Revert "Revert "zoneinfo - update to tzdata2017b""

This reverts commit 9638a962cb74b082d334b7674888b26556002bb4.

8 files changed, 875 insertions, 33 deletions

diff --git a/zoneinfo/America/Indiana/Indianapolis.ics b/zoneinfo/America/Indiana/Indianapolis.ics
index c27bd27e..015d0a11 100644
--- a/zoneinfo/America/Indiana/Indianapolis.ics
+++ b/zoneinfo/America/Indiana/Indianapolis.ics
@@ -2,20 +2,114 @@ BEGIN:VCALENDAR
 PRODID:-//citadel.org//NONSGML Citadel calendar//EN
 VERSION:2.0
 BEGIN:VTIMEZONE
-TZID:/citadel.org/20070227_1/America/Indiana/Indianapolis
+TZID:/citadel.org/20170826_1/America/Indiana/Indianapolis
+LAST-MODIFIED:20170826T195802Z
 X-LIC-LOCATION:America/Indiana/Indianapolis
+X-PROLEPTIC-TZNAME:LMT
+BEGIN:STANDARD
+TZNAME:CST
+TZOFFSETFROM:-054438
+TZOFFSETTO:-0600
+DTSTART:18831118T121522
+END:STANDARD
+BEGIN:DAYLIGHT
+TZNAME:CDT
+TZOFFSETFROM:-0600
+TZOFFSETTO:-0500
+DTSTART:19180331T020000
+RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU;UNTIL=19190330T080000Z
+END:DAYLIGHT
+BEGIN:STANDARD
+TZNAME:CST
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0600
+DTSTART:19181027T020000
+RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU;UNTIL=19191026T070000Z
+END:STANDARD
 BEGIN:DAYLIGHT
+TZNAME:CDT
+TZOFFSETFROM:-0600
+TZOFFSETTO:-0500
+DTSTART:19410622T020000
+END:DAYLIGHT
+BEGIN:STANDARD
+TZNAME:CST
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0600
+DTSTART:19410928T020000
+RDATE:19570929T020000
+END:STANDARD
+BEGIN:DAYLIGHT
+TZNAME:CWT
+TZOFFSETFROM:-0600
+TZOFFSETTO:-0500
+DTSTART:19420209T020000
+END:DAYLIGHT
+BEGIN:DAYLIGHT
+TZNAME:CPT
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0500
+DTSTART:19450814T180000
+END:DAYLIGHT
+BEGIN:STANDARD
+TZNAME:CST
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0600
+DTSTART:19450930T020000
+RRULE:FREQ=YEARLY;BYMONTH=9;BYDAY=-1SU;UNTIL=19540926T070000Z
+END:STANDARD
+BEGIN:DAYLIGHT
+TZNAME:CDT
+TZOFFSETFROM:-0600
+TZOFFSETTO:-0500
+DTSTART:19460428T020000
+RRULE:FREQ=YEARLY;BYMONTH=4;BYDAY=-1SU;UNTIL=19540425T080000Z
+END:DAYLIGHT
+BEGIN:STANDARD
+TZNAME:EST
+TZOFFSETFROM:-0600
+TZOFFSETTO:-0500
+DTSTART:19550424T020000
+RDATE:19580427T020000
+END:STANDARD
+BEGIN:DAYLIGHT
+TZNAME:EDT
 TZOFFSETFROM:-0500
 TZOFFSETTO:-0400
+DTSTART:19690427T020000
+RRULE:FREQ=YEARLY;BYMONTH=4;BYDAY=-1SU;UNTIL=19700426T070000Z
+END:DAYLIGHT
+BEGIN:STANDARD
+TZNAME:EST
+TZOFFSETFROM:-0400
+TZOFFSETTO:-0500
+DTSTART:19691026T020000
+RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU;UNTIL=19701025T060000Z
+END:STANDARD
+BEGIN:DAYLIGHT
 TZNAME:EDT
-DTSTART:19700308T020000
-RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0400
+DTSTART:20060402T020000
 END:DAYLIGHT
 BEGIN:STANDARD
+TZNAME:EST
 TZOFFSETFROM:-0400
 TZOFFSETTO:-0500
+DTSTART:20061029T020000
+END:STANDARD
+BEGIN:DAYLIGHT
+TZNAME:EDT
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0400
