FW: Brazilian Time Zones and DST
-----Original Message----- From: Stefan Johansson [SMTP:jason@stefan-johansson.com] Sent: Monday, November 01, 1999 7:41 PM To: Olson, Arthur David (NCI) Subject: Re: Brazilian Time Zones and DST Dear Mr. Olson, Yes, 1999h reflects the right DST start and stop dates for Brazil, but decree 3188 of 1999-09-30 included the states of SE, AL, PE, PB, RN, CE, PI, MA and RR, further to those already mentioned in decree 3150 of 1999-08-23. Please make the necessary changes in the Brazilian rules, since I am not familiar with the syntax. Enclosed is a draft of a revision of the "southamerica" part of 1999h, where I have inserted the following new lines: # From Stefan Johansson <jason@stefan-johansson.com> (1999-10-02): # Decree 3188 alters decree 3150 adding more states for DST starting 1999-10-03. # Decree <a href="http://pcdsh01.on.br/DecHV99.gif">3,188</a> # (1999-09-30), maintains the dates of Decree 3,150, but includes also the following states: # SE, AL, PE, PB, RN, CE, PI, MA and RR. As a consequence, I would like to suggest the following Brazilian time zones: # Fernando de Noronha, Martin Vaz, Trindade Zone America/Noronha # Amapa, east Para Zone America/Belem # Maranhao, Piaui, Ceara, Rio Grande do Norte, Paraiba, Pernambuco (except # Fernando de Noronha) Zone America/Fortaleza # Tocantins Zone America/Palmas (capital of TO) # Alagoas, Sergipe Zone America/Maceio # Bahia, Goias, Distrito Federal, Minas Gerais, Espirito Santo, Rio de # Janeiro, Sao Paulo, Parana, Santa Catarina, Rio Grande do Sul Zone America/Brasilia # Mato Grosso, Mato Grosso do Sul Zone America/Cuiaba # Roraima Zone America/Boa_Vista # west Para, Rondonia Zone America/Porto_Velho # Amazonas Zone America/Manaus # Acre Zone America/Porto_Acre Sincerely, Stefan Johansson ----- Original Message ----- From: Olson, Arthur David (NCI) <olsona@dc37a.nci.nih.gov> To: 'Stefan Johansson' <jason@stefan-johansson.com> Sent: Monday, November 01, 1999 2:22 PM Subject: RE: Brazilian Time Zones and DST
It looks as if ftp://elsie.nci.nih.gov/pub/tzdata1999h.tar.gz reflects the correct start and stop dates for Brazil.
--ado
<<southamerica2>>
From: Stefan Johansson [SMTP:jason@stefan-johansson.com] Sent: Monday, November 01, 1999 7:41 PM Yes, 1999h reflects the right DST start and stop dates for Brazil, but decree 3188 of 1999-09-30 included the states of SE, AL, PE, PB, RN, CE, PI, MA and RR, further to those already mentioned in decree 3150 of 1999-08-23. Please make the necessary changes in the Brazilian rules, since I am not familiar with the syntax. It should be OK; those changes were installed soon after Decree 3,188 came out. As a consequence, I would like to suggest the following Brazilian time zones: I think the only difference between your suggestions and what's currently in the tz database is the choice of the canonical representative for each region. The TZ database uses Sao Paulo where you suggest Brasilia; Sao Paulo seems correct to me, since Sao Paulo is larger. For Tocantins, though, the TZ database uses Araguaina instead of Palmas. Here I'm not so sure which is right, since I don't know which city is larger, and I don't know how distinctive a name `Palmas' is.
