DST in west Amazonas and Fernando de Noronha
eggert at twinsun.com
Mon Dec 4 23:41:30 UTC 2000
> Date: Fri, 03 Nov 2000 19:17:14 -0600
> From: <jnorgard at Prodigy.Net.mx>
Thanks for those pointers; I'll put them somewhere in my next proposed
> Since the TZ database for Brazil has been elaborated per state, we
> have an obligation to document the exceptions from that.
Yes, I think we should add a new entry, since as far as I can see,
west Amazonas observed DST in 1993/1994, whereas Acre did not; so it's
not the case that the two regions' clocks have been the same since 1970.
> Therefore I suggest to put a second entry in the TZ database for
> Amazonas as "America/Atalaia_do_Norte" or something like that.
The above-listed web page mentions Atalaia do Norte, Boca do Maoco,
Benjamin Constant, Eirunepé, Envira, and Ipixuna as being in west
Amazonas. I don't know offhand whether these are cities or districts.
I can't access the Brazilian Census Bureau pages at
<http://www.ibge.gov.br/ibge/default.php> (my Netscape 4.76 Solaris
<http://www.dcc.ufrj.br/~cristina/dadosam.html> gives the following
cities in Amazonas, in decreasing order of population:
SAO GABRIEL DA CACHOEIRA 26992
BENJAMIN CONSTANT 23633
ATALAIA DO NORTE 8108
So it appears that America/Eirunepe would be a better choice than
Atalaia do Norte. However, I don't see a population entry for Boca do
Maoco, and I'm not sure what that is (perhaps a district?).
> According to these official pages, Fernando do Noronha has been on
> DST for some while back (e.g. before October 15 where the status
> probably changed).
I don't read the pages that way. http://pcdsh01.on.br/Fusbr.htm and
http://pcdsh01.on.br/Fusbrhv.htm both list Fernando de Noronha as
being 2 hours behind UTC. It is a little tricky, since the pages also
list the offset from Brasilia, and this offset does differ between
winter and summer.
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