+DTSTART:20070311T020000
+RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU
+END:DAYLIGHT
+BEGIN:STANDARD
 TZNAME:EST
-DTSTART:19701101T020000
+TZOFFSETFROM:-0400
+TZOFFSETTO:-0500
+DTSTART:20071104T020000
 RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU
 END:STANDARD
 END:VTIMEZONE
diff --git a/zoneinfo/America/Indiana/Knox.ics b/zoneinfo/America/Indiana/Knox.ics
index 85583c8c..87552a70 100644
--- a/zoneinfo/America/Indiana/Knox.ics
+++ b/zoneinfo/America/Indiana/Knox.ics
@@ -2,20 +2,150 @@ BEGIN:VCALENDAR
 PRODID:-//citadel.org//NONSGML Citadel calendar//EN
 VERSION:2.0
 BEGIN:VTIMEZONE
-TZID:/citadel.org/20070227_1/America/Indiana/Knox
+TZID:/citadel.org/20170826_1/America/Indiana/Knox
+LAST-MODIFIED:20170826T195802Z
 X-LIC-LOCATION:America/Indiana/Knox
+X-PROLEPTIC-TZNAME:LMT
+BEGIN:STANDARD
+TZNAME:CST
+TZOFFSETFROM:-054630
+TZOFFSETTO:-0600
+DTSTART:18831118T121330
+END:STANDARD
 BEGIN:DAYLIGHT
+TZNAME:CDT
 TZOFFSETFROM:-0600
 TZOFFSETTO:-0500
+DTSTART:19180331T020000
+RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU;UNTIL=19190330T080000Z
+END:DAYLIGHT
+BEGIN:STANDARD
+TZNAME:CST
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0600
+DTSTART:19181027T020000
+RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU;UNTIL=19191026T070000Z
+END:STANDARD
+BEGIN:DAYLIGHT
+TZNAME:CWT
+TZOFFSETFROM:-0600
+TZOFFSETTO:-0500
+DTSTART:19420209T020000
+END:DAYLIGHT
+BEGIN:DAYLIGHT
+TZNAME:CPT
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0500
+DTSTART:19450814T180000
+END:DAYLIGHT
+BEGIN:STANDARD
+TZNAME:CST
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0600
+DTSTART:19450930T020000
+RDATE:19631027T020000
+RDATE:20061029T020000
+END:STANDARD
+BEGIN:DAYLIGHT
 TZNAME:CDT
-DTSTART:19700308T020000
-RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU
+TZOFFSETFROM:-0600
+TZOFFSETTO:-0500
+DTSTART:19470427T020000
+RRULE:FREQ=YEARLY;BYMONTH=4;BYDAY=-1SU;UNTIL=19610430T080000Z
+END:DAYLIGHT
+BEGIN:STANDARD
+TZNAME:CST
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0600
+DTSTART:19470928T020000
+RRULE:FREQ=YEARLY;BYMONTH=9;BYDAY=-1SU;UNTIL=19540926T070000Z
+END:STANDARD
+BEGIN:STANDARD
+TZNAME:CST
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0600
+DTSTART:19551030T020000
+RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU;UNTIL=19561028T070000Z
+END:STANDARD
+BEGIN:STANDARD
+TZNAME:CST
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0600
+DTSTART:19570929T020000
+RRULE:FREQ=YEARLY;BYMONTH=9;BYDAY=-1SU;UNTIL=19580928T070000Z
+END:STANDARD
+BEGIN:STANDARD
+TZNAME:CST
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0600
+DTSTART:19591025T020000
+RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU;UNTIL=19611029T070000Z
+END:STANDARD
+BEGIN:STANDARD
+TZNAME:EST
+TZOFFSETFROM:-0600
+TZOFFSETTO:-0500
+DTSTART:19620429T020000
+END:STANDARD
+BEGIN:DAYLIGHT
