1 files changed, 35 insertions, 35 deletions
diff --git a/libical/zoneinfo/America/Thunder_Bay.ics b/libical/zoneinfo/America/Thunder_Bay.ics
index d2ec74727c..737389a789 100644
--- a/libical/zoneinfo/America/Thunder_Bay.ics
+++ b/libical/zoneinfo/America/Thunder_Bay.ics
@@ -2,7 +2,7 @@ BEGIN:VCALENDAR
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 VERSION:2.0
 BEGIN:VTIMEZONE
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+TZID:/softwarestudio.org/Olson_20011022_4/America/Thunder_Bay
 X-LIC-LOCATION:America/Thunder_Bay
 BEGIN:STANDARD
 TZOFFSETFROM:-0400
@@ -18,46 +18,48 @@ TZNAME:EDT
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 RRULE:FREQ=YEARLY;BYMONTH=4;BYDAY=1SU
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+DTSTART:19860427T020000
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 TZOFFSETTO:-0500
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@@ -67,13 +69,11 @@ DTSTART:19420209T020000
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 TZNAME:EST
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