updated all of the VTIMEZONE files to try to be more compatable with

2001-08-31  Damon Chaplin  <damon@ximian.com>

	* zoneinfo/*: updated all of the VTIMEZONE files to try to be more
	compatable with Outlook. i.e. We don't use seconds in UTC offsets,
	we don't use BYMONTHDAY if we can avoid it (there are still a few uses
	of this we need to fix), and we don't use years < 1600.

	* src/libical/icalvalue.c (icalvalue_utcoffset_as_ical_string): if
	seconds is 0 then don't output it. None of the builtin VTIMEZONE data
	uses the seconds value any more, since it messes up iTIP with Outlook.
	We may want to make it always round to the nearest minute, to avoid
	interop problems.

svn path=/trunk/; revision=12551

51 files changed, 166 insertions, 529 deletions

diff --git a/libical/zoneinfo/Europe/Amsterdam.ics b/libical/zoneinfo/Europe/Amsterdam.ics
index 9d493197cc..96dc8eef52 100644
--- a/libical/zoneinfo/Europe/Amsterdam.ics
+++ b/libical/zoneinfo/Europe/Amsterdam.ics
@@ -2,7 +2,7 @@ BEGIN:VCALENDAR
 PRODID:-//Ximian//NONSGML Evolution Olson-VTIMEZONE Converter//EN
 VERSION:2.0
 BEGIN:VTIMEZONE
-TZID:/softwarestudio.org/Olson_20010626_2/Europe/Amsterdam
+TZID:/softwarestudio.org/Olson_20010831_3/Europe/Amsterdam
 X-LIC-LOCATION:Europe/Amsterdam
 BEGIN:DAYLIGHT
 TZOFFSETFROM:+0100
@@ -19,22 +19,15 @@ DTSTART:19961027T030000
 RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU
 END:STANDARD
 BEGIN:STANDARD
-TZOFFSETFROM:+0000
-TZOFFSETTO:+001932
-TZNAME:LMT
-DTSTART:00010101T000000
-RDATE:00010101T000000
-END:STANDARD
-BEGIN:STANDARD
-TZOFFSETFROM:+001932
-TZOFFSETTO:+001932
+TZOFFSETFROM:+0020
+TZOFFSETTO:+0020
 TZNAME:AMT
 DTSTART:18350101T000000
 RDATE:18350101T000000
 END:STANDARD
 BEGIN:DAYLIGHT
-TZOFFSETFROM:+001932
-TZOFFSETTO:+011932
+TZOFFSETFROM:+0020
+TZOFFSETTO:+0120
 TZNAME:NST
 DTSTART:19160501T000000
 RDATE:19160501T000000
@@ -61,8 +54,8 @@ RDATE:19360515T020000
 RDATE:19370522T020000
 END:DAYLIGHT
 BEGIN:STANDARD
-TZOFFSETFROM:+011932
-TZOFFSETTO:+001932
+TZOFFSETFROM:+0120
+TZOFFSETTO:+0020
 TZNAME:AMT
 DTSTART:19161001T000000
 RDATE:19161001T000000
@@ -88,7 +81,7 @@ RDATE:19351006T030000
 RDATE:19361004T030000
 END:STANDARD
 BEGIN:DAYLIGHT
-TZOFFSETFROM:+011932
+TZOFFSETFROM:+0120
 TZOFFSETTO:+0120
 TZNAME:NEST
 DTSTART:19370701T000000
diff --git a/libical/zoneinfo/Europe/Andorra.ics b/libical/zoneinfo/Europe/Andorra.ics
index 6a6723c6bc..71490c4776 100644
--- a/libical/zoneinfo/Europe/Andorra.ics
+++ b/libical/zoneinfo/Europe/Andorra.ics
@@ -2,7 +2,7 @@ BEGIN:VCALENDAR
 PRODID:-//Ximian//NONSGML Evolution Olson-VTIMEZONE Converter//EN
 VERSION:2.0
 BEGIN:VTIMEZONE
