You have been subscribed to a public bug by Jamie Strandboge (jdstrand):

Binary package hint: tzdata

http://www.planalto.gov.br/ccivil_03/_ato2007-2010/2008/decreto/d6558.htm

According to the above decree, Brazil has now a permanent rule for daylight 
saving
time:

DST begins always on the 3rd sunday in October. No exception.

DST ends always on the 3rd sunday in February, except when that date is the
carnival sunday (49 days before Easter). In such a case, the DST ends on the
next sunday, the 4th sunday of february.

Yes, the rule itself is quite complicated and very stupid. It doesn't fit in
the zic structure, since it has no lunar calendar calculations. Therefore, it
must be informed year by year in the file 'southamerica'.

I've written a Python script[1] to calculate it. That script generates the
lines for 'southamerica'. That was the best I could do. Reengineering the zic
compiler would be too much for me. :-)

[1] http://hackers.propus.com.br/~marlon/dst/dst-brazil.py

** Affects: tzdata (Ubuntu)
     Importance: Undecided
         Status: New

-- 
New Brazilian DST rules, now permanent
https://bugs.launchpad.net/bugs/278352
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