+TZNAME:CDT
+TZOFFSETFROM:-0600
+TZOFFSETTO:-0500
+DTSTART:19670430T020000
+RRULE:FREQ=YEARLY;BYMONTH=4;BYDAY=-1SU;UNTIL=19730429T080000Z
 END:DAYLIGHT
 BEGIN:STANDARD
+TZNAME:CST
 TZOFFSETFROM:-0500
 TZOFFSETTO:-0600
+DTSTART:19671029T020000
+RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU;UNTIL=19901028T070000Z
+END:STANDARD
+BEGIN:DAYLIGHT
+TZNAME:CDT
+TZOFFSETFROM:-0600
+TZOFFSETTO:-0500
+DTSTART:19740106T020000
+RDATE:19750223T020000
+END:DAYLIGHT
+BEGIN:DAYLIGHT
+TZNAME:CDT
+TZOFFSETFROM:-0600
+TZOFFSETTO:-0500
+DTSTART:19760425T020000
+RRULE:FREQ=YEARLY;BYMONTH=4;BYDAY=-1SU;UNTIL=19860427T080000Z
+END:DAYLIGHT
+BEGIN:DAYLIGHT
+TZNAME:CDT
+TZOFFSETFROM:-0600
+TZOFFSETTO:-0500
+DTSTART:19870405T020000
+RRULE:FREQ=YEARLY;BYMONTH=4;BYDAY=1SU;UNTIL=19910407T080000Z
+END:DAYLIGHT
+BEGIN:STANDARD
+TZNAME:EST
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0500
+DTSTART:19911027T020000
+END:STANDARD
+BEGIN:DAYLIGHT
+TZNAME:CDT
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0500
+DTSTART:20060402T020000
+END:DAYLIGHT
+BEGIN:DAYLIGHT
+TZNAME:CDT
+TZOFFSETFROM:-0600
+TZOFFSETTO:-0500
+DTSTART:20070311T020000
+RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU
+END:DAYLIGHT
+BEGIN:STANDARD
 TZNAME:CST
-DTSTART:19701101T020000
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0600
+DTSTART:20071104T020000
 RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU
 END:STANDARD
 END:VTIMEZONE
diff --git a/zoneinfo/America/Indiana/Marengo.ics b/zoneinfo/America/Indiana/Marengo.ics
index 4880f2e2..def18336 100644
--- a/zoneinfo/America/Indiana/Marengo.ics
+++ b/zoneinfo/America/Indiana/Marengo.ics
@@ -2,20 +2,127 @@ BEGIN:VCALENDAR
 PRODID:-//citadel.org//NONSGML Citadel calendar//EN
 VERSION:2.0
 BEGIN:VTIMEZONE
-TZID:/citadel.org/20070227_1/America/Indiana/Marengo
+TZID:/citadel.org/20170826_1/America/Indiana/Marengo
+LAST-MODIFIED:20170826T195802Z
 X-LIC-LOCATION:America/Indiana/Marengo
+X-PROLEPTIC-TZNAME:LMT
+BEGIN:STANDARD
+TZNAME:CST
+TZOFFSETFROM:-054523
+TZOFFSETTO:-0600
+DTSTART:18831118T121437
+END:STANDARD
+BEGIN:DAYLIGHT
+TZNAME:CDT
+TZOFFSETFROM:-0600
+TZOFFSETTO:-0500
+DTSTART:19180331T020000
+RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU;UNTIL=19190330T080000Z
+END:DAYLIGHT
+BEGIN:STANDARD
+TZNAME:CST
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0600
+DTSTART:19181027T020000
+RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU;UNTIL=19191026T070000Z
+END:STANDARD
+BEGIN:DAYLIGHT
+TZNAME:CWT
+TZOFFSETFROM:-0600
+TZOFFSETTO:-0500
+DTSTART:19420209T020000
+END:DAYLIGHT
+BEGIN:DAYLIGHT
+TZNAME:CPT
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0500
+DTSTART:19450814T180000
+END:DAYLIGHT
+BEGIN:STANDARD
+TZNAME:CST
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0600
+DTSTART:19450930T020000
+RDATE:19510930T020000
+END:STANDARD
+BEGIN:DAYLIGHT
+TZNAME:CDT