-TZID:/softwarestudio.org/Olson_20010626_2/Europe/Andorra
+TZID:/softwarestudio.org/Olson_20010831_3/Europe/Andorra
 X-LIC-LOCATION:Europe/Andorra
 BEGIN:DAYLIGHT
 TZOFFSETFROM:+0100
@@ -19,14 +19,7 @@ DTSTART:19961027T030000
 RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU
 END:STANDARD
 BEGIN:STANDARD
-TZOFFSETFROM:+0000
-TZOFFSETTO:+000604
-TZNAME:LMT
-DTSTART:00010101T000000
-RDATE:00010101T000000
-END:STANDARD
-BEGIN:STANDARD
-TZOFFSETFROM:+000604
+TZOFFSETFROM:+0006
 TZOFFSETTO:+0000
 TZNAME:WET
 DTSTART:19010101T000000
diff --git a/libical/zoneinfo/Europe/Athens.ics b/libical/zoneinfo/Europe/Athens.ics
index bd011f469b..b02b2c45f6 100644
--- a/libical/zoneinfo/Europe/Athens.ics
+++ b/libical/zoneinfo/Europe/Athens.ics
@@ -2,7 +2,7 @@ BEGIN:VCALENDAR
 PRODID:-//Ximian//NONSGML Evolution Olson-VTIMEZONE Converter//EN
 VERSION:2.0
 BEGIN:VTIMEZONE
-TZID:/softwarestudio.org/Olson_20010626_2/Europe/Athens
+TZID:/softwarestudio.org/Olson_20010831_3/Europe/Athens
 X-LIC-LOCATION:Europe/Athens
 BEGIN:DAYLIGHT
 TZOFFSETFROM:+0200
@@ -19,21 +19,14 @@ DTSTART:19961027T040000
 RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU
 END:STANDARD
 BEGIN:STANDARD
-TZOFFSETFROM:+0000
-TZOFFSETTO:+013452
-TZNAME:LMT
-DTSTART:00010101T000000
-RDATE:00010101T000000
-END:STANDARD
-BEGIN:STANDARD
-TZOFFSETFROM:+013452
-TZOFFSETTO:+013452
+TZOFFSETFROM:+0135
+TZOFFSETTO:+0135
 TZNAME:AMT
 DTSTART:18950914T000000
 RDATE:18950914T000000
 END:STANDARD
 BEGIN:STANDARD
-TZOFFSETFROM:+013452
+TZOFFSETFROM:+0135
 TZOFFSETTO:+0200
 TZNAME:EET
 DTSTART:19160728T000100
diff --git a/libical/zoneinfo/Europe/Belfast.ics b/libical/zoneinfo/Europe/Belfast.ics
index 92273099df..42c2e06ab4 100644
--- a/libical/zoneinfo/Europe/Belfast.ics
+++ b/libical/zoneinfo/Europe/Belfast.ics
@@ -2,7 +2,7 @@ BEGIN:VCALENDAR
 PRODID:-//Ximian//NONSGML Evolution Olson-VTIMEZONE Converter//EN
 VERSION:2.0
 BEGIN:VTIMEZONE
-TZID:/softwarestudio.org/Olson_20010626_2/Europe/Belfast
+TZID:/softwarestudio.org/Olson_20010831_3/Europe/Belfast
 X-LIC-LOCATION:Europe/Belfast
 BEGIN:DAYLIGHT
 TZOFFSETFROM:+0000
@@ -19,28 +19,21 @@ DTSTART:19961027T020000
 RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU
 END:STANDARD
 BEGIN:STANDARD
-TZOFFSETFROM:+0000
-TZOFFSETTO:-002340
-TZNAME:LMT
-DTSTART:00010101T000000
-RDATE:00010101T000000
-END:STANDARD
-BEGIN:STANDARD
-TZOFFSETFROM:-002340
-TZOFFSETTO:-002521
+TZOFFSETFROM:-0024
+TZOFFSETTO:-0025
 TZNAME:DMT
 DTSTART:18800802T000000
 RDATE:18800802T000000
 END:STANDARD
 BEGIN:DAYLIGHT
-TZOFFSETFROM:-002521
-TZOFFSETTO:+003439
+TZOFFSETFROM:-0025
+TZOFFSETTO:+0035
 TZNAME:IST
 DTSTART:19160521T020000
