Re: Updating RH box for upcoming DST change

[Ray Holtz <ray@rayholtz.com>]

Ok, so what happens when you run these and get different information?

[ray@server zoneinfo]$ /usr/sbin/zdump -v America/Chicago |grep 2007
America/Chicago  Sun Mar 11 07:59:59 2007 UTC = Sun Mar 11 01:59:59 2007 
CST isdst=0 gmtoff=-21600
America/Chicago  Sun Mar 11 08:00:00 2007 UTC = Sun Mar 11 03:00:00 2007 
CDT isdst=1 gmtoff=-18000
America/Chicago  Sun Nov  4 06:59:59 2007 UTC = Sun Nov  4 01:59:59 2007 
CDT isdst=1 gmtoff=-18000
America/Chicago  Sun Nov  4 07:00:00 2007 UTC = Sun Nov  4 01:00:00 2007 
CST isdst=0 gmtoff=-21600
[ray@server zoneinfo]$ date -d '1970-01-01 UTC +1173679260 seconds'
Mon Mar 12 00:01:00 CST 2007




Ed Howland wrote:
> On 2/14/07, Robert Citek <rwcitek@alum.calberkeley.org> wrote:
>> Steven Pritchard wrote:
>> > I just saw someone mention on IRC that a good test for this is to run
>> > the following command:
>> >
>> >   date -d '1970-01-01 UTC +1173679260 seconds'
>> >
>> > On systems with the wrong tzdata, you'll get this:
>> >
>> >   Mon Mar 12 00:01:00 CST 2007
>> >
>> > You should get this though:
>> >
>> >   Mon Mar 12 01:01:00 CDT 2007
>>
>> That's a great test.  Thanks, Steve.
>>
>> Regards,
>> - Robert
> 
> That is good.
> 
> Another one is
> 
> zdump -v America/Chicago |grep 2007
> 
> You should see
> America/Chicago  Sun Mar 11 07:59:59 2007 UTC = Sun Mar 11 01:59:59
> 2007 CST isdst=0 gmtoff=-21600
> America/Chicago  Sun Mar 11 08:00:00 2007 UTC = Sun Mar 11 03:00:00
> 2007 CDT isdst=1 gmtoff=-18000
> America/Chicago  Sun Nov  4 06:59:59 2007 UTC = Sun Nov  4 01:59:59
> 2007 CDT isdst=1 gmtoff=-18000
> America/Chicago  Sun Nov  4 07:00:00 2007 UTC = Sun Nov  4 01:00:00
> 2007 CST isdst=0 gmtoff=-21600
> 
> If the dates are Apr and Oct, you have the wrong tzdata.
> 
> Ed
> 



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