+TZOFFSETFROM:-0600
+TZOFFSETTO:-0500
+DTSTART:19510429T020000
+END:DAYLIGHT
+BEGIN:DAYLIGHT
+TZNAME:CDT
+TZOFFSETFROM:-0600
+TZOFFSETTO:-0500
+DTSTART:19540425T020000
+RRULE:FREQ=YEARLY;BYMONTH=4;BYDAY=-1SU;UNTIL=19600424T080000Z
+END:DAYLIGHT
+BEGIN:STANDARD
+TZNAME:CST
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0600
+DTSTART:19540926T020000
+RRULE:FREQ=YEARLY;BYMONTH=9;BYDAY=-1SU;UNTIL=19600925T070000Z
+END:STANDARD
+BEGIN:STANDARD
+TZNAME:EST
+TZOFFSETFROM:-0600
+TZOFFSETTO:-0500
+DTSTART:19610430T020000
+END:STANDARD
 BEGIN:DAYLIGHT
+TZNAME:EDT
 TZOFFSETFROM:-0500
 TZOFFSETTO:-0400
+DTSTART:19690427T020000
+RRULE:FREQ=YEARLY;BYMONTH=4;BYDAY=-1SU;UNTIL=19730429T070000Z
+END:DAYLIGHT
+BEGIN:STANDARD
+TZNAME:EST
+TZOFFSETFROM:-0400
+TZOFFSETTO:-0500
+DTSTART:19691026T020000
+RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU;UNTIL=19731028T060000Z
+END:STANDARD
+BEGIN:DAYLIGHT
+TZNAME:CDT
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0500
+DTSTART:19740106T020000
+END:DAYLIGHT
+BEGIN:STANDARD
+TZNAME:EST
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0500
+DTSTART:19741027T020000
+END:STANDARD
+BEGIN:DAYLIGHT
 TZNAME:EDT
-DTSTART:19700308T020000
-RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0400
+DTSTART:19750223T020000
+RDATE:20060402T020000
 END:DAYLIGHT
 BEGIN:STANDARD
+TZNAME:EST
 TZOFFSETFROM:-0400
 TZOFFSETTO:-0500
+DTSTART:19751026T020000
+RDATE:20061029T020000
+END:STANDARD
+BEGIN:DAYLIGHT
+TZNAME:EDT
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0400
+DTSTART:20070311T020000
+RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU
+END:DAYLIGHT
+BEGIN:STANDARD
 TZNAME:EST
-DTSTART:19701101T020000
+TZOFFSETFROM:-0400
+TZOFFSETTO:-0500
+DTSTART:20071104T020000
 RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU
 END:STANDARD
 END:VTIMEZONE
diff --git a/zoneinfo/America/Indiana/Petersburg.ics b/zoneinfo/America/Indiana/Petersburg.ics
index b278c695..07dfcc16 100644
--- a/zoneinfo/America/Indiana/Petersburg.ics
+++ b/zoneinfo/America/Indiana/Petersburg.ics
@@ -2,20 +2,132 @@ BEGIN:VCALENDAR
 PRODID:-//citadel.org//NONSGML Citadel calendar//EN
 VERSION:2.0
 BEGIN:VTIMEZONE
-TZID:/citadel.org/20110318_2/America/Indiana/Petersburg
+TZID:/citadel.org/20170826_1/America/Indiana/Petersburg
+LAST-MODIFIED:20170826T195802Z
 X-LIC-LOCATION:America/Indiana/Petersburg
+X-PROLEPTIC-TZNAME:LMT
+BEGIN:STANDARD
+TZNAME:CST
+TZOFFSETFROM:-054907
+TZOFFSETTO:-0600
+DTSTART:18831118T121053
+END:STANDARD
 BEGIN:DAYLIGHT
+TZNAME:CDT
+TZOFFSETFROM:-0600
+TZOFFSETTO:-0500
+DTSTART:19180331T020000
+RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU;UNTIL=19190330T080000Z
+END:DAYLIGHT
+BEGIN:STANDARD
+TZNAME:CST
 TZOFFSETFROM:-0500
-TZOFFSETTO:-0400
+TZOFFSETTO:-0600
+DTSTART:19181027T020000
+RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU;UNTIL=19191026T070000Z
+END:STANDARD