 RDATE:19160521T020000
 END:DAYLIGHT
 BEGIN:STANDARD
-TZOFFSETFROM:+003439
+TZOFFSETFROM:+0035
 TZOFFSETTO:+0000
 TZNAME:GMT
 DTSTART:19161001T030000
diff --git a/libical/zoneinfo/Europe/Belgrade.ics b/libical/zoneinfo/Europe/Belgrade.ics
index 424e9c80b8..b04ec3744f 100644
--- a/libical/zoneinfo/Europe/Belgrade.ics
+++ b/libical/zoneinfo/Europe/Belgrade.ics
@@ -2,7 +2,7 @@ BEGIN:VCALENDAR
 PRODID:-//Ximian//NONSGML Evolution Olson-VTIMEZONE Converter//EN
 VERSION:2.0
 BEGIN:VTIMEZONE
-TZID:/softwarestudio.org/Olson_20010626_2/Europe/Belgrade
+TZID:/softwarestudio.org/Olson_20010831_3/Europe/Belgrade
 X-LIC-LOCATION:Europe/Belgrade
 BEGIN:DAYLIGHT
 TZOFFSETFROM:+0100
@@ -19,13 +19,6 @@ DTSTART:19961027T030000
 RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU
 END:STANDARD
 BEGIN:STANDARD
-TZOFFSETFROM:+0000
-TZOFFSETTO:+0122
-TZNAME:LMT
-DTSTART:00010101T000000
-RDATE:00010101T000000
-END:STANDARD
-BEGIN:STANDARD
 TZOFFSETFROM:+0122
 TZOFFSETTO:+0100
 TZNAME:CET
diff --git a/libical/zoneinfo/Europe/Berlin.ics b/libical/zoneinfo/Europe/Berlin.ics
index ab248fa9e2..ac4fd9e39f 100644
--- a/libical/zoneinfo/Europe/Berlin.ics
+++ b/libical/zoneinfo/Europe/Berlin.ics
@@ -2,7 +2,7 @@ BEGIN:VCALENDAR
 PRODID:-//Ximian//NONSGML Evolution Olson-VTIMEZONE Converter//EN
 VERSION:2.0
 BEGIN:VTIMEZONE
-TZID:/softwarestudio.org/Olson_20010626_2/Europe/Berlin
+TZID:/softwarestudio.org/Olson_20010831_3/Europe/Berlin
 X-LIC-LOCATION:Europe/Berlin
 BEGIN:DAYLIGHT
 TZOFFSETFROM:+0100
@@ -19,14 +19,7 @@ DTSTART:19961027T030000
 RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU
 END:STANDARD
 BEGIN:STANDARD
-TZOFFSETFROM:+0000
-TZOFFSETTO:+005328
-TZNAME:LMT
-DTSTART:00010101T000000
-RDATE:00010101T000000
-END:STANDARD
-BEGIN:STANDARD
-TZOFFSETFROM:+005328
+TZOFFSETFROM:+0053
 TZOFFSETTO:+0100
 TZNAME:CET
 DTSTART:18930401T000000
diff --git a/libical/zoneinfo/Europe/Bratislava.ics b/libical/zoneinfo/Europe/Bratislava.ics
index bc80103dc0..c04634e4cc 100644
--- a/libical/zoneinfo/Europe/Bratislava.ics
+++ b/libical/zoneinfo/Europe/Bratislava.ics
@@ -2,7 +2,7 @@ BEGIN:VCALENDAR
 PRODID:-//Ximian//NONSGML Evolution Olson-VTIMEZONE Converter//EN
 VERSION:2.0
 BEGIN:VTIMEZONE
-TZID:/softwarestudio.org/Olson_20010626_2/Europe/Bratislava
+TZID:/softwarestudio.org/Olson_20010831_3/Europe/Bratislava
 X-LIC-LOCATION:Europe/Bratislava
 BEGIN:DAYLIGHT
 TZOFFSETFROM:+0100
@@ -19,21 +19,14 @@ DTSTART:19961027T030000
 RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU
 END:STANDARD
 BEGIN:STANDARD
-TZOFFSETFROM:+0000
-TZOFFSETTO:+005744
-TZNAME:LMT
-DTSTART:00010101T000000
-RDATE:00010101T000000
-END:STANDARD
-BEGIN:STANDARD
