Bill Unruh wrote:

> Ah, ok. But then he should subscribe to the mailing list while he is asking
> questions of the list or the newgroup. Ie, expecting people to privately

Definitely.


> ftp://elsie.nci.nih.gov/pub/tzdata*.gz
> which can be downloaded from the web. In that file are listed all the known

"known" may be the issue.  Unless the country is Morocco, in which case 
it is untrue that they have never had DST changes (although the last one 
was quite possibly before the questioner was born (1978), there is no 
trace of a matching rule in asia or africa, the two files that have 
changed recently.

If it is is Morocco, Olson believes that the change is at 00:00:00 UTC, 
not at 12:01:00, or even 00:01:00 UTC.  If it is actually one of these, 
Olson needs an urgent update - it may be too late to not do it 
retrospectively.  (The Olson data indicates a change to DST at 12:00:00 
UTC 1967, so it is certainly possible that the 12:01 was in 24 hour 
format and doesn't mean 12:01 am.)

I think Morocco is quite likely.

> 
> Under Windows, I do not believe any such structure exists, and you have to
> persuade Microsoft to publish a patch for your system which contains the

The information is held in the registry, or similar.  The Morroco (and 
Pakistan) changes were too late for Microsoft, but there is a, possibly 
unofficial, advisory 
<http://blogs.msdn.com/nickmac/archive/2008/05/30/advisory-changes-to-daylight-saving-time-in-morocco-and-pakistan-on-june-1-2008.aspx>
 
pointing to the manual procedure.

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