Daylight savings time / 6.1 and 4.11

[Murray Taylor]

> -----Original Message-----
> From: owner-freebsd-questions at freebsd.org 
> [mailto:owner-freebsd-questions at freebsd.org] On Behalf Of Josef Grosch
> Sent: Friday, 19 January 2007 10:59 AM
> To: hal
> Cc: freebsd-questions at freebsd.org
> Subject: Re: Daylight savings time / 6.1 and 4.11
> 
> On Tue, Jan 16, 2007 at 01:31:22PM -0700, hal wrote:
> > This came down from above?!
> > 
> > Beginning in 2007, Daylight Savings Time will be lengthened 
> one month  
> > by starting three weeks earlier (2AM on the second Sunday 
> in March)  
> > and ending one week later (2AM on the first Sunday in November).
> > 
> > 
> > What patch levels do I need to be at for my 4.7 and 6.1 
> systems to be
> > daylight savings 2007 ready?
> > 
> > Currently: 4.11-RELEASE-p25
> > 
> > Currently: 6.1-RELEASE-p10
> > 
> > hal
> 
> 
> This is an issue here at work. We have very many FreeBSD 4.x 
> machines and a
> growing number of FreeBSD 6.x. The change when daylight 
> saving time starts
> and ends is an issue for machines in the United States and, we think,
> those in Canada. The way to check if your zone file is 
> correct is to do
> 
>     zdump -v /etc/localtime | more
> 
> Look for the following
> 
> 
>     /etc/localtime  Sun Mar 11 09:59:59 2007 UTC = Sun Mar 11 
> 01:59:59 2007 PST isdst=0 gmtoff=-28800
>     /etc/localtime  Sun Mar 11 10:00:00 2007 UTC = Sun Mar 11 
> 03:00:00 2007 PDT isdst=1 gmtoff=-25200
>     /etc/localtime  Sun Nov  4 08:59:59 2007 UTC = Sun Nov  4 
> 01:59:59 2007 PDT isdst=1 gmtoff=-25200
>     /etc/localtime  Sun Nov  4 09:00:00 2007 UTC = Sun Nov  4 
> 01:00:00 2007 PST isdst=0 gmtoff=-28800
> 
> If you see this, your zone file will handle the change 
> correctly. The 6.x
> series has the corrected zone files. 4.x does not have this. 
> The best way
> to handle this is to copy the zone file from 
> /usr/share/zoneinfo on a 6.x
> machine to your 4.x. 
> 
> 
> Josef
>

port misc/zoneinfo

runs on all os versions, fixes all zone files 

caveat: current ports tree
caveat: only works if the DST change has been added to the NIST 
   master files .... 

mjt
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