-TZOFFSETFROM:+005744
-TZOFFSETTO:+005744
+TZOFFSETFROM:+0058
+TZOFFSETTO:+0058
 TZNAME:PMT
 DTSTART:18500101T000000
 RDATE:18500101T000000
 END:STANDARD
 BEGIN:STANDARD
-TZOFFSETFROM:+005744
+TZOFFSETFROM:+0058
 TZOFFSETTO:+0100
 TZNAME:CET
 DTSTART:18911001T000000
diff --git a/libical/zoneinfo/Europe/Brussels.ics b/libical/zoneinfo/Europe/Brussels.ics
index 3f5c4b23b8..987004c129 100644
--- a/libical/zoneinfo/Europe/Brussels.ics
+++ b/libical/zoneinfo/Europe/Brussels.ics
@@ -2,7 +2,7 @@ BEGIN:VCALENDAR
 PRODID:-//Ximian//NONSGML Evolution Olson-VTIMEZONE Converter//EN
 VERSION:2.0
 BEGIN:VTIMEZONE
-TZID:/softwarestudio.org/Olson_20010626_2/Europe/Brussels
+TZID:/softwarestudio.org/Olson_20010831_3/Europe/Brussels
 X-LIC-LOCATION:Europe/Brussels
 BEGIN:DAYLIGHT
 TZOFFSETFROM:+0100
@@ -19,21 +19,14 @@ DTSTART:19961027T030000
 RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU
 END:STANDARD
 BEGIN:STANDARD
-TZOFFSETFROM:+0000
-TZOFFSETTO:+001730
-TZNAME:LMT
-DTSTART:00010101T000000
-RDATE:00010101T000000
-END:STANDARD
-BEGIN:STANDARD
-TZOFFSETFROM:+001730
-TZOFFSETTO:+001730
+TZOFFSETFROM:+0018
+TZOFFSETTO:+0018
 TZNAME:BMT
 DTSTART:18800101T000000
 RDATE:18800101T000000
 END:STANDARD
 BEGIN:STANDARD
-TZOFFSETFROM:+001730
+TZOFFSETFROM:+0018
 TZOFFSETTO:+0000
 TZNAME:WET
 DTSTART:18920501T120000
diff --git a/libical/zoneinfo/Europe/Bucharest.ics b/libical/zoneinfo/Europe/Bucharest.ics
index 942fab9ce3..fcedb76f44 100644
--- a/libical/zoneinfo/Europe/Bucharest.ics
+++ b/libical/zoneinfo/Europe/Bucharest.ics
@@ -2,7 +2,7 @@ BEGIN:VCALENDAR
 PRODID:-//Ximian//NONSGML Evolution Olson-VTIMEZONE Converter//EN
 VERSION:2.0
 BEGIN:VTIMEZONE
-TZID:/softwarestudio.org/Olson_20010626_2/Europe/Bucharest
+TZID:/softwarestudio.org/Olson_20010831_3/Europe/Bucharest
 X-LIC-LOCATION:Europe/Bucharest
 BEGIN:DAYLIGHT
 TZOFFSETFROM:+0200
@@ -19,21 +19,14 @@ DTSTART:19971026T040000
 RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU
 END:STANDARD
 BEGIN:STANDARD
-TZOFFSETFROM:+0000
-TZOFFSETTO:+014424
-TZNAME:LMT
-DTSTART:00010101T000000
-RDATE:00010101T000000
-END:STANDARD
-BEGIN:STANDARD
-TZOFFSETFROM:+014424
-TZOFFSETTO:+014424
+TZOFFSETFROM:+0144
+TZOFFSETTO:+0144
 TZNAME:BMT
 DTSTART:18911001T000000
 RDATE:18911001T000000
 END:STANDARD
 BEGIN:STANDARD
-TZOFFSETFROM:+014424
+TZOFFSETFROM:+0144
 TZOFFSETTO:+0200
 TZNAME:EET
 DTSTART:19310724T000000
diff --git a/libical/zoneinfo/Europe/Budapest.ics b/libical/zoneinfo/Europe/Budapest.ics
index 3a72403996..b315ccb41e 100644
--- a/libical/zoneinfo/Europe/Budapest.ics
+++ b/libical/zoneinfo/Europe/Budapest.ics
@@ -2,7 +2,7 @@ BEGIN:VCALENDAR
