[tz] Falklands

[Tim Parenti]

Forgive me if I'm wrong, but the proposed changes to Atlantic/Stanley seem
to have a double-effect.  Taking out the rule from 2012 to max which ends
DST in April would put the zone on permanent DST effective at the final
change, which I'm reading as the Sunday 5 September 2010.  But then the
zone change listed for 16 April 2011 seems to move the clocks forward an
hour further, to UTC–3+1 (which is wrong).

Much like we handled Russia's "permanent DST," I believe a more appropriate
(and correct) patch would be as follows:

*** a/southamerica    Fri Oct 14 23:46:37 2011
--- c/southamerica    Wed Feb 29 14:41:38 2012
***************
*** 1415,1428 ****
  Rule    Falk    1985    2000    -    Sep    Sun>=9    0:00    1:00    S
  Rule    Falk    1986    2000    -    Apr    Sun>=16    0:00    0    -
  Rule    Falk    2001    2010    -    Apr    Sun>=15    2:00    0    -
! Rule    Falk    2012    max    -    Apr    Sun>=15    2:00    0    -
! Rule    Falk    2001    max    -    Sep    Sun>=1    2:00    1:00    S
  # Zone    NAME        GMTOFF    RULES    FORMAT    [UNTIL]
  Zone Atlantic/Stanley    -3:51:24 -    LMT    1890
              -3:51:24 -    SMT    1912 Mar 12  # Stanley Mean Time
              -4:00    Falk    FK%sT    1983 May     # Falkland Is Time
              -3:00    Falk    FK%sT    1985 Sep 15
!             -4:00    Falk    FK%sT

  # French Guiana
  # Zone    NAME        GMTOFF    RULES    FORMAT    [UNTIL]
--- 1415,1428 ----
  Rule    Falk    1985    2000    -    Sep    Sun>=9    0:00    1:00    S
  Rule    Falk    1986    2000    -    Apr    Sun>=16    0:00    0    -
  Rule    Falk    2001    2010    -    Apr    Sun>=15    2:00    0    -
! Rule    Falk    2001    2010    -    Sep    Sun>=1    2:00    1:00    S
  # Zone    NAME        GMTOFF    RULES    FORMAT    [UNTIL]
  Zone Atlantic/Stanley    -3:51:24 -    LMT    1890
              -3:51:24 -    SMT    1912 Mar 12  # Stanley Mean Time
              -4:00    Falk    FK%sT    1983 May     # Falkland Is Time
              -3:00    Falk    FK%sT    1985 Sep 15
!             -4:00    Falk    FK%sT    2010 Sep 5 2:00
!             -3:00    -    FKST

  # French Guiana
  # Zone    NAME        GMTOFF    RULES    FORMAT    [UNTIL]

--
Tim Parenti



On Mon, Feb 27, 2012 at 01:22, Alan Barrett <apb at cequrux.com> wrote:

> On Mon, 27 Feb 2012, Robert Elz wrote:
>
>> I'd particularly appreciate someone (many someone's...) casting an eye
>> over the change to the Falklands zone definition (Atlantic/Stanley) to see
>> if you agree with the way I made that change.
>>
>
> The change seems to match the comments.  It would probably have been
> sufficient to change the "Falk" DST rules without changing the
> "America/Stanley" rules, but changing them both seems fine.
>
> --apb (Alan Barrett)
>
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