diff --git a/vzic/Makefile b/vzic/Makefile
index a732d0bac..377e6af69 100644
--- a/vzic/Makefile
+++ b/vzic/Makefile
@@ -61,7 +61,7 @@ zoneinfo: vzic
 	mkdir -p tzdata
 	cd tzdata; wget -N http://www.ietf.org/timezones/tzdata-latest.tar.gz
 	cd tzdata; tar xzf tzdata-latest.tar.gz
-	vzic --olson-dir tzdata --pure
+	./vzic --olson-dir tzdata --pure
 
 # Dependencies.
 $(OBJECTS): vzic.h
diff --git a/vzic/README.datatracker b/vzic/README.datatracker
new file mode 100644
index 000000000..33dd8ff97
--- /dev/null
+++ b/vzic/README.datatracker
@@ -0,0 +1,6 @@
+This directory contains an external program, vzic, which generates icalendar
+zone information files from the official tzdata files.  In order to update the
+iCalendar files used by the datatracker for zone information, run 'make zoneinfo'
+in this directory.  This will generate new zoneinfo data by fetching the
+latest tzdata file from ietf.org/timezones/tzdata-latest.tar.gz and running
+vzic to update the .ics files as needed.  
diff --git a/vzic/vzic b/vzic/vzic
index de9ff93b2..e3283dd67 100755
Binary files a/vzic/vzic and b/vzic/vzic differ
diff --git a/vzic/zoneinfo/Africa/Cairo.ics b/vzic/zoneinfo/Africa/Cairo.ics
index 76e4198c4..b25bd0f82 100644
--- a/vzic/zoneinfo/Africa/Cairo.ics
+++ b/vzic/zoneinfo/Africa/Cairo.ics
@@ -5,20 +5,6 @@ BEGIN:VTIMEZONE
 TZID:Africa/Cairo
 X-LIC-LOCATION:Africa/Cairo
 BEGIN:STANDARD
-TZOFFSETFROM:+0300
-TZOFFSETTO:+0200
-TZNAME:EET
-DTSTART:20140925T235959
-RRULE:FREQ=YEARLY;BYMONTH=9;BYDAY=-1TH
-END:STANDARD
-BEGIN:DAYLIGHT
-TZOFFSETFROM:+0300
-TZOFFSETTO:+0300
-TZNAME:EEST
-DTSTART:20230428T010000
-RRULE:FREQ=YEARLY;BYMONTH=4;BYDAY=-1FR
-END:DAYLIGHT
-BEGIN:STANDARD
 TZOFFSETFROM:+020509
 TZOFFSETTO:+0200
 TZNAME:EET
@@ -93,13 +79,6 @@ RDATE:20100430T000000
 RDATE:20100909T235959
 RDATE:20140515T235959
 RDATE:20140731T235959
-RDATE:20150424T000000
-RDATE:20150723T235959
-RDATE:20160429T000000
-RDATE:20160707T235959
-RDATE:20170629T235959
-RDATE:20180614T235959
-RDATE:20190606T235959
 END:DAYLIGHT
 BEGIN:STANDARD
 TZOFFSETFROM:+0300
@@ -168,23 +147,7 @@ RDATE:20090820T235959
 RDATE:20100810T235959
 RDATE:20100930T235959
 RDATE:20140626T235959
-RDATE:20150611T235959
-RDATE:20160602T235959
-RDATE:20170525T235959
-RDATE:20180510T235959
-RDATE:20190502T235959
+RDATE:20140925T235959
 END:STANDARD
-BEGIN:DAYLIGHT
-TZOFFSETFROM:+0300
-TZOFFSETTO:+0300
-TZNAME:EEST
-DTSTART:20170428T010000
-RDATE:20170428T010000
-RDATE:20180427T010000
-RDATE:20190426T010000
-RDATE:20200528T235959
-RDATE:20210513T235959
-RDATE:20220505T235959
-END:DAYLIGHT
 END:VTIMEZONE
 END:VCALENDAR
diff --git a/vzic/zoneinfo/Africa/Casablanca.ics b/vzic/zoneinfo/Africa/Casablanca.ics
index 10c336ae8..7c4b6b55a 100644
--- a/vzic/zoneinfo/Africa/Casablanca.ics
+++ b/vzic/zoneinfo/Africa/Casablanca.ics
@@ -49,15 +49,14 @@ RDATE:20130810T020000
 RDATE:20140330T020000
 RDATE:20140802T020000
 RDATE:20150329T020000
