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make/data/tzdata/southamerica

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@@ -46,11 +46,11 @@
 # For data circa 1899, a common source is:
 # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94.
 # https://www.jstor.org/stable/1774359
 #
 # These tables use numeric abbreviations like -03 and -0330 for
-# integer hour and minute UTC offsets.  Although earlier editions used
+# integer hour and minute UT offsets.  Although earlier editions used
 # alphabetic time zone abbreviations, these abbreviations were
 # invented and did not reflect common practice.
 
 ###############################################################################
 

@@ -600,11 +600,11 @@
 
 # Bolivia
 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
 Zone    America/La_Paz  -4:32:36 -      LMT     1890
                         -4:32:36 -      CMT     1931 Oct 15 # Calamarca MT
-                        -4:32:36 1:00   BOST    1932 Mar 21 # Bolivia ST
+                        -4:32:36 1:00   BST     1932 Mar 21 # Bolivia ST
                         -4:00   -       -04
 
 # Brazil
 
 # From Paul Eggert (1993-11-18):

@@ -929,16 +929,29 @@
 # According to this decree
 # http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm
 # [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the
 # 3rd Feb Sunday. There is an exception on the return date when this is
 # the Carnival Sunday then the return date will be the next Sunday...
-Rule    Brazil  2008    max     -       Oct     Sun>=15 0:00    1:00    S
+Rule    Brazil  2008    2017    -       Oct     Sun>=15 0:00    1:00    S
 Rule    Brazil  2008    2011    -       Feb     Sun>=15 0:00    0       -
+# Decree 7,584 <http://pcdsh01.on.br/HVdecreto7584_20111013.jpg> (2011-10-13)
+# added Bahia.
 Rule    Brazil  2012    only    -       Feb     Sun>=22 0:00    0       -
+# Decree 7,826 <http://pcdsh01.on.br/HVdecreto7826_20121015.jpg> (2012-10-15)
+# removed Bahia and added Tocantins.
+# Decree 8,112 <http://pcdsh01.on.br/HVdecreto8112_20130930.JPG> (2013-09-30)
+# removed Tocantins.
 Rule    Brazil  2013    2014    -       Feb     Sun>=15 0:00    0       -
 Rule    Brazil  2015    only    -       Feb     Sun>=22 0:00    0       -
 Rule    Brazil  2016    2022    -       Feb     Sun>=15 0:00    0       -
+# From Steffen Thorsen (2017-12-18):
+# According to many media sources, next year's DST start in Brazil will move to
+# the first Sunday of November, and it will stay like that for the years after.
+# ... https://www.timeanddate.com/news/time/brazil-delays-dst-2018.html
+# From Steffen Thorsen (2017-12-20):
+# http://www.planalto.gov.br/ccivil_03/_ato2015-2018/2017/decreto/D9242.htm
+Rule    Brazil  2018    max     -       Nov     Sun>=1  0:00    1:00    S
 Rule    Brazil  2023    only    -       Feb     Sun>=22 0:00    0       -
 Rule    Brazil  2024    2025    -       Feb     Sun>=15 0:00    0       -
 Rule    Brazil  2026    only    -       Feb     Sun>=22 0:00    0       -
 Rule    Brazil  2027    2033    -       Feb     Sun>=15 0:00    0       -
 Rule    Brazil  2034    only    -       Feb     Sun>=22 0:00    0       -

@@ -1089,11 +1102,11 @@
 
 # Chile
 
 # From Paul Eggert (2015-04-03):
 # Shanks & Pottenger says America/Santiago introduced standard time in
-# 1890 and rounds its UTC offset to 70W40; guess that in practice this
+# 1890 and rounds its UT offset to 70W40; guess that in practice this
 # was the same offset as in 1916-1919.  It also says Pacific/Easter
 # standardized on 109W22 in 1890; assume this didn't change the clocks.
 #
 # Dates for America/Santiago from 1910 to 2004 are primarily from
 # the following source, cited by Oscar van Vlijmen (2006-10-08):
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