
    Description :
    This package contains data files with rules for various timezones around
    the world.
    [rj at mavis
    ~]$

>-----Original Message-----
>From: Aleksandar Milivojevic [mailto:alex at milivojevic.org]
>Sent: Monday, November 7, 2005 03:32 PM
>To: centos at centos.org
>Subject: Re: [CentOS] New Standard/Daylight time-change dates in rhel4u2	but
not centos4.2?
>
>Quoting Robert <kerplop at sbcglobal.net>:
>
>> Works fine in the US Central time zone:
>
>Maybe his CentOS machine is setup to use *Canadian* time zone file (in 
>his case,
>it was Eastern).  As a quick test, I'd suggest doing:
>
>$ diff /etc/localtime /usr/share/zoneinfo/Canada/Eastern
>$ diff /etc/localtime /usr/share/zoneinfo/US/Eastern
>
>(or "Central", if local time zone is standard central time).
>
>If he's on Canadian time, just copy the appropriate file from US
subdirectory
>over /etc/localtime to get back to US time.  
Many thanks, that was basically the problem.  It 
wasn't Canadian time, but it was the wrong 
/etc/localtime.  I don't know where that 
/etc/localtime came from -- it's not the same
as any of the files in the /usr/share/zoneinfo
hierarchy.  But putting US/Eastern in there did
the trick.

Stowe Davison

Quoting s.davison at computer.org:
> As you can see, the output differs for 2006 and 2007.  That
> indicates that rhel4u2 includes changes required by the
> "Energy Policy Act of 2005," which mandates new dates for
> transition between Standard Time and Daylight Saving Time
> starting in 2007.
[snip]
> So it looks as if CentOS4.2 does not yet have that change.
Also, check this bug report.  It relates directly to /etc/localtime not 
updated
when tzdata package is updated, which is most likely exactly the problem that
you have.  It seems Red Hat closed the issue with wontfix.  Mental note,
manually update /etc/localtime after tzdata package is updated.

https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=107507

I also want to take opportunity to apologize for that personal and totally off
topic comment at the end of my last reply that flared way too many responses.


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