-RDATE:20150718T020000
+RDATE:20150719T020000
 RDATE:20160327T020000
-RDATE:20160709T020000
-RDATE:20170701T020000
-RDATE:20180616T020000
-RDATE:20190608T020000
-RDATE:20200530T020000
-RDATE:20210515T020000
-RDATE:20220507T020000
+RDATE:20160710T020000
+RDATE:20170702T020000
+RDATE:20180617T020000
+RDATE:20190609T020000
+RDATE:20200524T020000
+RDATE:20210516T020000
 END:DAYLIGHT
 BEGIN:STANDARD
 TZOFFSETFROM:+0100
@@ -81,15 +80,14 @@ RDATE:20120720T030000
 RDATE:20120930T030000
 RDATE:20130707T030000
 RDATE:20140628T030000
-RDATE:20150613T030000
-RDATE:20160604T030000
-RDATE:20170520T030000
-RDATE:20180512T030000
-RDATE:20190504T030000
-RDATE:20200418T030000
-RDATE:20210410T030000
-RDATE:20220402T030000
-RDATE:20351027T030000
+RDATE:20150614T030000
+RDATE:20160605T030000
+RDATE:20170521T030000
+RDATE:20180513T030000
+RDATE:20190505T030000
+RDATE:20200419T030000
+RDATE:20210411T030000
+RDATE:20361019T030000
 END:STANDARD
 BEGIN:STANDARD
 TZOFFSETFROM:+0000
@@ -108,18 +106,17 @@ RDATE:20180325T020000
 RDATE:20190331T020000
 RDATE:20200329T020000
 RDATE:20210328T020000
-RDATE:20220327T020000
-RDATE:20230422T020000
-RDATE:20240413T020000
-RDATE:20250405T020000
+RDATE:20220508T020000
+RDATE:20230423T020000
+RDATE:20240414T020000
+RDATE:20250406T020000
 END:DAYLIGHT
 BEGIN:STANDARD
 TZOFFSETFROM:+0000
 TZOFFSETTO:+0000
 TZNAME:WET
-DTSTART:20361018T030000
-RDATE:20361018T030000
-RDATE:20371010T030000
+DTSTART:20371004T030000
+RDATE:20371004T030000
 END:STANDARD
 END:VTIMEZONE
 END:VCALENDAR
diff --git a/vzic/zoneinfo/Africa/El_Aaiun.ics b/vzic/zoneinfo/Africa/El_Aaiun.ics
index b8f20c425..3b63baf6c 100644
--- a/vzic/zoneinfo/Africa/El_Aaiun.ics
+++ b/vzic/zoneinfo/Africa/El_Aaiun.ics
@@ -51,15 +51,14 @@ RDATE:20130810T020000
 RDATE:20140330T020000
 RDATE:20140802T020000
 RDATE:20150329T020000
-RDATE:20150718T020000
+RDATE:20150719T020000
 RDATE:20160327T020000
-RDATE:20160709T020000
-RDATE:20170701T020000
-RDATE:20180616T020000
-RDATE:20190608T020000
-RDATE:20200530T020000
-RDATE:20210515T020000
-RDATE:20220507T020000
+RDATE:20160710T020000
+RDATE:20170702T020000
+RDATE:20180617T020000
+RDATE:20190609T020000
+RDATE:20200524T020000
+RDATE:20210516T020000
 END:DAYLIGHT
 BEGIN:STANDARD
 TZOFFSETFROM:+0100
@@ -77,15 +76,14 @@ RDATE:20120720T030000
 RDATE:20120930T030000
 RDATE:20130707T030000
 RDATE:20140628T030000
-RDATE:20150613T030000
-RDATE:20160604T030000
-RDATE:20170520T030000
-RDATE:20180512T030000
-RDATE:20190504T030000
-RDATE:20200418T030000
-RDATE:20210410T030000
-RDATE:20220402T030000
-RDATE:20351027T030000
+RDATE:20150614T030000
+RDATE:20160605T030000
+RDATE:20170521T030000
+RDATE:20180513T030000
+RDATE:20190505T030000
+RDATE:20200419T030000
+RDATE:20210411T030000
+RDATE:20361019T030000
 END:STANDARD
 BEGIN:DAYLIGHT
 TZOFFSETFROM:+0100
@@ -97,18 +95,17 @@ RDATE:20180325T020000
 RDATE:20190331T020000
 RDATE:20200329T020000
 RDATE:20210328T020000