Dear Paul, Comments to what you wrote below: 1) As can be seen from the screen shot attached, taken only 6 minutes ago, Brazil has NOT been updated according to Decree 3188, it is still according to Decree 3150. Cuiabá, Fortaleza and Maceió have DST, meaning Yes instead of No in the table. Furthermore, Roraima is not taken care of rightly, there is the need to add a zone Boa_Vista. 2) Yes, São Paulo is very much bigger than Brasília, in fact it is the biggest city in the whole of South America, BUT everyone in Brazil knows that the official time in Brazil is called "Horário de Brasília", i.e. Brasília time. I think that justifies changing the zone name to Brasília. 3) Palmas is the capital of Tocantins. It has 86,000 inhabitants. Araguaina is bigger right now, with 106,000 habitants, however Palmas is the city that is growing and soon will be the biggest city in the state of TO. Best regards, Stefan Johansson ----- Original Message ----- From: Paul Eggert <eggert@twinsun.com> To: <jason@stefan-johansson.com> Cc: <tz@elsie.nci.nih.gov> Sent: Tuesday, November 02, 1999 10:35 PM Subject: Re: FW: Brazilian Time Zones and DST
From: Stefan Johansson [SMTP:jason@stefan-johansson.com] Sent: Monday, November 01, 1999 7:41 PM
Yes, 1999h reflects the right DST start and stop dates for Brazil, but decree 3188 of 1999-09-30 included the states of SE, AL, PE, PB, RN, CE, PI, MA and RR, further to those already mentioned in decree 3150 of 1999-08-23. Please make the necessary changes in the Brazilian rules, since I am not familiar with the syntax.
It should be OK; those changes were installed soon after Decree 3,188 came out.
As a consequence, I would like to suggest the following Brazilian time zones:
I think the only difference between your suggestions and what's currently in the tz database is the choice of the canonical representative for each region. The TZ database uses Sao Paulo where you suggest Brasilia; Sao Paulo seems correct to me, since Sao Paulo is larger. For Tocantins, though, the TZ database uses Araguaina instead of Palmas. Here I'm not so sure which is right, since I don't know which city is larger, and I don't know how distinctive a name `Palmas' is.
From: "Stefan Johansson" <jason@stefan-johansson.com> Date: Wed, 3 Nov 1999 22:18:46 -0200 1) As can be seen from the screen shot attached, taken only 6 minutes ago, Brazil has NOT been updated according to Decree 3188, Oops. Thanks for pointing this out. I thought that I forwarded a fix for that to the tz list, but now I see that I forgot to. Sorry about that. I will send a patch to the tz mailing list as soon as I can. There are several other changes that I'd been meaning to send (only one having any priority -- the Micronesian island of Kosrae is off by an hour in the current database) and I'll include them too. everyone in Brazil knows that the official time in Brazil is called "Horário de Brasília", i.e. Brasília time. I think that justifies changing the zone name to Brasília. I worry that this would lead to confusion. America/Sao_Paulo covers only Bahia, Goias, Distrito Federal, Minas Gerais, Espirito Santo, Rio de Janeiro, Sao Paulo, Parana, Santa Catarina, and Rio Grande do Sul. But "Horário de Brasília" also currently refers to Maranhao, Piaui, Ceara, Rio Grande do Norte, Paraiba, Pernambuco (except Fernando de Noronha), Tocantins, Alagoas, Sergipe, Mato Grosso, Mato Grosso do Sul; and (ignoring the DST difference) also Amapa and east Para. In other words, the phrase "Horário de Brasília" is as ambiguous as the phrase "US Eastern Time"; it's not clear whether DST should be observed (as in New York and Sao Paulo) or not (as in Indianapolis and Belem), and it's not clear which DST history should be observed. I'd rather avoid the ambiguity if possible. 3) Palmas is the capital of Tocantins. It has 86,000 inhabitants. Araguaina is bigger right now, with 106,000 habitants, however Palmas is the city that is growing and soon will be the biggest city in the state of TO. OK, I suppose we'll have to change at some point then (but not now -- I don't want to offend the Araguaianans :-).
participants (3)
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Olson, Arthur David (NCI) -
Paul Eggert -
Stefan Johansson