1 files changed, 61 insertions, 4 deletions
diff --git a/zoneinfo/America/Chicago.ics b/zoneinfo/America/Chicago.ics
index 1760af05..151d0ac0 100644
--- a/zoneinfo/America/Chicago.ics
+++ b/zoneinfo/America/Chicago.ics
@@ -2,21 +2,78 @@ BEGIN:VCALENDAR
 PRODID:-//citadel.org//NONSGML Citadel calendar//EN
 VERSION:2.0
 BEGIN:VTIMEZONE
-TZID:/citadel.org/20070227_1/America/Chicago
+TZID:/citadel.org/20171102_1/America/Chicago
+LAST-MODIFIED:20171102T203623Z
 X-LIC-LOCATION:America/Chicago
+X-PROLEPTIC-TZNAME:LMT
+BEGIN:STANDARD
+TZNAME:CST
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0600
+DTSTART:19701101T020000
+RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU
+END:STANDARD
 BEGIN:DAYLIGHT
+TZNAME:CDT
 TZOFFSETFROM:-0600
 TZOFFSETTO:-0500
-TZNAME:CDT
 DTSTART:19700308T020000
 RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU
 END:DAYLIGHT
+BEGIN:DAYLIGHT
+TZNAME:CDT
+TZOFFSETFROM:-0600
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+DTSTART:19700405T020000
+RRULE:FREQ=YEARLY;BYMONTH=4;BYDAY=1SU;UNTIL=20060402T080000Z
+END:DAYLIGHT
+BEGIN:DAYLIGHT
+TZNAME:CDT
+TZOFFSETFROM:-0600
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+DTSTART:19700426T020000
+RRULE:FREQ=YEARLY;BYMONTH=4;BYDAY=-1SU;UNTIL=19860427T080000Z
+END:DAYLIGHT
+BEGIN:STANDARD
+TZNAME:CST
+TZOFFSETFROM:-0500
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+DTSTART:19701025T020000
+RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU;UNTIL=20061029T070000Z
+END:STANDARD
+BEGIN:DAYLIGHT
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+RRULE:FREQ=YEARLY;BYMONTH=4;BYDAY=-1SU;UNTIL=19730429T080000Z
+END:DAYLIGHT
 BEGIN:STANDARD
+TZNAME:CST
 TZOFFSETFROM:-0500
 TZOFFSETTO:-0600
+DTSTART:19700927T020000
+RRULE:FREQ=YEARLY;BYMONTH=9;BYDAY=-1SU;UNTIL=19540926T070000Z
+END:STANDARD
+BEGIN:STANDARD
 TZNAME:CST
-DTSTART:19701101T020000
-RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU
+TZOFFSETFROM:-0500
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+DTSTART:19700927T020000
+RRULE:FREQ=YEARLY;BYMONTH=9;BYDAY=-1SU;UNTIL=19410928T070000Z
+END:STANDARD
+BEGIN:DAYLIGHT
+TZNAME:CDT
+TZOFFSETFROM:-0600
+TZOFFSETTO:-0500
+DTSTART:19700426T020000
+RRULE:FREQ=YEARLY;BYMONTH=4;BYDAY=-1SU;UNTIL=19410427T080000Z
+END:DAYLIGHT
+BEGIN:STANDARD
+TZNAME:CST
+TZOFFSETFROM:-0600
+TZOFFSETTO:-0600
+DTSTART:19700101T000000
 END:STANDARD
 END:VTIMEZONE
 END:VCALENDAR