-RDATE:20220327T020000
-RDATE:20230422T020000
-RDATE:20240413T020000
-RDATE:20250405T020000
+RDATE:20220508T020000
+RDATE:20230423T020000
+RDATE:20240414T020000
+RDATE:20250406T020000
 END:DAYLIGHT
 BEGIN:STANDARD
 TZOFFSETFROM:+0000
 TZOFFSETTO:+0000
 TZNAME:WET
-DTSTART:20361018T030000
-RDATE:20361018T030000
-RDATE:20371010T030000
+DTSTART:20371004T030000
+RDATE:20371004T030000
 END:STANDARD
 END:VTIMEZONE
 END:VCALENDAR
diff --git a/vzic/zoneinfo/America/Adak.ics b/vzic/zoneinfo/America/Adak.ics
index bec64291b..307b437ea 100644
--- a/vzic/zoneinfo/America/Adak.ics
+++ b/vzic/zoneinfo/America/Adak.ics
@@ -7,14 +7,14 @@ X-LIC-LOCATION:America/Adak
 BEGIN:DAYLIGHT
 TZOFFSETFROM:-1000
 TZOFFSETTO:-0900
-TZNAME:HADT
+TZNAME:HDT
 DTSTART:20070311T020000
 RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU
 END:DAYLIGHT
 BEGIN:STANDARD
 TZOFFSETFROM:-0900
 TZOFFSETTO:-1000
-TZNAME:HAST
+TZNAME:HST
 DTSTART:20071104T020000
 RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU
 END:STANDARD
@@ -120,14 +120,14 @@ END:STANDARD
 BEGIN:STANDARD
 TZOFFSETFROM:-1000
 TZOFFSETTO:-1000
-TZNAME:HAST
+TZNAME:HST
 DTSTART:19831130T000000
 RDATE:19831130T000000
 END:STANDARD
 BEGIN:DAYLIGHT
 TZOFFSETFROM:-1000
 TZOFFSETTO:-0900
-TZNAME:HADT
+TZNAME:HDT
 DTSTART:19840429T020000
 RDATE:19840429T020000
 RDATE:19850428T020000
@@ -156,7 +156,7 @@ END:DAYLIGHT
 BEGIN:STANDARD
 TZOFFSETFROM:-0900
 TZOFFSETTO:-1000
-TZNAME:HAST
+TZNAME:HST
 DTSTART:19841028T020000
 RDATE:19841028T020000
 RDATE:19851027T020000
diff --git a/vzic/zoneinfo/America/Campo_Grande.ics b/vzic/zoneinfo/America/Campo_Grande.ics
index eb877747b..5c15db128 100644
--- a/vzic/zoneinfo/America/Campo_Grande.ics
+++ b/vzic/zoneinfo/America/Campo_Grande.ics
@@ -114,13 +114,13 @@ RDATE:20150222T000000
 RDATE:20160221T000000
 RDATE:20170219T000000
 RDATE:20180218T000000
+RDATE:20190217T000000
 END:STANDARD
 BEGIN:STANDARD
 TZOFFSETFROM:-0400
 TZOFFSETTO:-0400
 TZNAME:AMT
-DTSTART:20190217T000000
-RDATE:20190217T000000
+DTSTART:20200216T000000
 RDATE:20200216T000000
 RDATE:20210221T000000
 RDATE:20220220T000000
diff --git a/vzic/zoneinfo/America/Caracas.ics b/vzic/zoneinfo/America/Caracas.ics
index afc6a4d3c..d64790205 100644
--- a/vzic/zoneinfo/America/Caracas.ics
+++ b/vzic/zoneinfo/America/Caracas.ics
@@ -24,6 +24,7 @@ TZOFFSETTO:-0400
 TZNAME:VET
 DTSTART:19650101T000000
 RDATE:19650101T000000
+RDATE:20160501T023000
 END:STANDARD
 BEGIN:STANDARD
 TZOFFSETFROM:-0400
diff --git a/vzic/zoneinfo/America/Cuiaba.ics b/vzic/zoneinfo/America/Cuiaba.ics
index 90ac07baf..4f6ed31e0 100644
--- a/vzic/zoneinfo/America/Cuiaba.ics
+++ b/vzic/zoneinfo/America/Cuiaba.ics
@@ -112,6 +112,7 @@ RDATE:20150222T000000
 RDATE:20160221T000000
 RDATE:20170219T000000
 RDATE:20180218T000000
+RDATE:20190217T000000
 END:STANDARD
 BEGIN:STANDARD
 TZOFFSETFROM:-0400
@@ -120,7 +121,6 @@ TZNAME:AMT
 DTSTART:20030924T000000
 RDATE:20030924T000000
