TZ changes for Brazil for 2003/2004

Vitor de Matos Carvalho vitor at
Sat Sep 20 20:06:25 UTC 2003


Yes, with small corrections.

Atlantic islands
   east Brazil without daylight-saving time (DST)
     (BA, SE, AL, PE, PB, RN, CE, PI, MA)
   east Brazil with DST (MG, ES, RJ, SP, PR, SC, RS)
   central Brazil without DST (east TO, AP)
   central Brazil whitout DST (west PA, AM, RO, RR)
   central Brazil with DST (DF, GO, MS)
   western Brazil (AC, west AM)

The state of the Amapá (AP) is the only state of the Brazil is in the north with 100% -0300 UTC, been of Pará (Pará) divides in two, half -0300 UTC and to another half -0400 UTC.


Vitor de Matos Carvalho - #5602098
Softinfo Network Administrator
Salvador - Bahia - Brazil
FreeBSD: The silent Workhorse
----- Original Message ----- 
From: "Paul Eggert" <eggert at>
To: "Vitor de Matos Carvalho" <vitor at>
Cc: "Paulo Alexandre Pinto Pires" <p at>; <tz at>
Sent: Saturday, September 20, 2003 3:54 PM
Subject: Re: TZ changes for Brazil for 2003/2004

At 20 Sep 2003 08:24:57 -0300, Vitor de Matos Carvalho writes:

> I saw that in the archive exists America/Fortaleza,
> America/Recife, America/Maceio, I suggest to make one alone
> something as America/Bahia Ilhéus NE Brazil (BA, SE, AL, PE, PI, CE,
> RN, PI, MA), instead of having some entrances for some states of the
> NE of the Brazil, would only join everything in one, in view of that
> no state of the NE will have hourly of summer.

If I understand you correctly, you are suggesting that instead of giving
the user these choices for Brazil:

   Atlantic islands
   Amapa, E Para
   NE Brazil (MA, PI, CE, RN, PR)
   Alagoas, Sergipe
   S & SE Brazil (GO, DF, MG, ES, RJ, SP, PR, SC, RS)
   Mato Grosso do Sul
   Mato Grosso
   W Para, Rondonia
   E Amazonas
   W Amazonas

we simplify matters, and give only these choices:

   Atlantic islands
   east Brazil without daylight-saving time (DST)
     (AL, AP, BA, CE, MA, East PA, PB, mainland PE, PI, RN, SE, TO)
   east Brazil with DST (DF, ES, GO, MG, PR, RJ, RS, SC, SP)
   central Brazil without DST (east AM, MT, west PA, RO, RR)
   central Brazil with DST (MS)
   western Brazil (AC, west AM)

That would indeed be simpler for users that care only about current
and predicted future timestamps.  But it would mishandle timestamps in
the recent past.  For example, if you lived in Mato Grosso and chose
central Brazil without DST, your files dated January 2003 would have
time stamps that were off by one hour, since MG observed DST last year
but not this year.

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