 PRODID:-//Ximian//NONSGML Evolution Olson-VTIMEZONE Converter//EN
 VERSION:2.0
 BEGIN:VTIMEZONE
-TZID:/softwarestudio.org/Olson_20010626_2/Europe/Budapest
+TZID:/softwarestudio.org/Olson_20010831_3/Europe/Budapest
 X-LIC-LOCATION:Europe/Budapest
 BEGIN:DAYLIGHT
 TZOFFSETFROM:+0100
@@ -19,14 +19,7 @@ DTSTART:19961027T030000
 RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU
 END:STANDARD
 BEGIN:STANDARD
-TZOFFSETFROM:+0000
-TZOFFSETTO:+011620
-TZNAME:LMT
-DTSTART:00010101T000000
-RDATE:00010101T000000
-END:STANDARD
-BEGIN:STANDARD
-TZOFFSETFROM:+011620
+TZOFFSETFROM:+0116
 TZOFFSETTO:+0100
 TZNAME:CET
 DTSTART:18901001T000000
diff --git a/libical/zoneinfo/Europe/Chisinau.ics b/libical/zoneinfo/Europe/Chisinau.ics
index d2e16f81ab..ec9dab97d3 100644
--- a/libical/zoneinfo/Europe/Chisinau.ics
+++ b/libical/zoneinfo/Europe/Chisinau.ics
@@ -2,7 +2,7 @@ BEGIN:VCALENDAR
 PRODID:-//Ximian//NONSGML Evolution Olson-VTIMEZONE Converter//EN
 VERSION:2.0
 BEGIN:VTIMEZONE
-TZID:/softwarestudio.org/Olson_20010626_2/Europe/Chisinau
+TZID:/softwarestudio.org/Olson_20010831_3/Europe/Chisinau
 X-LIC-LOCATION:Europe/Chisinau
 BEGIN:DAYLIGHT
 TZOFFSETFROM:+0200
@@ -19,14 +19,7 @@ DTSTART:19971026T040000
 RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU
 END:STANDARD
 BEGIN:STANDARD
-TZOFFSETFROM:+0000
-TZOFFSETTO:+015520
-TZNAME:LMT
-DTSTART:00010101T000000
-RDATE:00010101T000000
-END:STANDARD
-BEGIN:STANDARD
-TZOFFSETFROM:+015520
+TZOFFSETFROM:+0155
 TZOFFSETTO:+0155
 TZNAME:CMT
 DTSTART:18800101T000000
@@ -34,13 +27,13 @@ RDATE:18800101T000000
 END:STANDARD
 BEGIN:STANDARD
 TZOFFSETFROM:+0155
-TZOFFSETTO:+014424
+TZOFFSETTO:+0144
 TZNAME:BMT
 DTSTART:19180215T000000
 RDATE:19180215T000000
 END:STANDARD
 BEGIN:STANDARD
-TZOFFSETFROM:+014424
+TZOFFSETFROM:+0144
 TZOFFSETTO:+0200
 TZNAME:EET
 DTSTART:19310724T000000
diff --git a/libical/zoneinfo/Europe/Copenhagen.ics b/libical/zoneinfo/Europe/Copenhagen.ics
index e8cde97d16..7078f3dc76 100644
--- a/libical/zoneinfo/Europe/Copenhagen.ics
+++ b/libical/zoneinfo/Europe/Copenhagen.ics
@@ -2,7 +2,7 @@ BEGIN:VCALENDAR
 PRODID:-//Ximian//NONSGML Evolution Olson-VTIMEZONE Converter//EN
 VERSION:2.0
 BEGIN:VTIMEZONE
-TZID:/softwarestudio.org/Olson_20010626_2/Europe/Copenhagen
+TZID:/softwarestudio.org/Olson_20010831_3/Europe/Copenhagen
 X-LIC-LOCATION:Europe/Copenhagen
 BEGIN:DAYLIGHT
 TZOFFSETFROM:+0100
@@ -19,21 +19,14 @@ DTSTART:19961027T030000
 RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU
 END:STANDARD
 BEGIN:STANDARD
-TZOFFSETFROM:+0000
-TZOFFSETTO:+005020
-TZNAME:LMT
-DTSTART:00010101T000000
-RDATE:00010101T000000
-END:STANDARD
-BEGIN:STANDARD
-TZOFFSETFROM:+005020