 RDATE:20041001T000000
-RDATE:20190217T000000
 RDATE:20200216T000000
 RDATE:20210221T000000
 RDATE:20220220T000000
diff --git a/vzic/zoneinfo/America/Fort_Nelson.ics b/vzic/zoneinfo/America/Fort_Nelson.ics
new file mode 100644
index 000000000..dba986a90
--- /dev/null
+++ b/vzic/zoneinfo/America/Fort_Nelson.ics
@@ -0,0 +1,196 @@
+BEGIN:VCALENDAR
+PRODID:-//IETF Tools//NONSGML ietf-agenda-ical 1.03//EN
+VERSION:2.0
+BEGIN:VTIMEZONE
+TZID:America/Fort_Nelson
+X-LIC-LOCATION:America/Fort_Nelson
+BEGIN:STANDARD
+TZOFFSETFROM:-081047
+TZOFFSETTO:-0800
+TZNAME:PST
+DTSTART:18840101T000000
+RDATE:18840101T000000
+END:STANDARD
+BEGIN:DAYLIGHT
+TZOFFSETFROM:-0800
+TZOFFSETTO:-0700
+TZNAME:PDT
+DTSTART:19180414T020000
+RDATE:19180414T020000
+RDATE:19470427T020000
+RDATE:19480425T020000
+RDATE:19490424T020000
+RDATE:19500430T020000
+RDATE:19510429T020000
+RDATE:19520427T020000
+RDATE:19530426T020000
+RDATE:19540425T020000
+RDATE:19550424T020000
+RDATE:19560429T020000
+RDATE:19570428T020000
+RDATE:19580427T020000
+RDATE:19590426T020000
+RDATE:19600424T020000
+RDATE:19610430T020000
+RDATE:19620429T020000
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+RDATE:19660424T020000
+RDATE:19670430T020000
+RDATE:19680428T020000
+RDATE:19690427T020000
+RDATE:19700426T020000
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+RDATE:20120311T020000
+RDATE:20130310T020000
+RDATE:20140309T020000
+END:DAYLIGHT
+BEGIN:STANDARD
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+TZOFFSETTO:-0800
+TZNAME:PST
+DTSTART:19181027T020000
+RDATE:19181027T020000
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+RDATE:19921025T020000
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+RDATE:19941030T020000
+RDATE:19951029T020000
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+RDATE:19971026T020000
+RDATE:19981025T020000
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+RDATE:20021027T020000
+RDATE:20031026T020000
+RDATE:20041031T020000
+RDATE:20051030T020000
+RDATE:20061029T020000
+RDATE:20071104T020000
+RDATE:20081102T020000
+RDATE:20091101T020000
+RDATE:20101107T020000
+RDATE:20111106T020000
+RDATE:20121104T020000
+RDATE:20131103T020000
+RDATE:20141102T020000
+END:STANDARD
+BEGIN:DAYLIGHT
+TZOFFSETFROM:-0800
+TZOFFSETTO:-0700
+TZNAME:PWT
+DTSTART:19420209T020000
+RDATE:19420209T020000
+END:DAYLIGHT
+BEGIN:DAYLIGHT
+TZOFFSETFROM:-0700
+TZOFFSETTO:-0700
+TZNAME:PPT
+DTSTART:19450814T160000
+RDATE:19450814T160000
+END:DAYLIGHT
+BEGIN:STANDARD
+TZOFFSETFROM:-0800
+TZOFFSETTO:-0800
+TZNAME:PST
+DTSTART:19460101T000000
+RDATE:19460101T000000
+RDATE:19470101T000000
+RDATE:19870101T000000
+END:STANDARD
+BEGIN:STANDARD
+TZOFFSETFROM:-0800
+TZOFFSETTO:-0700
+TZNAME:MST
+DTSTART:20150308T020000
+RDATE:20150308T020000
+END:STANDARD
+END:VTIMEZONE
+END:VCALENDAR
diff --git a/vzic/zoneinfo/America/Metlakatla.ics b/vzic/zoneinfo/America/Metlakatla.ics
index 24c2afb3b..c37e39ef4 100644