+BEGIN:DAYLIGHT
+TZNAME:CWT
+TZOFFSETFROM:-0600
+TZOFFSETTO:-0500
+DTSTART:19420209T020000
+END:DAYLIGHT
+BEGIN:DAYLIGHT
+TZNAME:CPT
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0500
+DTSTART:19450814T180000
+END:DAYLIGHT
+BEGIN:STANDARD
+TZNAME:CST
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0600
+DTSTART:19450930T020000
+RDATE:19661030T020000
+RDATE:20061029T020000
+END:STANDARD
+BEGIN:DAYLIGHT
+TZNAME:CDT
+TZOFFSETFROM:-0600
+TZOFFSETTO:-0500
+DTSTART:19550501T000000
+RDATE:19740106T020000
+RDATE:19750223T020000
+RDATE:20070311T020000
+END:DAYLIGHT
+BEGIN:STANDARD
+TZNAME:CST
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0600
+DTSTART:19550925T020000
+RRULE:FREQ=YEARLY;BYMONTH=9;BYDAY=-1SU;UNTIL=19600925T070000Z
+END:STANDARD
+BEGIN:DAYLIGHT
+TZNAME:CDT
+TZOFFSETFROM:-0600
+TZOFFSETTO:-0500
+DTSTART:19560429T020000
+RRULE:FREQ=YEARLY;BYMONTH=4;BYDAY=-1SU;UNTIL=19640426T080000Z
+END:DAYLIGHT
+BEGIN:STANDARD
+TZNAME:CST
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0600
+DTSTART:19611029T020000
+RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU;UNTIL=19641025T070000Z
+END:STANDARD
+BEGIN:STANDARD
+TZNAME:EST
+TZOFFSETFROM:-0600
+TZOFFSETTO:-0500
+DTSTART:19650425T020000
+END:STANDARD
+BEGIN:DAYLIGHT
+TZNAME:CDT
+TZOFFSETFROM:-0600
+TZOFFSETTO:-0500
+DTSTART:19670430T020000
+RRULE:FREQ=YEARLY;BYMONTH=4;BYDAY=-1SU;UNTIL=19730429T080000Z
+END:DAYLIGHT
+BEGIN:STANDARD
+TZNAME:CST
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0600
+DTSTART:19671029T020000
+RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU;UNTIL=19761031T070000Z
+END:STANDARD
+BEGIN:DAYLIGHT
+TZNAME:CDT
+TZOFFSETFROM:-0600
+TZOFFSETTO:-0500
+DTSTART:19760425T020000
+RRULE:FREQ=YEARLY;BYMONTH=4;BYDAY=-1SU;UNTIL=19770424T080000Z
+END:DAYLIGHT
+BEGIN:STANDARD
+TZNAME:EST
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0500
+DTSTART:19771030T020000
+RDATE:20071104T020000
+END:STANDARD
+BEGIN:DAYLIGHT
+TZNAME:CDT
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0500
+DTSTART:20060402T020000
+END:DAYLIGHT
+BEGIN:DAYLIGHT
 TZNAME:EDT
-DTSTART:19700308T020000
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0400
+DTSTART:20080309T020000
 RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU
 END:DAYLIGHT
 BEGIN:STANDARD
+TZNAME:EST
 TZOFFSETFROM:-0400
 TZOFFSETTO:-0500
-TZNAME:EST
-DTSTART:19701101T020000
+DTSTART:20081102T020000
 RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU
 END:STANDARD
 END:VTIMEZONE
diff --git a/zoneinfo/America/Indiana/Tell_City.ics b/zoneinfo/America/Indiana/Tell_City.ics
index 1fa6710c..e9efec4e 100644
--- a/zoneinfo/America/Indiana/Tell_City.ics
+++ b/zoneinfo/America/Indiana/Tell_City.ics
@@ -2,20 +2,130 @@ BEGIN:VCALENDAR
 PRODID:-//citadel.org//NONSGML Citadel calendar//EN
 VERSION:2.0
 BEGIN:VTIMEZONE
-TZID:/citadel.org/20110318_1/America/Indiana/Tell_City
