On Wed, Jul 11, 2012 at 2:46 PM, Larry Leung <crealisiss@yahoo.com> wrote:

Hi,
with respect to 2012c south america. San Luis appears to have a zone/rule inconsistency. The latest zone indicates using rule SanLuis, but the rule is used only until 2009. For dates past 2009 is there consistency?

# San Luis (SL)

Rule SanLuis 2008 2009 - Mar Sun>=8 0:00 0 -

Rule SanLuis 2007 2009 - Oct Sun>=8 0:00 1:00 S

Zone America/Argentina/San_Luis -4:25:24 - LMT 1894 Oct 31
  .

  .
  .

-3:00 Arg AR%sT 2008 Jan 21
-4:00 SanLuis WAR%sT

I'm not sure how this is treated "by the book" (however, I know, at least in my linux's libc it 'just works').

However, the San Luis Province call this "Western Argentina Daylight Savings Time" because they consider that WART is at UTC-0400 and they "got stuck" in WARST (at UTC-0300), whereas the rest of the country calls this Argentina Time at UTC-0300.

Rereading the southamerica source, I also notice there is no 'Arg' rule after 2009 but, since there are no invocation of any of these rules after 2008, I think it's just fine.