--- a/vzic/zoneinfo/America/Metlakatla.ics
+++ b/vzic/zoneinfo/America/Metlakatla.ics
@@ -5,6 +5,20 @@ BEGIN:VTIMEZONE
 TZID:America/Metlakatla
 X-LIC-LOCATION:America/Metlakatla
 BEGIN:STANDARD
+TZOFFSETFROM:-0800
+TZOFFSETTO:-0900
+TZNAME:AKST
+DTSTART:20151101T020000
+RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU
+END:STANDARD
+BEGIN:DAYLIGHT
+TZOFFSETFROM:-0900
+TZOFFSETTO:-0800
+TZNAME:AKDT
+DTSTART:20160313T020000
+RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU
+END:DAYLIGHT
+BEGIN:STANDARD
 TZOFFSETFROM:+151342
 TZOFFSETTO:-084618
 TZNAME:LMT
diff --git a/vzic/zoneinfo/America/Montevideo.ics b/vzic/zoneinfo/America/Montevideo.ics
index d95e614ab..090f26493 100644
--- a/vzic/zoneinfo/America/Montevideo.ics
+++ b/vzic/zoneinfo/America/Montevideo.ics
@@ -4,20 +4,6 @@ VERSION:2.0
 BEGIN:VTIMEZONE
 TZID:America/Montevideo
 X-LIC-LOCATION:America/Montevideo
-BEGIN:DAYLIGHT
-TZOFFSETFROM:-0300
-TZOFFSETTO:-0200
-TZNAME:UYST
-DTSTART:20061001T020000
-RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=1SU
-END:DAYLIGHT
-BEGIN:STANDARD
-TZOFFSETFROM:-0200
-TZOFFSETTO:-0300
-TZNAME:UYT
-DTSTART:20070311T020000
-RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU
-END:STANDARD
 BEGIN:STANDARD
 TZOFFSETFROM:-034444
 TZOFFSETTO:-034444
@@ -98,6 +84,15 @@ RDATE:19920301T000000
 RDATE:19930228T000000
 RDATE:20050327T020000
 RDATE:20060312T020000
+RDATE:20070311T020000
+RDATE:20080309T020000
+RDATE:20090308T020000
+RDATE:20100314T020000
+RDATE:20110313T020000
+RDATE:20120311T020000
+RDATE:20130310T020000
+RDATE:20140309T020000
+RDATE:20150308T020000
 END:STANDARD
 BEGIN:DAYLIGHT
 TZOFFSETFROM:-0300
@@ -120,6 +115,15 @@ RDATE:19911027T000000
 RDATE:19921018T000000
 RDATE:20040919T000000
 RDATE:20051009T020000
+RDATE:20061001T020000
+RDATE:20071007T020000
+RDATE:20081005T020000
+RDATE:20091004T020000
+RDATE:20101003T020000
+RDATE:20111002T020000
+RDATE:20121007T020000
+RDATE:20131006T020000
+RDATE:20141005T020000
 END:DAYLIGHT
 BEGIN:DAYLIGHT
 TZOFFSETFROM:-0300
diff --git a/vzic/zoneinfo/America/Port-au-Prince.ics b/vzic/zoneinfo/America/Port-au-Prince.ics
index d04f177df..41b7c524c 100644
--- a/vzic/zoneinfo/America/Port-au-Prince.ics
+++ b/vzic/zoneinfo/America/Port-au-Prince.ics
@@ -4,20 +4,6 @@ VERSION:2.0
 BEGIN:VTIMEZONE
 TZID:America/Port-au-Prince
 X-LIC-LOCATION:America/Port-au-Prince
-BEGIN:DAYLIGHT
-TZOFFSETFROM:-0500
-TZOFFSETTO:-0400
-TZNAME:EDT
-DTSTART:20120311T020000
-RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU
-END:DAYLIGHT
-BEGIN:STANDARD
-TZOFFSETFROM:-0400
-TZOFFSETTO:-0500
-TZNAME:EST
-DTSTART:20121104T020000
-RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU
-END:STANDARD
 BEGIN:STANDARD
 TZOFFSETFROM:-044920
 TZOFFSETTO:-0449
@@ -54,6 +40,10 @@ RDATE:19960407T010000
 RDATE:19970406T010000
 RDATE:20050403T000000
 RDATE:20060402T000000
+RDATE:20120311T020000
+RDATE:20130310T020000
