FW: corrections to the Brazil timezone data

[Paul Eggert]

> From: Otavio Exel [mailto:oexel at economatica.com.br]
> Sent: Wednesday, October 10, 2001 8:26 AM
> 
> according to the <a href="http://pcdsh01.on.br/HvInic01.htm">Brazilian
> official page</a> on the subject of DST:
> 
> 	DST start: 2001-10-14T00:00:00
> 	DST end:   2002-02-17T00:00:00

Yes, and I think ftp://elsie.nci.nih.gov/pub/tzdata2001d.tar.gz
already reflects this change.  I just built and installed the 2001d
distribution, ran the shell command "zdump -v America/Sao_Paulo |
egrep 'Oct.*2001|Feb.*2002'", and got the following output for time
stamps just before and after the two transitions in question:

America/Sao_Paulo  Sun Oct 14 02:59:59 2001 UTC = Sat Oct 13 23:59:59 2001 BRT isdst=0
America/Sao_Paulo  Sun Oct 14 03:00:00 2001 UTC = Sun Oct 14 01:00:00 2001 BRST isdst=1
America/Sao_Paulo  Sun Feb 17 01:59:59 2002 UTC = Sat Feb 16 23:59:59 2002 BRST isdst=1
America/Sao_Paulo  Sun Feb 17 02:00:00 2002 UTC = Sat Feb 16 23:00:00 2002 BRT isdst=0

This matches the dates and times that you give, so I don't think
any change is needed.


> -Rule   Brazil  2000    max     -       Oct     Sun>=8   0:00   1:00    S
> -Rule   Brazil  2001    max     -       Feb     Sun>=15  0:00   0       -

These rules say "From the 2nd Sunday in October (i.e. the first Sunday
on or after the 8th) at 00:00 local time, to the 3rd Sunday in
February (i.e. the first Sunday on or after the 15th) at 00:00 local
time".  These rules are what generated the transitions listed above.