-TZOFFSETTO:+005020
+TZOFFSETFROM:+0050
+TZOFFSETTO:+0050
 TZNAME:CMT
 DTSTART:18900101T000000
 RDATE:18900101T000000
 END:STANDARD
 BEGIN:STANDARD
-TZOFFSETFROM:+005020
+TZOFFSETFROM:+0050
 TZOFFSETTO:+0100
 TZNAME:CET
 DTSTART:18940401T000000
diff --git a/libical/zoneinfo/Europe/Dublin.ics b/libical/zoneinfo/Europe/Dublin.ics
index 48d116cdb7..30f8ceaa9b 100644
--- a/libical/zoneinfo/Europe/Dublin.ics
+++ b/libical/zoneinfo/Europe/Dublin.ics
@@ -2,7 +2,7 @@ BEGIN:VCALENDAR
 PRODID:-//Ximian//NONSGML Evolution Olson-VTIMEZONE Converter//EN
 VERSION:2.0
 BEGIN:VTIMEZONE
-TZID:/softwarestudio.org/Olson_20010626_2/Europe/Dublin
+TZID:/softwarestudio.org/Olson_20010831_3/Europe/Dublin
 X-LIC-LOCATION:Europe/Dublin
 BEGIN:DAYLIGHT
 TZOFFSETFROM:+0000
@@ -19,28 +19,21 @@ DTSTART:19961027T020000
 RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU
 END:STANDARD
 BEGIN:STANDARD
-TZOFFSETFROM:+0000
-TZOFFSETTO:-002521
-TZNAME:LMT
-DTSTART:00010101T000000
-RDATE:00010101T000000
-END:STANDARD
-BEGIN:STANDARD
-TZOFFSETFROM:-002521
-TZOFFSETTO:-002521
+TZOFFSETFROM:-0025
+TZOFFSETTO:-0025
 TZNAME:DMT
 DTSTART:18800802T000000
 RDATE:18800802T000000
 END:STANDARD
 BEGIN:DAYLIGHT
-TZOFFSETFROM:-002521
-TZOFFSETTO:+003439
+TZOFFSETFROM:-0025
+TZOFFSETTO:+0035
 TZNAME:IST
 DTSTART:19160521T020000
 RDATE:19160521T020000
 END:DAYLIGHT
 BEGIN:STANDARD
-TZOFFSETFROM:+003439
+TZOFFSETFROM:+0035
 TZOFFSETTO:+0000
 TZNAME:GMT
 DTSTART:19161001T030000
diff --git a/libical/zoneinfo/Europe/Gibraltar.ics b/libical/zoneinfo/Europe/Gibraltar.ics
index 9330fd0353..be699d799c 100644
--- a/libical/zoneinfo/Europe/Gibraltar.ics
+++ b/libical/zoneinfo/Europe/Gibraltar.ics
@@ -2,7 +2,7 @@ BEGIN:VCALENDAR
 PRODID:-//Ximian//NONSGML Evolution Olson-VTIMEZONE Converter//EN
 VERSION:2.0
 BEGIN:VTIMEZONE
-TZID:/softwarestudio.org/Olson_20010626_2/Europe/Gibraltar
+TZID:/softwarestudio.org/Olson_20010831_3/Europe/Gibraltar
 X-LIC-LOCATION:Europe/Gibraltar
 BEGIN:DAYLIGHT
 TZOFFSETFROM:+0100
@@ -19,14 +19,7 @@ DTSTART:19961027T030000
 RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU
 END:STANDARD
 BEGIN:STANDARD
-TZOFFSETFROM:+0000
-TZOFFSETTO:-002124
-TZNAME:LMT
-DTSTART:00010101T000000
-RDATE:00010101T000000
-END:STANDARD
-BEGIN:STANDARD
-TZOFFSETFROM:-002124
+TZOFFSETFROM:-0021
 TZOFFSETTO:+0000
 TZNAME:GMT
 DTSTART:18800802T000000
diff --git a/libical/zoneinfo/Europe/Helsinki.ics b/libical/zoneinfo/Europe/Helsinki.ics
index 6e30d326fc..ef8760832e 100644
--- a/libical/zoneinfo/Europe/Helsinki.ics
+++ b/libical/zoneinfo/Europe/Helsinki.ics
@@ -2,7 +2,7 @@ BEGIN:VCALENDAR
 PRODID:-//Ximian//NONSGML Evolution Olson-VTIMEZONE Converter//EN