+RDATE:20140309T020000
+RDATE:20150308T020000
 END:DAYLIGHT
 BEGIN:STANDARD
 TZOFFSETFROM:-0400
@@ -77,6 +67,10 @@ RDATE:19961027T020000
 RDATE:19971026T020000
 RDATE:20051030T000000
 RDATE:20061029T000000
+RDATE:20121104T020000
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index 030453ff3..900e2862a 100644
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index 754614072..c2a8481f5 100644
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index 28288199d..421e1899c 100644
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index ce8cbc0a7..07d322337 100644
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new file mode 100644
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index 0558a472f..720f3fb28 100644
--- a/vzic/zoneinfo/Europe/Minsk.ics
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index 2de25d050..d4e443bdd 100644
--- a/vzic/zoneinfo/Europe/Moscow.ics
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index 35b4787a9..b8434d818 100644
--- a/vzic/zoneinfo/Europe/Samara.ics
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--- a/vzic/zoneinfo/Europe/Simferopol.ics
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index be844415f..74d3442c4 100644
--- a/vzic/zoneinfo/Europe/Sofia.ics
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index 5fd58adb8..a86195b69 100644
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new file mode 100644
index 000000000..57881a0f3
--- /dev/null
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@@ -0,0 +1,134 @@
+BEGIN:VCALENDAR
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diff --git a/vzic/zoneinfo/Europe/Vilnius.ics b/vzic/zoneinfo/Europe/Vilnius.ics
index 47884cc26..e6fb88105 100644
--- a/vzic/zoneinfo/Europe/Vilnius.ics
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diff --git a/vzic/zoneinfo/Europe/Volgograd.ics b/vzic/zoneinfo/Europe/Volgograd.ics
index 133a61634..ec657d27d 100644
--- a/vzic/zoneinfo/Europe/Volgograd.ics
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new file mode 100644
index 000000000..c185a3f71
--- /dev/null
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@@ -0,0 +1,43 @@
+BEGIN:VCALENDAR
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index ddf2d07af..b0ee86b77 100644
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index 5460a6e6d..16cd2e8d3 100644
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diff --git a/vzic/zoneinfo/Pacific/Norfolk.ics b/vzic/zoneinfo/Pacific/Norfolk.ics
index b1db4b351..d09dcfc2f 100644
--- a/vzic/zoneinfo/Pacific/Norfolk.ics
+++ b/vzic/zoneinfo/Pacific/Norfolk.ics
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index 554ba950f..111a98331 100644
--- a/vzic/zoneinfo/zones.h
+++ b/vzic/zoneinfo/zones.h
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 N_("Africa/Windhoek");
 N_("America/Adak");
 N_("America/Anchorage");
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 N_("America/Argentina/Buenos_Aires");
