[tz] timezone history of Uruguay

[Tim Parenti]

Thanks for that, Michael.  I had missed that Resolución and didn't think to
look for it, since it wasn't directly referenced by the Almanaque.  The
original reason for the guesswork there was simply that the 1926 law,
unlike most of the others, didn't explicitly give a transition time in its
text or nearby, and the Almanaque's loose "VERANO/INVIERNO" notations
didn't themselves lend a lot of confidence in the dates given for that era.

I certainly could have been a bit more thorough in looking through the
Diario for nearby dates.  Further proposed patch attached.

Thanks again.

--
Tim Parenti

On 20 February 2018 at 08:51, Michael Deckers <michael.h.deckers at googlemail.
com> wrote:

>
>   On 2018-02-16 17:58, Paul Eggert proposed:
>
>
> +# .......  Assume transitions at 24:00 on the specified days until Ley No.
>> +# 7919 of 1926-03-05 ended this arrangement, repealing all "laws and
>> other
>> +# provisions which oppose" it, resulting immediately in year-round
>> UT-03:30.
>> +# (Since we don't know the time at which the change became law, assume
>> clocks
>> +# were changed at 24:00 that evening.  Almanaque 2018 is a bit
>> hand-wavey here,
>> +# anyway.)
>> +#.......
>> +# https://www.impo.com.uy/diariooficial/1926/03/10/2
>> +#.......
>> +Rule    Uruguay    1926    only    -    Mar     5    24:00    0  -
>>
>>   The proposed date of the switch, 1926-03-06, would be before the
> publication
>   of the law, which seems to be unlikely. Anyway, the Almanaque 2018
> explicitly
>   says that the switch was on 1926-04-01, the date specified by the law of
> 1923,
>   and so does the Resolución of 1926-03-11 published in
>       [http://www.impo.com.uy/diariooficial/1926/03/18/2].
>   I propose that tzdb follow these sources, rather than make an estimate.
>
>   Michael Deckers.
>
>
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