 VERSION:2.0
 BEGIN:VTIMEZONE
-TZID:/softwarestudio.org/Olson_20010626_2/Europe/Helsinki
+TZID:/softwarestudio.org/Olson_20010831_3/Europe/Helsinki
 X-LIC-LOCATION:Europe/Helsinki
 BEGIN:DAYLIGHT
 TZOFFSETFROM:+0200
@@ -19,21 +19,14 @@ DTSTART:19961027T040000
 RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU
 END:STANDARD
 BEGIN:STANDARD
-TZOFFSETFROM:+0000
-TZOFFSETTO:+013952
-TZNAME:LMT
-DTSTART:00010101T000000
-RDATE:00010101T000000
-END:STANDARD
-BEGIN:STANDARD
-TZOFFSETFROM:+013952
-TZOFFSETTO:+013952
+TZOFFSETFROM:+0140
+TZOFFSETTO:+0140
 TZNAME:HMT
 DTSTART:18780531T000000
 RDATE:18780531T000000
 END:STANDARD
 BEGIN:STANDARD
-TZOFFSETFROM:+013952
+TZOFFSETFROM:+0140
 TZOFFSETTO:+0200
 TZNAME:EET
 DTSTART:19210501T000000
diff --git a/libical/zoneinfo/Europe/Istanbul.ics b/libical/zoneinfo/Europe/Istanbul.ics
index ca7bec10c4..67f10b0235 100644
--- a/libical/zoneinfo/Europe/Istanbul.ics
+++ b/libical/zoneinfo/Europe/Istanbul.ics
@@ -2,7 +2,7 @@ BEGIN:VCALENDAR
 PRODID:-//Ximian//NONSGML Evolution Olson-VTIMEZONE Converter//EN
 VERSION:2.0
 BEGIN:VTIMEZONE
-TZID:/softwarestudio.org/Olson_20010626_2/Europe/Istanbul
+TZID:/softwarestudio.org/Olson_20010831_3/Europe/Istanbul
 X-LIC-LOCATION:Europe/Istanbul
 BEGIN:DAYLIGHT
 TZOFFSETFROM:+0200
@@ -19,21 +19,14 @@ DTSTART:19961027T040000
 RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU
 END:STANDARD
 BEGIN:STANDARD
-TZOFFSETFROM:+0000
-TZOFFSETTO:+015552
-TZNAME:LMT
-DTSTART:00010101T000000
-RDATE:00010101T000000
-END:STANDARD
-BEGIN:STANDARD
-TZOFFSETFROM:+015552
-TZOFFSETTO:+015656
+TZOFFSETFROM:+0156
+TZOFFSETTO:+0157
 TZNAME:IMT
 DTSTART:18800101T000000
 RDATE:18800101T000000
 END:STANDARD
 BEGIN:STANDARD
-TZOFFSETFROM:+015656
+TZOFFSETFROM:+0157
 TZOFFSETTO:+0200
 TZNAME:EET
 DTSTART:19101001T000000
diff --git a/libical/zoneinfo/Europe/Kaliningrad.ics b/libical/zoneinfo/Europe/Kaliningrad.ics
index e83fde1128..7295f42b1c 100644
--- a/libical/zoneinfo/Europe/Kaliningrad.ics
+++ b/libical/zoneinfo/Europe/Kaliningrad.ics
@@ -2,7 +2,7 @@ BEGIN:VCALENDAR
 PRODID:-//Ximian//NONSGML Evolution Olson-VTIMEZONE Converter//EN
 VERSION:2.0
 BEGIN:VTIMEZONE
-TZID:/softwarestudio.org/Olson_20010626_2/Europe/Kaliningrad
+TZID:/softwarestudio.org/Olson_20010831_3/Europe/Kaliningrad
 X-LIC-LOCATION:Europe/Kaliningrad
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index e8cc1635ea..a06aefec1c 100644
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index a5ef740bf3..741ec82fbe 100644
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index bc722a6d30..389e7f98f9 100644
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