 N_("America/Argentina/Catamarca");
@@ -48,7 +47,6 @@ N_("America/Campo_Grande");
 N_("America/Cancun");
 N_("America/Caracas");
 N_("America/Cayenne");
-N_("America/Cayman");
 N_("America/Chicago");
 N_("America/Chihuahua");
 N_("America/Costa_Rica");
@@ -63,6 +61,7 @@ N_("America/Detroit");
 N_("America/Edmonton");
 N_("America/Eirunepe");
 N_("America/El_Salvador");
+N_("America/Fort_Nelson");
 N_("America/Fortaleza");
 N_("America/Glace_Bay");
 N_("America/Godthab");
@@ -105,7 +104,6 @@ N_("America/Miquelon");
 N_("America/Moncton");
 N_("America/Monterrey");
 N_("America/Montevideo");
-N_("America/Montreal");
 N_("America/Nassau");
 N_("America/New_York");
 N_("America/Nipigon");
@@ -129,7 +127,6 @@ N_("America/Recife");
 N_("America/Regina");
 N_("America/Resolute");
 N_("America/Rio_Branco");
-N_("America/Santa_Isabel");
 N_("America/Santarem");
 N_("America/Santiago");
 N_("America/Santo_Domingo");
@@ -167,6 +164,7 @@ N_("Asia/Ashgabat");
 N_("Asia/Baghdad");
 N_("Asia/Baku");
 N_("Asia/Bangkok");
+N_("Asia/Barnaul");
 N_("Asia/Beirut");
 N_("Asia/Bishkek");
 N_("Asia/Brunei");
@@ -223,6 +221,7 @@ N_("Asia/Tbilisi");
 N_("Asia/Tehran");
 N_("Asia/Thimphu");
 N_("Asia/Tokyo");
+N_("Asia/Tomsk");
 N_("Asia/Ulaanbaatar");
 N_("Asia/Urumqi");
 N_("Asia/Ust-Nera");
@@ -253,6 +252,7 @@ N_("Australia/Perth");
 N_("Australia/Sydney");
 N_("Europe/Amsterdam");
 N_("Europe/Andorra");
+N_("Europe/Astrakhan");
 N_("Europe/Athens");
 N_("Europe/Belgrade");
 N_("Europe/Berlin");
@@ -267,6 +267,7 @@ N_("Europe/Helsinki");
 N_("Europe/Istanbul");
 N_("Europe/Kaliningrad");
 N_("Europe/Kiev");
+N_("Europe/Kirov");
 N_("Europe/Lisbon");
 N_("Europe/London");
 N_("Europe/Luxembourg");
@@ -286,6 +287,7 @@ N_("Europe/Sofia");
 N_("Europe/Stockholm");
 N_("Europe/Tallinn");
 N_("Europe/Tirane");
+N_("Europe/Ulyanovsk");
 N_("Europe/Uzhgorod");
 N_("Europe/Vienna");
 N_("Europe/Vilnius");
@@ -322,7 +324,6 @@ N_("Pacific/Kosrae");
 N_("Pacific/Kwajalein");
 N_("Pacific/Majuro");
 N_("Pacific/Marquesas");
-N_("Pacific/Midway");
 N_("Pacific/Nauru");
 N_("Pacific/Niue");
 N_("Pacific/Norfolk");
@@ -333,7 +334,6 @@ N_("Pacific/Pitcairn");
 N_("Pacific/Pohnpei");
 N_("Pacific/Port_Moresby");
 N_("Pacific/Rarotonga");
-N_("Pacific/Saipan");
 N_("Pacific/Tahiti");
 N_("Pacific/Tarawa");
 N_("Pacific/Tongatapu");
diff --git a/vzic/zoneinfo/zones.tab b/vzic/zoneinfo/zones.tab
index c722e0e70..94950cd78 100644
--- a/vzic/zoneinfo/zones.tab
+++ b/vzic/zoneinfo/zones.tab
@@ -18,7 +18,6 @@
 -0223400 +0170600 Africa/Windhoek
 +0515248 -1763929 America/Adak
 +0611305 -1495401 America/Anchorage
-+0170300 -0614800 America/Antigua
 -0071200 -0481200 America/Araguaina
 -0343600 -0582700 America/Argentina/Buenos_Aires
 -0282800 -0654700 America/Argentina/Catamarca
@@ -48,7 +47,6 @@
 +0210500 -0864600 America/Cancun
 +0103000 -0665600 America/Caracas