+TZID:/citadel.org/20170826_1/America/Indiana/Tell_City
+LAST-MODIFIED:20170826T195802Z
 X-LIC-LOCATION:America/Indiana/Tell_City
+X-PROLEPTIC-TZNAME:LMT
+BEGIN:STANDARD
+TZNAME:CST
+TZOFFSETFROM:-054703
+TZOFFSETTO:-0600
+DTSTART:18831118T121257
+END:STANDARD
 BEGIN:DAYLIGHT
+TZNAME:CDT
 TZOFFSETFROM:-0600
 TZOFFSETTO:-0500
+DTSTART:19180331T020000
+RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU;UNTIL=19190330T080000Z
+END:DAYLIGHT
+BEGIN:STANDARD
+TZNAME:CST
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0600
+DTSTART:19181027T020000
+RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU;UNTIL=19191026T070000Z
+END:STANDARD
+BEGIN:DAYLIGHT
+TZNAME:CWT
+TZOFFSETFROM:-0600
+TZOFFSETTO:-0500
+DTSTART:19420209T020000
+END:DAYLIGHT
+BEGIN:DAYLIGHT
+TZNAME:CPT
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0500
+DTSTART:19450814T180000
+END:DAYLIGHT
+BEGIN:STANDARD
+TZNAME:CST
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0600
+DTSTART:19450930T020000
+RRULE:FREQ=YEARLY;BYMONTH=9;BYDAY=-1SU;UNTIL=19460929T070000Z
+END:STANDARD
+BEGIN:DAYLIGHT
 TZNAME:CDT
-DTSTART:19700308T020000
-RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU
+TZOFFSETFROM:-0600
+TZOFFSETTO:-0500
+DTSTART:19460428T020000
+RDATE:19550501T000000
+END:DAYLIGHT
+BEGIN:DAYLIGHT
+TZNAME:CDT
+TZOFFSETFROM:-0600
+TZOFFSETTO:-0500
+DTSTART:19530426T020000
+RRULE:FREQ=YEARLY;BYMONTH=4;BYDAY=-1SU;UNTIL=19540425T080000Z
+END:DAYLIGHT
+BEGIN:STANDARD
+TZNAME:CST
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0600
+DTSTART:19530927T020000
+RRULE:FREQ=YEARLY;BYMONTH=9;BYDAY=-1SU;UNTIL=19590927T070000Z
+END:STANDARD
+BEGIN:DAYLIGHT
+TZNAME:CDT
+TZOFFSETFROM:-0600
+TZOFFSETTO:-0500
+DTSTART:19560429T020000
+RRULE:FREQ=YEARLY;BYMONTH=4;BYDAY=-1SU;UNTIL=19630428T080000Z
 END:DAYLIGHT
 BEGIN:STANDARD
+TZNAME:CST
 TZOFFSETFROM:-0500
 TZOFFSETTO:-0600
+DTSTART:19601030T020000
+RDATE:19610924T020000
+RDATE:20061029T020000
+END:STANDARD
+BEGIN:STANDARD
 TZNAME:CST
-DTSTART:19701101T020000
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0600
+DTSTART:19621028T020000
+RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU;UNTIL=19631027T070000Z
+END:STANDARD
+BEGIN:STANDARD
+TZNAME:EST
+TZOFFSETFROM:-0600
+TZOFFSETTO:-0500
+DTSTART:19640426T020000
+END:STANDARD
+BEGIN:DAYLIGHT
+TZNAME:EDT
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0400
+DTSTART:19690427T020000
+RRULE:FREQ=YEARLY;BYMONTH=4;BYDAY=-1SU;UNTIL=19700426T070000Z
+END:DAYLIGHT
+BEGIN:STANDARD
+TZNAME:EST
+TZOFFSETFROM:-0400
+TZOFFSETTO:-0500
+DTSTART:19691026T020000
+RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU;UNTIL=19701025T060000Z
+END:STANDARD
+BEGIN:DAYLIGHT
+TZNAME:CDT
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0500
+DTSTART:20060402T020000
+END:DAYLIGHT
+BEGIN:DAYLIGHT
+TZNAME:CDT
+TZOFFSETFROM:-0600
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