 +0045600 -0522000 America/Cayenne
-+0191800 -0812300 America/Cayman
 +0415100 -0873900 America/Chicago
 +0283800 -1060500 America/Chihuahua
 +0095600 -0840500 America/Costa_Rica
@@ -63,6 +61,7 @@
 +0533300 -1132800 America/Edmonton
 -0064000 -0695200 America/Eirunepe
 +0134200 -0891200 America/El_Salvador
++0584800 -1224200 America/Fort_Nelson
 -0034300 -0383000 America/Fortaleza
 +0461200 -0595700 America/Glace_Bay
 +0641100 -0514400 America/Godthab
@@ -105,7 +104,6 @@
 +0460600 -0644700 America/Moncton
 +0254000 -1001900 America/Monterrey
 -0345300 -0561100 America/Montevideo
-America/Montreal
 +0250500 -0772100 America/Nassau
 +0404251 -0740023 America/New_York
 +0490100 -0881600 America/Nipigon
@@ -129,7 +127,6 @@ America/Montreal
 +0502400 -1043900 America/Regina
 +0744144 -0944945 America/Resolute
 -0095800 -0674800 America/Rio_Branco
-+0301800 -1145200 America/Santa_Isabel
 -0022600 -0545200 America/Santarem
 -0332700 -0704000 America/Santiago
 +0182800 -0695400 America/Santo_Domingo
@@ -167,6 +164,7 @@ America/Montreal
 +0332100 +0442500 Asia/Baghdad
 +0402300 +0495100 Asia/Baku
 +0134500 +1003100 Asia/Bangkok
++0532200 +0834500 Asia/Barnaul
 +0335300 +0353000 Asia/Beirut
 +0425400 +0743600 Asia/Bishkek
 +0045600 +1145500 Asia/Brunei
@@ -223,6 +221,7 @@ America/Montreal
 +0354000 +0512600 Asia/Tehran
 +0272800 +0893900 Asia/Thimphu
 +0353916 +1394441 Asia/Tokyo
++0563000 +0845800 Asia/Tomsk
 +0475500 +1065300 Asia/Ulaanbaatar
 +0434800 +0873500 Asia/Urumqi
 +0643337 +1431336 Asia/Ust-Nera
@@ -253,6 +252,7 @@ America/Montreal
 -0335200 +1511300 Australia/Sydney
 +0522200 +0045400 Europe/Amsterdam
 +0423000 +0013100 Europe/Andorra
++0462100 +0480300 Europe/Astrakhan
 +0375800 +0234300 Europe/Athens
 +0445000 +0203000 Europe/Belgrade
 +0523000 +0132200 Europe/Berlin
@@ -267,6 +267,7 @@ America/Montreal
 +0410100 +0285800 Europe/Istanbul
 +0544300 +0203000 Europe/Kaliningrad
 +0502600 +0303100 Europe/Kiev
++0583600 +0493900 Europe/Kirov
 +0384300 -0090800 Europe/Lisbon
 +0513030 +0000731 Europe/London
 +0493600 +0060900 Europe/Luxembourg
@@ -286,6 +287,7 @@ America/Montreal
 +0592000 +0180300 Europe/Stockholm
 +0592500 +0244500 Europe/Tallinn
 +0412000 +0195000 Europe/Tirane
++0542000 +0482400 Europe/Ulyanovsk
 +0483700 +0221800 Europe/Uzhgorod
 +0481300 +0162000 Europe/Vienna
 +0544100 +0251900 Europe/Vilnius
@@ -322,7 +324,6 @@ America/Montreal
 +0090500 +1672000 Pacific/Kwajalein
 +0070900 +1711200 Pacific/Majuro
 -0090000 -1393000 Pacific/Marquesas
-+0281300 -1772200 Pacific/Midway
 +0003100 +1665500 Pacific/Nauru
 -0190100 -1695500 Pacific/Niue
 -0290300 +1675800 Pacific/Norfolk
@@ -333,7 +334,6 @@ America/Montreal
 +0065800 +1581300 Pacific/Pohnpei
 -0093000 +1471000 Pacific/Port_Moresby
 -0211400 -1594600 Pacific/Rarotonga
-+0151200 +1454500 Pacific/Saipan
 -0173200 -1493400 Pacific/Tahiti
 +0012500 +1730000 Pacific/Tarawa
 -0211000 -1751000 Pacific/Tongatapu